Using interactive computer-technology, Len will clearly show you the intricate mechanisms involved in muscle contraction. This presentation will interactively show and explain the muscle dynamics of strength and hypertrophy. Many questions about muscle will be answered regarding specific applications to training including: what is the cause of the burn? Why does an eccentric contraction generate so much force? What is the best physiological program design for hypertrophy and strength improvements? What happens as muscle ages? What happens to muscle as it gains and loses flexibility? And More! Archive film footage of some of the pioneers of strength training and their feats of strength will be shown throughout the presentation.