BAD HABIT: You’re a night owl Runners who short-change sleep compromise recovery, immunity and mental sharpness, which can turn an easy workout into a gruelling one. "Sleep enhances the restoration of cells damaged by exercise," says Professor Jim Horne from the Sleep Research Ce...
, what you ate, the weather and even your general mood before, during and after each run," adds Wood. "It'll help you identify patterns and the cause and effect of good and bad runs." And training logs don't have a ‘use by' date. "I have all my training
