Monday, December 10, 2012
The Role of Vitamins C & E
Both vitamins are examples of antioxidents, but what are antioxidents? They are compounds that protect our cells from damage caused by oxidation. This then poses the question of what is oxidation? Basically, it is a chemical reaction in which atoms lose electrons- this happens during metabolism and is fueled by oxygen, hence oxidation. Stable atoms have an even number of electrons but when oxidation occurs, it is left with an odd number of electrons- ordinarily these electrons combine with each other to make a stable electron. Some atoms do not pair; these atoms are highly unstable and are called free radicals.
The problem with free radicals is they 'want' to become stable and therefore look to 'steal' electrons from stable molecules (Thompson and Manore: 2008). This means they are actively trying to destroy other cells- that can be very dangerous. Antioxidant vitamins donate their electrons or hydrogen atoms to stabilize them. The role of antioxidant minerals is slightly more complex but the end product is eventually excreted. Antioxidents get rid of these dangerous free radicals.
Vitamin E, also known as ascorbic acid is a vitamin that protects the body against these free radicals. But more commonly it is known for preventing muscle cramps, muscle weakness and anemia (Thompson and Manore: 2008). Humans do not have the capacity for ascorbic synthesis, so therefore it must be included in the diet.Further research looking into a low vitamin E diet has been proven to cause oxidative stress. This stress has been shown to decrease the effectiveness of other natural antioxidants (Cearfoss and Hassoun: 2012). Vitamin E has its obvious benefits but it also impacts the role other vitamins play in the body, rendering it a more important vitamin than first thought.
Vitamin C is another antioxidant, it is remembered most notably for preventing scurvy in sailors, it also prevents loose teeth and can enhance iron absorption (Thompson and Manore 2008). In those who added vitamin C to their diet their systolic and diastolic blood pressure were lowered (Juraschek, Guallar, Appel and Miller: 2012). What is even more interesting is that it has been proven that the body loses control and cells begin to divide when it is deprived of vitamin C- this is cancer. A high intake of vitamin C will assist redox and immunological mechanisms behind spontaneous remissions. In 1969 it was found malignant cancer was caused by inadequate collagen- something vitamin C provides in abundance (Hickey: 2008).
The RDA for vitamin E is 15mg and foods high in the vitamin include: almonds, hazelnuts, peanuts, shrimp, sweet potato, avocado and tomato sauce. Foods high in vitamin C include oranges and other citrus fruit, kiwi, strawberries, broccoli, cauliflower and tomatoes. The body cannot absorb any vitamin C above 200mg and it is water-soluble being eliminated by the body after 12 hours (Wener, Hoeger and Hoeger: 2008).
To make a complex matter simple, vitamin C prevents cancer because it prevents cell division promoted by free radicals. It does not cure or make you exempt from cancer, but it is something that actively does prevent some cancers. Vitamin E prevents free radicals from preventing antioxidents (like vitamin C) doing their job- the example given being to stop cancer cell multiplication.
Friday, October 12, 2012
Alcohol, Dehydration and Hangovers
Every day we are bombarded with pro water and anti- alcohol
campaigns, the question is why and why just water, what’s wrong with drinks
such as Coke and tea? The science behind it proves drinks high in sugar such as
Coke drastically increase blood sugar levels thus causing the body to give up
vast amounts of water to flush out the sugar. Tea and coffee are high in caffeine;
drinks high in this substance trigger stress responses resulting in diuretic
effects leading to increased urination.
Strictly speaking, caffeine is therefore toxic for your body;
in terms of hydration your body is sacrificing water to remove it. The removal
of caffeine from the blood starves the cells of water causing cellular
dehydration and temporary blood thinning. As mentioned earlier a similar
process occurs in sugary drinks, the only difference being in a beverage like
Coke, the hormones released by the stimulation of the adrenal gland give your
brain the false impression this newly found vitality and energy was the result
of that ‘tasty beverage’.
Moving swiftly on to alcohol. Alcohol is normally 95% water and 5% alcohol so
why and how does it cause dehydration? The 5% alcohol interferes with the
anti-diuretic hormone (ADH) which is responsible for the prevention of water
loss. If your body believes it is dehydrated, a message is sent to the posterior
pituitary gland, this results in ADH being pumped out, ADH stops you urinating.
Alcohol stops the transmission of this hormone, therefore causing you to
urinate regularly when you do not need to. Research has shown that you produce
roughly 100ml of urine for every 10 grams of alcohol, 10 grams is about 330ml
of a 4% alcoholic beverage.
