Objectives: The aim of this study was to analyze the jump load performed by top-level volleyball players during an entire training season in terms of the player role, training period, type of daily training, and quality of opposition in the subsequent match. Design: Longitudinal panel observational study. Methods: The total number of jumps performed by players was recorded through 174 training days distributed in 32 weeks during the 2016/2017 season (pre-season, 5 weeks; in-season, 27 weeks). The players role were classified as middle-blocker, outside-hitter, opposite and setter (the libero was omitted). A generalized mixed linear model was performed (with Bonferroni post hoc test at p < 0.05) to assess the effect of training variables and the repeated-measures data of players` jumps along various training days. Additionally, the effect sizes at 95% confidence intervals were calculated to compare the jump load between players` role and training variables. Results: The results showed a significant and moderate higher amount of jumps performed by middle-blockers regardless the type of macro- or micro-cycle, the micro-cycle phase, the type of training and the quality of match opposition. Contrarily, the setter performs the least jump load in all variables analyzed. Only the players` role, macro-cycle and micro-cycle phase had significant effects on the player's jump load variation along the season. Conclusions: This information could be useful to guide the monitoring and preparation process for coaches and physical trainers. These values allow differentiating between players` role and could be used as references values in order to avoid injuries whereas performance increase along the season.
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