American College of Sports Medicine position stand. Progression models in resistance training for healthy adults - Kraemer, W J; Adams, K; Cafarelli, E; Dudley, G A; Dooly, C; Feigenbaum, M S; Fleck, S J; Franklin, B; Fry, A C; Hoffman, J R; Newton, R U; Potteiger, J; Stone, M H; Ratamess, N A; Triplett-McBride, T (Med Sci Sports Exerc, 2002)