The major contributor to feelings of nausea and the ‘I’m
never drinking again speech’ is a substance found within alcohol- acetaldehyde.
Up to 30 times more toxic than alcohol, acetaldehyde is processed by the liver.
However, the liver is only able to do this in small amounts; researchers tend
to agree on the figure of 7 grams of ethanol per hour. Roughly translated, a
standard bud is 5%, so just fewer than one and a half of these can be processed
per hour! If you drink copious amount of alcohol in a short space of time, the
liver cannot remove this substance and it remains in your body for an extended
amount of time. This alongside mass dehydration are two major contributors to a
hangover, how can you avoid a hangover? Don’t drink so much, there is no
medical cure and drinking 6 pints of water before you go to bed will do
nothing.
Sunday, September 23, 2012
Fitness Training Tips to Build Quality Muscle
Good technique, arguably the most important aspect of training. The reason being, poor technique can be the difference between working your desired muscle group and working a completely different set of muscles altogether. Take standing dumbbell biceps curls as an example, keep the shoulders rigid and the elbow still, thus focussing the weight on the bicep muscle. When people tire they tend to swing the arm up with aid from the shoulder and force out those last few reps, the problem being the biceps are now assisted by the trapezius and deltoids- meaning less strain is placed on the biceps and therefore less chance of muscle growth. A way to avoid this is to use a mirror; a slow controlled movement will always point you in the right direction toward correct technique. Also, bring a partner, when the body is straining to force out that last rep, your focus probably will not be on is my technique right. A partner will be able to see all of the movement and critique it appropriately.
An imbalance can cause injury, hamstrings to quadriceps should be at least 60 percent but ideally 75 percent (one rep max of each then divide the hamstrings by the quadriceps). So, another tip is to train all muscles, the ‘beach body’ effect (large pectorals, biceps and abdominals) increases the chances of injury massively. A good way to ensure all muscles are being worked is to keep a diary- there are so many muscles it can be hard to remember exactly what weight you performed repetitions on the previous week. Simply writing, ‘bench-80kg’ can save time and decreases the chances of mistake and injury! It also ties in with the goals you should be setting, if in week six you bicep curled 20kg, week seven you could try 22.5kg, if this is too high, drop back to the 20kg you were doing last week but do not drop below.

Many bodybuilding forums will tell you, ‘decrease carbs, increase protein’, sounds good but actually it isn’t. Carbohydrates keep blood sugar levels constant thus, reducing fat storage and promoting the release of insulin. Insulin is the body’s natural anabolic hormone- it promotes muscle development. Eating carbohydrates straight after training prompts an insulin spike and puts your body into ‘growth mode’.
Lastly, rest! Muscles do not grow when you work out, they only grow when you rest work a specific muscle group once per week. So maybe, work biceps and pectorals on Monday and then different groups every other day of the week but do not train these two again until the following Monday. Also, sleep well- growth hormone releases when you sleep promoting muscle growth.
Tuesday, September 18, 2012
How To Make Basic Protein Balls
Ingredients:
- Whey Chocolate Protein (maximuscle): Two 30g scoops
- Instant Oats (Myprotein): Two 30g Scoops
- Honey: Tablespoon
- Vanilla extract: Cap full
- Chocolate: 80g for melting, 20g into chips
- Milk
- Icing Sugar
- Nuts (optional)
Useful Tips:
- When rolling your protein mix into balls, make sure you keep your hands dry and constantly dip your hands in the oatmix, as if you are making bread.
- These contain roughly 4.2 grams of protein per ball (dependent on what protein you use)
- When the mix becomes dry with the protein, add milk for slow release protein, water for quicker release
- Whey Chocolate Protein (maximuscle): Two 30g scoops
- Instant Oats (Myprotein): Two 30g Scoops
- Honey: Tablespoon
- Vanilla extract: Cap full
- Chocolate: 80g for melting, 20g into chips
- Milk
- Icing Sugar
- Nuts (optional)
Useful Tips:
- When rolling your protein mix into balls, make sure you keep your hands dry and constantly dip your hands in the oatmix, as if you are making bread.
