Impact of morphological characteristics and jumping ability on block jump height

This study investigated the combined impact of morphological characteristics and jumping ability on block jump height in volleyball. A sample of 28 elite male volleyball players, age 16.43 ± 2.47 years, was assessed using a battery of tests that measured nine variables, three of each category: anthropometry was evaluated via body height (BH), body mass (BM), and standing reach (REACH); jumping ability was evaluated via countermovement jump (CMJ), countermovement jump with arm swing (CMJA), and squat jump (SJ); block jump height was evaluated via two-foot jump block (BJTF), slide step jump block (BJSS), and crossover step jump block (BJCS). Descriptive statistics confirmed that the players' values aligned with normative data for their age group, and the assumption of normality of distribution was supported. Factor analysis revealed unidimensional constructs for anthropometry (explaining 74.46% of variance), jumping performance (95.69%), and block jump height (97.62%). A backward regression analysis demonstrated that both the anthropometry and jumping performance factors were significant predictors of block jump height (R² = 0.855, p < .01), with jumping performance exhibiting a slightly greater influence. These findings suggest that while both morphological characteristics and jumping ability are important, the capacity for explosive movement may be more critical for successful blocking in volleyball. Future research should consider larger and more diverse samples to further validate these results and refine training strategies aimed at enhancing block performance.