Post by robinsoinj on Nov 14, 2018 8:02:09 GMT
pre-workout supplement is a stimulant that acts upon the central nervous system in humans. It is also a metabolic stimulant since it increases the metabolism. Caffeine works as a metabolic stimulant by releasing fatty acids into the blood stream to be used as energy. This means that when caffeine is taken before training it works as an excellent fat burner.