- These contain roughly 4.2 grams of protein per ball (dependent on what protein you use)
- When the mix becomes dry with the protein, add milk for slow release protein, water for quicker release
| 1) Break the 80g of chocolate into melt able pieces and put into a heatproof bowl above boiling water. Cut the other 20g of chocolate into chip chunks. |
| 2) Bring the water to the boil and then turn it down to stop the chocolate burning. |
| 3) Stir until all of the chocolate is melted. |
| 4) Add a cap of vanilla extract |
| 5) Add a tablespoon (doesn’t really matter) of honey. Take off the heat and allow to cool. |
| 6) Add two scoops of protein powder and mix. |
| 7) This should produce quite a dry mix so add milk/water to produce a gloopy kind of mix |
| 8) Add the chocolate chips and mix |
| 9) Add two scoops of the instant oat mix |
| 10) Mix to produce a powdery, slightly sticky mix that can be rolled into balls |
| 11) Roll out 12 protein balls |
| 12) Cover in cling film and you can add them to mini cupcake paper case just to help keep the shape. Cling film is essential, the case is not. Refrigerate for an hour. |
| 13) Add icing sugar to make them look posh |
| 14) Eat and get ripped. |
Sunday, September 16, 2012
The Essential Amino Acids (Part 2): Methionine, Phenylalanine, Theronine, Tryptophan and Valine
Phenylalanine comes in three forms: L-phenylalanine- found in proteins, D-phenylalanine- manufactured in a lab and DL-phenylalanine- a combination of the two. Phenylalanine is converted into tyrosine, a non-essential amino acid that affects mood. Tyrosine also elevates catecholamines in the CNS and plasma; there are links between catecholamine’s and happiness hence why performance can be enhanced with tyrosine and phenylalanine because of the reduced mental stress. Why do bodybuilders use it? To keep them in the zone- put simply. Foods high in phenylalanine include: egg whites, cotton seeds, milk, beef and pork.
Similar to methionine, threonine helps the liver with lipotropic function- the digestion of fats and fatty acids, they work together to achieve this. It also helps keep connective tissues and muscles throughout the body strong and elastic, particularly the heart where it is found in abundance. Foods rich in methionine are: beans, poultry, lentils and raw eggs.
Valine is necessary for the smooth nervous system and cognitive functioning, alongside leucine and isoleucine it makes up the three BCAA’s. Derived from animal and vegetable protein, valine is used for muscle metabolism and helps speed up recovery time after exercise. It helps to maintain the correct amount of nitrogen in the body and preserve muscle tissues. Little scientific evidence supports the claims that valine actually promotes muscle growth, research has shown it does however restore muscle mass in people with liver disease, injury or have undergone surgery. Leafy vegetables, kidneys beans, poultry and milk are just some foods high in valine. An interesting point about valine, it is not processed by the liver; it is taken up by the muscles.
Friday, September 14, 2012
The Essential Amino Acids - Part 1: Arginine, Histidine, Isoleucine, Leucine and Lysine

The essential
amino acids covered in this part of the article are: arginine, histidine,
isoleucine, leucine and lysine. In total there are 10 essential amino acids;
this is because arginine is only needed in children and not adults, for this
article we will be focussing on 4 of the essential amino acids in adults. These
amino acids are essential as they cannot be created by the body, they can only
be produced from the food we eat. Interestingly, one of the non-essential amino
acids tyrosine is produced from the essential amino acid phenylalanine, so
phenylalanine deficiency will result in tyrosine deficiency also.Starting with histidine, this is generally produced by the body in adults, children may not hence it is coined a ‘semi-professional’ amino acid. It is particularly important in the myelin sheath that coats nervous cells which transmit messages to the brain. Histidine is also used to make histamine, the reason you swell and itch when you have an allergic reaction. In the muscle, histidine is resynthesized back into Carosine (alongside beta-alanine) by the enzyme Carosine synthase. Increasing histidine is linked to increased muscle Carosine concentrations- research has also found low histidine levels leads to lower Carosine levels. As a general guide, practitioners recommend 8-10 milligrams per kilogram of body weight daily, for muscle growth, 3 grams a day is a figure regularly suggested but this would be the upper end of the histidine daily intake scale. Foods high in histidine include: wheat, rye, yellow fin tuna, mackerel, chicken, beans, eggs, cauliflower and citrus fruits to name a few.
