The “CrossFit Total”
Work up to a 1RM in:
“Improvements have been shown in athletes that perform short-term intense (near maximal) exercise lasting approximately five minutes. The reason may be a direct effect of caffeine on muscle contraction during anaerobic exercise.
The common explanation to why endurance is improved with caffeine is that muscle glycogen is spared. Glycogen is the stored energy in the muscle tissue that is broken down during exercise. Studies suggest that glycogen sparing may occur as a result of caffeine’s ability to increase fat availability for skeletal muscle use. It is important to note, however that studies cannot fully explain the ergogenic effect of caffeine.”
-from Life Fitness, research conducted by the ACSM. Yea, we like coffee.