The State University of New Jersey. They say the exercise-caffeine combo can deflect some of the damaging effects of the sun's rays. BAD HABIT: You train hard on easy days This is the most common training mistake of all. You feel good on a scheduled easy

daisy-fresh after a nap, you need to keep it to less than 45 minutes, when you'll hit the slow-wave slumber. Aim to hit alertness-boosting stage-two sleep by sinking a coffee before you hit the pillow – caffeine takes 20-30 minutes to take effect, so you

The State University of New Jersey. They say the exercise-caffeine combo can deflect some of the damaging effects of the sun's rays. BAD HABIT: You train hard on easy days This is the most common training mistake of all. You feel good on a scheduled easy