Isoleucine is one of the three branched chain amino acids (BCAA) that you always read about on the back of any good protein powder. It also has branched hydrocarbon side chains and can be interchangeable with leucine and valine (the other two BCAA’s) in proteins. These along with the other two BCAA’s promote muscle recovery after exercise as well as regulating blood sugar levels. Isoleucine biosynthesis is very complex but one of the final steps involves valine aminotransferase transferring an amino group from glutamate to produce isoleucine. It is important to remember that it can only be synthesised in plants and bacteria and the final product is used in the human diet- it cannot be synthesised by humans! Its usage post-exercise is because it maintains proteins balance to promote muscle growth and healing. It also prevents muscle breakdown and healing of the tissues after trauma i.e. a strenuous weight session. A recommended supplementation of isoleucine would be between 10-12 mg per kg of body weight daily. Foods high in isoleucine include: eggs, sausage, bacon, parmesan cheese, cod, almonds and cashew nuts.
In order to
produce a positive post workout protein balance, leucine must be consumed, it
will remain negative otherwise. As mentioned earlier, leucine is one of the
BCAA’s, however it is considered the most important BCAA as it roughly has 10
times greater impact on protein synthesis than any other amino acid. The anabolic pathway mammalian
target of rapamycin (mTOR) is activated by leucine and a decrease in leucine
signals to mTOR that there is not enough protein to synthesize skeletal muscle-
and as a result mTOR is deactivated. Some studies have shown 2.5 grams is
enough to stimulate protein synthesis whereas others have shown as much as 8
grams are needed and in athletes up to 20 grams has been suggested. It all
depends on the individual but more importantly the timing i.e. it may be 20
grams but not in one sitting- take it throughout the day. The best food sources of leucine
include any proteins from animals. The protein source with the highest leucine
content is whey. Whey contains roughly 10% leucine whereas casein slightly less, weighing in at
8%.
Fatty acids can be converted into energy and cholesterol can be lowered both made possible by carnitine- lysine is essential in the production of the compound. As well as this, lysine helps the body absorb calcium and decrease the amount of calcium lost in urine. Because of this, lysine is linked to helping bone loss associated with osteoporosis. Lysine is also important in the role of collagen which is very important for connective tissues including skin, tendon and cartilage, not many people realise that collagen is the most abundant protein in our bodies. Lysine also maintains nitrogen levels, essential because nitrogen is essential in muscle growth and if the body is excreting more nitrogen than is being used up, a warning signal is sent out that one should increase their protein intake immediately. Nitrogen excretion can be measured to determine how much protein is present in the body. The daily dosage of lysine is about 12 mg per kilogram of body weight per day. Sources of lysine include meat (specifically red meat, pork and poultry) nuts, eggs and soy beans.
Fatty acids can be converted into energy and cholesterol can be lowered both made possible by carnitine- lysine is essential in the production of the compound. As well as this, lysine helps the body absorb calcium and decrease the amount of calcium lost in urine. Because of this, lysine is linked to helping bone loss associated with osteoporosis. Lysine is also important in the role of collagen which is very important for connective tissues including skin, tendon and cartilage, not many people realise that collagen is the most abundant protein in our bodies. Lysine also maintains nitrogen levels, essential because nitrogen is essential in muscle growth and if the body is excreting more nitrogen than is being used up, a warning signal is sent out that one should increase their protein intake immediately. Nitrogen excretion can be measured to determine how much protein is present in the body. The daily dosage of lysine is about 12 mg per kilogram of body weight per day. Sources of lysine include meat (specifically red meat, pork and poultry) nuts, eggs and soy beans.
Monday, September 10, 2012
The 5:2 diet: good, bad or ugly?
The 5:2 diet is a new craze popularised by the telegraph newspaper supposedly promoting: weight loss, a longer life and immunity to cancer. You consume in essence what you want for five of the seven days in a week and the diet kicks in for the other two days. These two days can come in any order but usually precedes a normal eating day. During the two days, you limit your calorie intake to a mere 500 for women and 600 for men.
I’ll address the question that has diverted your attention away from the main theme of this article- how does it make you immune to cancer? When the body is starved, it enters survival mode- it stores what it can. Cancer however, cannot do this, so you are starving the cancer cells but not starving normal cells. Autophagy is the process where cells ‘clean up’ cellular rubbish, fasting induces profound autophagy (neuronal and general) and therefore it protects cells from the cancer.
What about just simply fasting? Fasting significantly lowers the amount of insulin in your body and a high level of insulin (more specifically insulin growth like factor 1) in the body has been linked to an enhanced cancer risk. The telegraph used the work of Professor Longo who looked at a remote population of people (fewer than 350) who do not produce IGF-1. Of these people not a single one had died of cancer. That works out to be a 350 (and counting) to 1 chance of contracting cancer for the IGF-1-less people. Numbers produced by cancer.org suggest males have a 1 in 4 chance of dying from cancer, females a 1 in 5. So, ignoring their appearance, ‘short, typically less than 4ft tall, with prominent foreheads and underdeveloped jaws’ the Laron syndrome suffers are exactly the same as everyone else, but have a much lower chance of contracting the deadly disease.
