improvement in alactic muscular power outcomes. It is not entirely clear which aspects of RT interventions are responsible for inducing improvements in muscular power as studies often included combined training modalities in addition to habitual sporting practice. It does appear that improvements are specific to the type of training employed and are influenced by movement pattern, movement velocity,contraction type, and contraction force. Plyometric only training had a larger overall effect (Z=3.04) on vertical jump height than studies with RT combined with plyometric and/or speed training (Z=2.69) or studies that consisted of RT only (Z=1.95) . Studies that compared RT to combined RT and plyometric training in addition to RT. 17,40-42,51 However,these larger improvements may be in part attributable to an increased volume of work performed, as none of these studies equated the amount of work performed between groups.