, they are not easily accessible while on the move. Good For Faster runners or medium (10- to 15-mile) runs. How It Rated Comfort/Stability 7 Functionality 7 Durability 8 Weight/Bulk 8 Added Extras 4 Nathan HPL O2O Race Vest, £35 Water Capacity 2L Contact

to drink before, during and after sessions. It's time to separate the facts from the fiction.Myth 1: Replace every lost litreFor a long time triathletes have been told in stern tones to drink enough on the bike so that they weigh the same after the ride

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

of your urine. University of Connecticut researchers found that urine colour correlated very accurately with hydration status. Pale yellow urine indicates you're within one per cent of optimal hydration. Try to drink one litre of water for every 1,000kcal

and have been shown to reduce running performance over 10K by as much as 2 minutes. It is also worth noting that cases of exertional heat illness, such as heatstroke, are not isolated to the summer months. The best way to assess your fluid loss

of heat illness HEAT EXHAUSTIONCause Failing to replace fluids and electrolytes when dehydration sets in.Symptoms A core body temperature of 102°F to 104°F, headache, fatigue, profuse sweating, nausea, clammy skin.Action plan Apply a cold pack on the head

crashed. He now believes he did too many hard 20-milers in the heat. "I was exhausted from the first step of the marathon," he says. He finished 15th in 2:14:19.HydrationEveryone knows drinking fluids is supposed to help you run faster. But you have

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

of the various sizes to carry is also the smallest, but it only holds 130ml of liquid – and when you consider that you should really be aiming for 150-250ml of liquid for every 20 minutes of running, they don’t offer a huge range. Far more useful are the medium

and to replace fluid you've lost trhough sweat. The guidelines are: 1g of carbohydate per kg of body weight as soon as possible after exercise, plus 10-20 g of protein. As for fluid, drink according to the amount of weight you've lost. Monitor your urine colour