The pressing issue with a fasting diet is that cutting down calories means one major food group will suffer, either: fats, protein or carbohydrates. All of these are essential because the body looks to use fats, then carbohydrates, then protein. Cut down on fats or carbohydrates and the body uses protein quicker and takes more to compensate. Why is this a problem? Well, if IGF-1 definitely causes cancer and carbohydrates start this process, they would have both been eliminated years ago. Research from the Harvard gazette archives referring to IGF-1 found that, “a protein that binds to the growth factor seems to neutralize it and reduce the risk of these malignancies”. The reason not everyone who eats a potato contracts cancer is because the IGF-1 is neutralised by one of the six binding proteins (IGF-BP). If you allow your body to use up all of this protein because it is compensating for a decrease in fats or carbohydrates you are taking away your IGF-1 neutraliser and your cancer neutraliser. Simply decreasing the amount of protein you eat produces the same result just a lot quicker!
However, there are some of negatives of the 5:2 diet, autophagy as mentioned earlier relies on lysosomes and reactive oxygen species (ROS). Obviously ROS relies on oxygen (hence the name) and although this oxidation does destroy cells and stop cancer it can also cause chronic diseases according to Kiffin, Bandyopadhyay and Cuervo. Also, once the cancer cells are developed they may engage in autophagy to help the tumour grow in times without nutrients- Kiffin once again providing us with the research. This evidence suggests both healthy and unhealthy patients will be affected by the autophagy process.
Work produced by the telegraph and Dr. Varady shows benefits after 10 weeks of fasting under the 5:2 regime. One group was encouraged to eat low fat foods; the other group took part in the two day fasting programme (eating pizzas and lasagnes on their non-fasting days. Vardy’s study showed the 5:2 group lost the same if not more than the low fat group over the 10 week period. Of the two diets, from a health and not weight loss perspective- the 5:2 diet is much better. The low fat diet obviously neglects the body of fat (often deemed the way to lose weight) which can have catastrophic consequences. Work by the Cambridge nutrition clinic has proven that fats and cholesterol create and protect the white blood cells whereas a lack of fats can cause damage to arteries and veins as well as, heart attacks, strokes and organ failure.
Whichever way you look at it: restricting carbohydrates has strong benefits (low IGF-1) as well as strong consequences (use of protein faster). A low fat diet obviously lowers your body fat and you will lose weight, but as a result your immune system will suffer and the long term damages can be deadly. A fasting diet has been shown to reduce the chance of cancer and increase it at the same time. All restrictive diets have positives and consequences. The body may in the short term show benefits from cutting one of the seven food groups from your diet but, in the long term they are there for a reason! It may sound old fashioned but, exercise and a good balanced diet will always be best for you.
Research will carry on for thousands of years with new innovative diets and products and they will value and devalue each other but I guarantee, exercise and a good diet will never be devalued- fact. I do however have one little cheat- the exercise you have to do to lose weight is very, very light. Losing weight relies on working ‘aerobically’; this requires you working at roughly 65% of your maximum heart rate (220-age). A 20 year old for example will work at 130 beats per minute (BPM) which if you actually try it, is a very moderate jog. Doing this for per say 40 minutes a day, 3 days a week will show massive weight loss. The toning comes from working anaerobically which, granted, is hard work, but the initial weight loss phase is (to be brutally honest) easy.
To conclude, this article focused on the 5:2 diet so, does it work? Research shows it most definitely does work however, there is some research that suggests there are dangerous consequences- all be it very extreme and rare. It has to be considered the best diet out there at the minute for sure, but all restrictive dieting programes have consequences and for that, it has to be dubbed ‘the best of a bad bunch’.
I’ll address the question that has diverted your attention away from the main theme of this article- how does it make you immune to cancer? When the body is starved, it enters survival mode- it stores what it can. Cancer however, cannot do this, so you are starving the cancer cells but not starving normal cells. Autophagy is the process where cells ‘clean up’ cellular rubbish, fasting induces profound autophagy (neuronal and general) and therefore it protects cells from the cancer.
