exercise for extended periods of time, your body produces a lot of heat energy. This means that it has to continually try to maintain a constant core temperature. The most visible way the body does this is by producing sweat. However, your blood, as well

levels and insulin resistance.The carbohydrates and fats in our diet are important sources of energy, and carbohydrate is particularly important for runners as it is the preferred source of fuel for exercise. The body’s ability to maintain a constant

intensity can increase the requirement of some vitamins, especially those involved in the production of the body’s energy. However, most people who run will naturally increase their intake of food to meet their energy demands and will therefore be getting

for the final hurdle: A long, energy-sapping drag up to the railway station and Ruislip driving range. Luckily for you, what goes up must come down, and the drop through Sharp’s Lane takes you to within sprinting distance of the finish. What you said in 2003

Q I’m a bit overweight so I’ve taken up running. If I stick to the recommended 2,000kcal a day for a woman, will I lose weight? If I eat fewer calories presumably I’ll lose weight faster, but will I have enough energy to run?A Regular running

the refined sugar that's stuffed into most of those you find in supermarkets. And if you're partial to a mid-morning muffin after a run, make them yourself using wholemeal flour – wholemeal carbohydrates release their energy much more slowly than refined carbs

saves energy. Drafting is not allowed in age-group racing. There is always a stipulated minimum distance that must separate two riders, and a maximum time given to overtake another rider. These numbers vary so find out the information before you race

to four miles to take the edge off your pent-up energy so you’ll sleep better that night. Mental Preparations “Confidence should be the focus of the final week,” says Hays. “But you may still experience anxiety. If so, remind yourself that you

fractures, but in the long term difficulty conceiving and the early onset of osteoporosis are also possibilties.In the 1970s experts thought amenorrhoea was linked to weight loss or low body fat but that view has since changed. Now an energy imbalance

marathon or other endurance race. Carbohydrates are, after all, the top choice for fuel and the best energy source. "Runners should be taking in about 55 to 65 per cent of their calories in the form of carbohydrates,"says RW Nutrition Editor Anita Bean