of caffeine drinkers, who downed 1.4mg of caffeine per pound of body weight (a 355ml coffee for a 68kg person), had a 1.2 per cent improvement in an 8K race. "They were able to maintain a higher intensity without undue fatigue," says study author Dr Michelle

it gushes from your tap. The addition of chlorine is the most widely used method of disinfectant.Harmful effects: In small doses, chlorine is literally a lifesaver, as it kills dangerous contaminants. But studies show that long-term exposure to chlorine

and easing post-workout pain. Some of the 19,000 or so caffeine-based studies carried out over the years indicate benefits for asthma sufferers and Harvard Medical School has stated: "Coffee may reduce the risk of developing gallstones, discourage

medicine groups, which have generally advised endurance athletes to drink 600ml to 1,200ml per hour. This is more or less where things stood before the NEJM publication last spring. A trio of triggersAfter the NEJM article appeared on 14 April, I waited a

, as in lowered mortality and heart-disease risk. Which isn’t to say walking does nothing for you (it does). Running simply does more, as two major studies have proven recently:Regular vigorous activity reduced mortality risk significantly among 17,000 men

number of psychological disciplines based at five UK universities. It is funded by a grant from the UK's Economic and Social Research Council (ESRC), worth £2.1m over four years (Nov 2008 to Oct 2012).Who is Andy Lane?Andy Lane is a professor of Sport

. These pills come with a hefty price tag, and you may have to take them three times a day. If you decide to take glucosamine and chondroitin supplements, take 1,200 to 1,500 milligrams of each per day.

Neck painTen neck massages over 10 weeks. Sound good? People with chronic neck pain reported a 55 per cent improvement after this regimen, according to a study in the Clinical Journal of Pain. They even scored 39 per cent better on the worst

beverage (such as a sports drink) could help you recover faster. Another study, published in the journal Nutrition, found that a total of 10 milligrams of the supplement taken after exhaustive exercise such as a marathon could cut the risk of catching a

, I have calculated the correlation for the ‘over two years' experience’ group. The correlation came out as -0.342. A perfect correlation would be +1 or -1. We therefore cannot say that increased running will always lead to reduced stress, but we can