to their normal lengths. Then when you start to exercise, your muscles stretch even more to about 10 per cent longer than their resting lengths. This means you have a 20 per cent change in muscle length from the time you get out of bed until your muscles are well

-jogging; 1:36 on a ski machine; 1:15 on a step machine; 1:36 on an exercise bike; and 1:36 on a rowing machine.10. I need strong legs for running, why should I work on my upper body?There's no doubt that your legs are your main priority when it comes

for Stuart Barr, 39, and Nicholas Davis, 32, who both live in Cumbria – a part of the world not exactly renown for its mild winters. They often run 10-13 miles together at about 4am, a particularly bleak time to run when the northern climate is blowing wind

the equivalent of eight large glasses of water every day, and probably twice that in warm weather. It also means taking in about half a pint of fluid every 15-20 minutes of running. For runs of an hour or more, you also need to replenish spent energy stores