Electromyographic Comparison of a Stability Ball Crunch With a Traditional Crunch - Sternlicht, Eric; Rugg, Stuart; Fujii, Larissa L.; Tomomitsu, Keri F.; Seki, Matt M. (Journal of strength and conditioning research, 2007)
Keywords: Back; Data collection; Effectiveness; Movement; Muscular system; Physical fitness; Shoulder; Training