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

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. To read the full article (including a breakdown of how much caffeine could be in your favourite hot

when we stop? When I gave up my 1-2 daily espressos I felt so bad I took to my bed for 48 hours. On the third day I had only a slight headache; on the fourth day I felt great, and did a run so enjoyable I still remember it. I occasionally succumb for a

. Caffeine is a common ingredient as well. These ingredients show promise as weight-loss aids, but they also have been proven to be dangerous – and even deadly – for some users.Both ephedrine and caffeine are powerful central nervous system stimulants, which

, coffee reduces absorption of iron and immunity-boosting zinc, according to a study at the University of Lyon, France....your heartUpper: Coffee drinkers with little self-control can take heart: Harvard researchers tracked 128,000 people for 20 years

to 20 minutes while you train.Myth 3: Caffeine will dehydrate youCaffeine has long been demonised as a diuretic. That means it should lead to dehydration and heat stress, especially when you consider that it raises your heart rate and increases your

the flavour) destroys chocolate's antioxidants, so make the drink using pure powdered cocoa.A 2003 study published in the Journal of Agricultural and Food Chemistry found that hot cocoa boasts more antioxidants than red wine, tea and even cold chocolate milk

’ll be okay. So I began to look for my spinach.I wasn’t as smart as Popeye. I figured that caffeine, alcohol and nicotine would work just fine. Whenever I was in trouble, I reached for one of those. It sort of worked. Caffeine made me feel stronger, alcohol

stress, caffeine, alcohol and certain drugs (including some cold cures). Many athletes will experience palpitations, which usually only last a couple of seconds, during their athletic career. Indeed, everyone will experience palpitations at some time

. At Ironman New Zealand in 1997, men expended, on average, 10,036 calories and consumed 3,940. Women burned 9,253 calories and consumed 3,115.Aim to take in around 250 calories an hour from food, and roughly the same from sports drinks. Studies suggest