Differences Between Standard and Sport-Specific Countermovement Jumps in High-Performance U18 Male Water Polo Players: A Cross-Sectional Study

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dc.contributor.authorBăltean, Alexandru Ioan
dc.contributor.authorde Hillerin, Pierre Joseph
dc.contributor.authorGeantă, Vlad Adrian
dc.date.accessioned2026-01-15T11:25:07Z
dc.date.available2026-01-15T11:25:07Z
dc.date.issued2025-12-27
dc.description.abstractIntroduction: Vertical jump capacity is essential for evaluating lower-limb performance in water polo, especially under dryland testing conditions. While power or force is often implied, jumping height remains the primary measurable outcome in these protocols. Aim: This study aimed to compare vertical jump performance in U18 male water polo players using two jump types: the standard Counter-movement Jump (CMJ) and a modified "Frog Style" CMJ (CMJ-Frog), hypothesizing that the latter better reflects sport-specific lower-limb mechanics. Materials & Methods: A cross-sectional, within-subjects design was employed on a sample of 39 male water polo players from the Under-18 category (mean height: 183.02 ± 5.43 cm; mean weight: 75.20 ± 10.41 kg). Each athlete performed three maximal trials of two jump protocols: the standard Counter-movement Jump (CMJ) and the modified sport-specific CMJ-Frog. Jump height was measured using the OptoJump Next system. Data analysis comprised descriptive statistics and normality assessment using the Kolmogorov–Smirnov test. Inferential statistics were conducted via paired-samples t-tests to compare protocols within subjects, with effect sizes calculated using Cohen's d. Results: CMJ-Frog jumps yielded significantly higher values (37.43 ± 4.59 cm) than standard CMJs (34.17 ± 4.49 cm), t (38) = -7.46, p < .001, with a large effect size (d = 1.19). Conclusions: The CMJ-Frog style may serve as a more functionally relevant assessment for evaluating vertical jump capacity in Under-18 male water polo players, as it better reflects the mechanics of aquatic elevation during gameplay. It may offer a more specific alternative for performance testing and monitoring in aquatic athletes. Future studies should validate the CMJ-Frog protocol in senior players and investigate its relationship with in-water performance metrics.  en
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dc.identifier.citationStadium - Hungarian Journal of Sport Sciences, Vol. 8 No. 2 (2025) ,
dc.identifier.doihttps://doi.org/10.36439/shjs/2025/2/16119
dc.identifier.eissn2676-9506
dc.identifier.issue2
dc.identifier.jatitleStadium
dc.identifier.jtitleStadium - Hungarian Journal of Sport Sciences
dc.identifier.urihttps://hdl.handle.net/2437/402853
dc.identifier.volume8
dc.languageen
dc.relationhttps://ojs.lib.unideb.hu/SJSC/article/view/16119
dc.rights.accessOpen Access
dc.rights.ownerAlexandru Ioan Băltean, Pierre Joseph de Hillerin, Vlad Adrian Geantă
dc.subjectvertical jump, water polo, CMJ, sport-specific testing, lower-limb performance, athletic performance, jump heighten
dc.titleDifferences Between Standard and Sport-Specific Countermovement Jumps in High-Performance U18 Male Water Polo Players: A Cross-Sectional Studyen
dc.typefolyóiratcikkhu
dc.typearticleen
dc.type.detailedidegen nyelvű folyóiratközlemény hazai lapbanhu
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