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by Magyari, Peter; ACSM
by Unknown
by Lippincott, Williams and Wilkins
by Pescatello, Linda S., Ph.D.; Arena, Ross, Ph.D.; Riebe, Deborah, Ph.D.; et al.
by Roitman, Jeffrey L.; Bibi, Khalid W.; American College of Sports Medicine
by Wegner, Michael S., Ph.D.; Ruff, Jeanne E.; Thompson, Walter R.