Burak Tas1, Onur Yildirim1, Cagla Can Yeniev2
1Istanbul Gelisim University, Faculty of Sports Sciences, Istanbul, Türkiye
2Istanbul Gelisim University, Postgraduate Education Institute, Istanbul, Türkiye
Posterior Chain Strength and Countermovement Jump Performance in Female Volleyball Players: A Comparison of Ratio and Allometric Scaling Approaches
Sport Mont 2026, 24(3), Ahead of Print | DOI: 10.26773/smj.261019
Abstract
The relationship between posterior-chain maximal strength and countermovement jump (CMJ) performance may be in- fluenced by how body size is accounted for when strength is expressed and analyzed. This study examined the cross-sec- tional association between Hip Thrust maximal strength and CMJ height in semi-professional female volleyball players and evaluated whether this relationship was represented differently using conventional ratio scaling and allometric log-linear modeling. Twenty-five semi-professional female volleyball players from the Turkish Women's Volleyball 2nd League participated in the study. Posterior-chain maximal strength was assessed using the Hip Thrust one-repetition maximum (1RM), and CMJ height was determined using smartphone-based flight-time analysis. Hip Thrust strength was examined in absolute terms, relative to body mass using conventional ratio scaling (1RM/body mass), and within an allometric log-linear model including Hip Thrust 1RM and body mass. Absolute Hip Thrust 1RM was not significantly associated with CMJ height (r=0.117, p=0.579). Ratio-scaled Hip Thrust strength was also not significantly associated with CMJ height (r=0.253, p=0.222), and the corresponding regression model was not statistically significant (R²=0.064, p=0.222). Similarly, the allometric log-linear model was not statistically significant (R²=0.075, p=0.426). Within this mod- el, neither Hip Thrust 1RM (β=0.094, p=0.654) nor body mass (β=−0.266, p=0.210) showed a significant association with CMJ height. Hip Thrust maximal strength was not significantly associated with CMJ height in this sample, regardless of whether strength was expressed using conventional ratio scaling or examined within an allometric model accounting for body mass. The present small sample did not provide evidence favoring one scaling approach over the other; however, this should not be interpreted as demonstrating equivalence or comparable appropriateness of the two methods. These findings suggest that Hip Thrust maximal strength and body mass alone account for limited inter-individual variation in CMJ height and should be interpreted within the constraints of the small, cross-sectional sample.
Keywords
countermovement jump; hip thrust; body mass; female volleyball players; ratio scaling
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