The pressing issue with a fasting diet is that cutting down calories means one major food group will suffer, either: fats, protein or carbohydrates. All of these are essential because the body looks to use fats, then carbohydrates, then protein. Cut down on fats or carbohydrates and the body uses protein quicker and takes more to compensate. Why is this a problem? Well, if IGF-1 definitely causes cancer and carbohydrates start this process, they would have both been eliminated years ago. Research from the Harvard gazette archives referring to IGF-1 found that, “a protein that binds to the growth factor seems to neutralize it and reduce the risk of these malignancies”. The reason not everyone who eats a potato contracts cancer is because the IGF-1 is neutralised by one of the six binding proteins (IGF-BP). If you allow your body to use up all of this protein because it is compensating for a decrease in fats or carbohydrates you are taking away your IGF-1 neutraliser and your cancer neutraliser. Simply decreasing the amount of protein you eat produces the same result just a lot quicker!However, there are some of negatives of the 5:2 diet, autophagy as mentioned earlier relies on lysosomes and reactive oxygen species (ROS). Obviously ROS relies on oxygen (hence the name) and although this oxidation does destroy cells and stop cancer it can also cause chronic diseases according to Kiffin, Bandyopadhyay and Cuervo. Also, once the cancer cells are developed they may engage in autophagy to help the tumour grow in times without nutrients- Kiffin once again providing us with the research. This evidence suggests both healthy and unhealthy patients will be affected by the autophagy process.
Work produced by the telegraph and Dr. Varady shows benefits after 10 weeks of fasting under the 5:2 regime. One group was encouraged to eat low fat foods; the other group took part in the two day fasting programme (eating pizzas and lasagnes on their non-fasting days. Vardy’s study showed the 5:2 group lost the same if not more than the low fat group over the 10 week period. Of the two diets, from a health and not weight loss perspective- the 5:2 diet is much better. The low fat diet obviously neglects the body of fat (often deemed the way to lose weight) which can have catastrophic consequences. Work by the Cambridge nutrition clinic has proven that fats and cholesterol create and protect the white blood cells whereas a lack of fats can cause damage to arteries and veins as well as, heart attacks, strokes and organ failure.
Whichever way you look at it: restricting carbohydrates has strong benefits (low IGF-1) as well as strong consequences (use of protein faster). A low fat diet obviously lowers your body fat and you will lose weight, but as a result your immune system will suffer and the long term damages can be deadly. A fasting diet has been shown to reduce the chance of cancer and increase it at the same time. All restrictive diets have positives and consequences. The body may in the short term show benefits from cutting one of the seven food groups from your diet but, in the long term they are there for a reason! It may sound old fashioned but, exercise and a good balanced diet will always be best for you.Research will carry on for thousands of years with new innovative diets and products and they will value and devalue each other but I guarantee, exercise and a good diet will never be devalued- fact. I do however have one little cheat- the exercise you have to do to lose weight is very, very light. Losing weight relies on working ‘aerobically’; this requires you working at roughly 65% of your maximum heart rate (220-age). A 20 year old for example will work at 130 beats per minute (BPM) which if you actually try it, is a very moderate jog. Doing this for per say 40 minutes a day, 3 days a week will show massive weight loss. The toning comes from working anaerobically which, granted, is hard work, but the initial weight loss phase is (to be brutally honest) easy.
To conclude, this article focused on the 5:2 diet so, does it work? Research shows it most definitely does work however, there is some research that suggests there are dangerous consequences- all be it very extreme and rare. It has to be considered the best diet out there at the minute for sure, but all restrictive dieting programes have consequences and for that, it has to be dubbed ‘the best of a bad bunch’.
Wednesday, September 5, 2012
The Basics of Sodium and the Sodium Balance
The body is unable to make any sodium whatsoever on its own, all of the sodiumused by the body is absorbed by the small intestine and taken up by the bloodfrom the food we eat. Sodium balance is controlled by the kidneys- when we havetoo much it is excreted in urine, when we do not have enough, the kidneypreserves what little it has. Sodium is also maintained by blood pressure (BP)and perspiration (sweat). Traditional thinking has led us to believe sodium cannot be stored- when itbecomes excess it is simply disposed of in the urine. But, recent findingssuggest it can be stored and it does not affect water movement in and out ofcells, making it non-osmotically active. Further research has failed to provewhether or not this is beneficial for exercise.
