Introduction
CONTRACTION
A warm-up is performed prior to exercise to prevent possible injury and enhance subsequent performance. An increase in muscle temperature, blood flow, and improved readiness of the neuromuscular systemDespite the undeniable benefits of warm-up, methods are still being sought that will further increase its effectiveness, but also shorten its duration and reduce the associated effortCardinale and LimConsidering warm-up procedures, individuals may also try to exploit the effect of post-activation performance enhancement to further the benefits following a warm-up. An example would be an expected increase in performance (i.e. in vertical jumping) a few minutes after performing a low-volume conditioning maximal voluntary contraction like a plyometric exercise (i.e. a drop jumps at the end of the warm-up)The objective of this study was twofold. First, to examine whether acute whole-body vibration, a single bout of drop jumps, or a combination of both may enhance CMJ performance. Second, we attempted to evaluate if (i) performed warm-up protocols would affect volitional pace running and (ii) if this running would have an additional effect on jumping ability above and beyond that of the applied warm-up procedures. Given that previous studies showed enhancement in explosive performance after whole-body vibration