A lot of bodybuilders have tried prohormones, hoping to find a legal and effective way of increasing their testosterone levels. However, new research has surfaced indicating that prohormones may not be the best choice for athletes looking to enhance their anabolic hormone levels and muscle strength, since there are many side-effects associated with prohormone supplementation. In fact, there is an amazingly effective new sports performance product called ZMA(a precise combination of zinc and magnesium) that has been clinically proven to significantly increase both anabolic hormone levels and muscle strength in trained athletes. Zinc, magnesium and vitamin B-6 are all involved in metabolic processes of the body, and play a vital role in protein synthesis. During exercise these nutrients are lost, either through perspiration or metabolism. The function of ZMA supplementation then, is to replace these nutrients which, in turn, may facilitate a number of processes that may improve athletic performance. ZMA is a very effective sleep aid and is recommended to be taken 30-60 minutes before bedtime. Many athletes fail to realize how important it is to get a deep and restful sleep. Healing, tissue repair, anabolic hormone production and muscle growth are maximized during sleep, so quality sleep is extremely important to athletes.