The outer layers inward of skin are covered in saltwater and the majorelectrolyte in these cells is potassium, the major electrolyte outside thesecells in the blood is sodium. The volume of water in the blood and theinterstitial fluid (the two main compartments outside cells) is determined bysodium concentration which is dependent on the amount of sodium- lots of sodiummeans there will be lots of water and vice-versa. The sodium balance inside andoutside of these cells determines the size and the function of the cells inquestion. An easy way to explain this would be to say, too little sodium in thefluid outside the cells causes the cell to swell- take the brain for example,this would cause unconsciousness.
![]() |
| Mo Farah's events will have lost him a hell of a lot of sodium |
So, as you probably know, sodium is lost in sweat as it makes up the majorityof the product. But just how much is lost? Sweat electrolyte losses can rangefrom 1000 to 3000 milligrams of sodium per hour; however some athletes havebeen known to lose 6000mg per hour- roughly translated that is two and a halfteaspoons of salt every hour!
Although potassium and magnesium are lost in sweat, the amount is negligiblecompared to sodium. This is because; the major mineral in fluids outside thebody cells is sodium (even in the plasma) so, when sweat is needed, the plasmacontaining sodium, leaves the body. Some sodium however, is preserved; this isbecause when sweat passes through the sweat glands some of it is reabsorbed asthe body attempts to conserve some of it, particularly so, if the body is not providedwith enough sodium.
Because of this, athletes more than anyone need more salt in their diet, butwill this not lead to some form of cardiovascular diseases? Well, no. Too muchsalt causes the water levels in the body to increase thus keeping the balancehowever, this will increase BP. But, athletes do not need to worry about thisbecause the excess salt will be lost during exercise and BP regulation improveswith endurance training. However, those eating high processed foods and notexercising run the risk of high BP.
Some work in the field suggests that becoming used to heated conditions (heatacclamation) reduces the amount you sweat and therefore reduces the amount ofsodium you lose. However, this is very inconclusive- studies have proven heatacclamation produces a lower rate of sweat while others have proven it producesa higher rate.
![]() |
| Salt + Water = Better hydration |
Lastly, how can you maintain a sodium balance to prevent short term acutesodium deficits? Easy, what you take out put back. When you exercise, whateversweat you lose will also lose sodium so in essence ‘put it back’ and drink lotsof water and take in lots of salt. The movement of sodium into and out of cellsacross the cell membrane is very important as this allows muscles to contract-so losing sodium will most definitely hinder performance. It is important toremember lots of sodium can be lost through little sweat so do not think, becauseI haven’t sweat that much I can’t have lost any sodium and therefore don’t needto replenish my stores- you do. Next time you exercise drink plenty of waterafter and have a salty meal alongside it, or cut out the middle man and add acouple of pinches of salt to your water, winning.
Friday, August 31, 2012
Is running with music beneficial?
This article is inspired by the research findings of
Professor Peter Terry. Let’s start with a case study, Haile Gebrselassie- 10,000 metre gold medalist at both the Olympic Games (Sydney 200 and Atlanta 1996) and the world championships (1993, 1995, 1997, and 1999). Type his name into Google followed by the word ‘music’ and the number of results (last time I checked) was 270,000, to say it is common knowledge of his preference, would be an understatement.
Birmingham 1998
and Gebrselassie is just about to run the 2000m at an indoor event when
‘Scatman (Ski Ba Bop Ba Dop Bop)’ by ‘Scatman John’ starts booming through the
speakers. After the initial confusion, four minutes fifty two seconds later
Halie had a personal best and a new world record was set. However, the IAAF
later erased this record for ‘cheating’, suggesting there is some basis to the
argument that running with music is beneficial?
Switching sports
quickly, a problem triathlete’s encounter is getting off of their bikes and
running too quickly. This is because of the speed they reach whilst on the
bike, when they get off they perceive themselves to be going too slow, they
then run faster and tire quicker. To counter this, many triathletes sing to
themselves to keep good pace- further evidence supporting the use of music.
Professor Peter
Terry conducted a study looking at cyclists in an all-day cycling event (i.e.
twenty four or more hours); the cyclists either heard an audiobook or
motivational music. Arount the 18 and 24 hour mark, the motivational music group were
lapping (400m track) twenty seconds faster than the audiobook group. Professor
Terry and colleagues also performed a meta-analysis of 100 studies and found
that there was a .28 benefit for those exercising and a .35 benefit for those
in a sporting condition (a match for example). For this study it showed: music was
better than no music and that music in a sporting condition produced better
results than just general exercise.
