be equally draining. "What most runners don't appreciate is just how much energy your brain uses, especially when it's pumped with adrenalin," says Charlie Pedlar, endurance physiologist with the English Institute of Sport (EIS)."Your heart beats faster
.co.uk. "That's when sleep should really become your primary training component and biggest focus." And if you lie awake tossing and turning with anxiety the night before a race? Don't sweat it. The Journal of Sports Medicine and Physical Fitness reports
