DISCUSSION
The primary findings of this study was that 6-week strength training with whole body vibration produced a significantly greater improvement in jumping performance and maximal leg strength than conventional training alone in well-trained volleyball and beach volleyball players. Interestingly, greater effects could be expected among beach volleyball players. To the author's knowledge, this is one of the first studies aimed at examining the effect of WBV added to routine training on jumping performance in well-trained volleyball and beach volleyball players. The results of the present study support previous findings indicating that WBV training produces a moderate-to-large effect on jump performance [18].