From this
research, Terry was able to conclude that there were benefits of music and he
placed them in order of occurrence (what is experienced by athletes the most):
- 1) Psychological benefits: feelings are more positive and the overall mood is better
- 2) Physical benefits: actual benefits of music, an example being Gebrselassie, you run faster
- 3) Perceived exertion: you feel as if you have not worked that hard because the upbeat music suggests you too are upbeat and have a lot of energy left.
- 4) Physiological benefits: better blood flow for example, this can actually happen as music can relax the body and produce this better flow of blood. There are two types of music that can be used when exercising: synchronously, timing the music to your running tempo and asynchronously which is any music.
- 1) Psychological benefits: feelings are more positive and the overall mood is better
- 2) Physical benefits: actual benefits of music, an example being Gebrselassie, you run faster
- 3) Perceived exertion: you feel as if you have not worked that hard because the upbeat music suggests you too are upbeat and have a lot of energy left.
- 4) Physiological benefits: better blood flow for example, this can actually happen as music can relax the body and produce this better flow of blood. There are two types of music that can be used when exercising: synchronously, timing the music to your running tempo and asynchronously which is any music.

Lastly, looking
at the ergogenic benefits of music, Peter Terry’s study found by slowly
increasing the music tempo, the athlete increased their speed with no perceived
exertion. So, the athlete was able to work harder but did not actually think
they were! Linking in with this, an upbeat song that makes you feel more upbeat
is known as emotion contagion; Terry believed this was happening during the
running. Movement contagion however, is where the music is reflected in your dance/movement,
so for example, in Brazil the ‘samba’ is a very popular dance move and you will
see several soccer players dance the ‘samba’ to celebrate. This dance is
supposedly reflected in the Brazilian play which is typically: free, effortless
and skillful. Next time you’re playing soccer and you’re losing, wack on some ‘Scattman’
over the speakers, dance the samba and within five minutes you’ll be
winning.
Monday, August 27, 2012
The Basics of Protein
Protein is made up of 20 amino acids, of these
20, 11 are non-essential and 9 essential/indispensable. The 9 indispensable
cannot be produced by the body and can only be made by the consumption of
certain foods (hence the name 'essential'). The protein we eat is broken down
into amino acid form by the gut or gastrointestinal system.
In the muscle, the main amino acids are branch
chain amino acids which are oxidised for energy. They also play a huge part in
muscle building because Leucine (which is part of the chain) stimulates muscle
growth. Amino acids in the muscle contain nitrogen; nitrogen is great at
‘building things’ hence amino acids were given the nickname 'the building
blocks of protein'. However, when amino acids are broken down, nitrogen becomes
useless because it contains ammonia which is toxic to the body and must be
removed safely. Nitrogen is therefore removed by the liver and kidneys and
subsequently excreted as urea.
The body’s first source of energy is actually
carbohydrates, then fats and when these both run out it turns to amino acids. Protein contributes roughly 3-5% of your total energy expenditure, so where it is important to consume plenty of protein, carbohydrates and fats
are equally as important.
For this piece we are focussing on proteins,
not fats and carbohydrates so in terms of ‘how much protein should I be
eating?’, a sedentary person consumes roughly about 0.8 grams(g) of protein per
kilogram(kg) of body weight per day so,
a 60kg person should consume 48g of protein daily (60*0.8). However, an elite
endurance athlete or a weight lifter should roughly be intaking 1.6-1.8g of
protein per kilogram of body weight per day. Which means that same 60kg
person needs between 96 and 108 grams of protein daily!
Protein
requirements are always recommended to be 30% of your daily diet, sedentary or active but, where an active person
will increase their protein intake, they will also increase fat and
carbohydrate intake, keeping protein at the 30% threshold (Carbohydrates 45% and fats 25% respectively).
As stated earlier, an endurance athlete will
need the same amount of protein as a weightlifter. Despite many misconceptions!
Why? The reason is simple: endurance athletes have a higher workload and a
higher energy expenditure and so they burn carbohydrates and fat quickly and
move on to protein quicker as a result.
What about too much protein? Many people
think, drinking protein shakes before and after the gym will give them the
desired effects. If you're not putting the work in and you're not using the
protein up, the nitrogen will be stripped away by the kidneys and the rest
stored as fat. Side effects of excessive protein include: high calorie gain and
dehydration... And who wants that, really!?
Friday, August 24, 2012
Introduction
Welcome to 'thesportscience' blog! Blogs will be posted weekly and tweets almost daily. This blog will take research from several areas and present it in a short to the point form. Some blogs will look at specific papers from various faces in the sports industry whereas other blogs will simply be explanations of complex topics.
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