Caffeine has several functions: it is a powerful central nervous system stimulant, it’s a thermogenic (which means it increases your metabolic rate along with your core body temperature), it can enhance adrenaline release, it allows body fat to be burned as fuel, and it spares muscle glycogen which will improve endurance.*
For best results, take Caffeine approximately three hours before your workouts; remember to drink plenty of fluids. The positive training benefits will be reduced if you use caffeine every day. To insure optimal training benefits, limit the use of Caffeine through foods and beverages.