Discussion
The main purpose of this study was to determine whether whole-body vibration, drop jumping, or a combination of both can contribute to the acute improvement of CMJ performance. Additionally, a 3 km volitional pace running was then performed, followed by CMJ, to examine if continuing the warm-up would have an additional effect on jumping ability. The main finding of this experiment was that none of the warm-ups applied had an effect on both jumping and running. In turn, the 3 km volitional pace running significantly improved the CMJ performance for each of the conditions.Surprisingly, the results of this study contradict some reports regarding the acute effect of whole-body vibrationIn addition, a single bout of drop jumps was ineffective in the acute improvement of CMJ performance, despite previous studies finding significant enhancement of jumping performance following a set of low volume drop jumps (5–6 repetitions)Moreover, to the best of the author's knowledge, there is a lack of studies that examined the acute impact of whole-body vibration or in a combination with drop jumps on endurance running performance. A study by Padulo et al.Interestingly, regardless of the warm-up type, improvements in CMJ performance were only noted after the 3 km volitional run (lasting approximately 15 min). Therefore, this might simply mean that the warm-up protocols used were insufficient in terms of volume or that bodyweight exercises may not provide beneficial effects in this population. Considering, the post-activation performance enhancement effect, in the recent metanalysis Brink et al.Certain limitations of the current study have to be mentioned. First, we assessed only a single time point after the applied warm-ups (3 min), so there is no certainty that any change could be noted at another time point. Secondly, we only measured the duration of the run without evaluating the running gait kinematics, and we did not assess subjective emotions related to the effort made. Furthermore, we did not measure whether the tonic vibration reflex was evoked.