Why you slow down You’ve run out of gas and all the stored energy in your muscles has been used up.
Speed up Get off the bike, start running and teach your muscles to store more energy so you can cycle farther and faster. Trainer Richard Kemp suggests these simple running intervals:
1. Fours“Run to the half way line of a football pitch four times with the goal of finishing in less than 24 seconds,” says Kemp. Rest 40 seconds and repeat 8-12 times.