Inter-limb jump asymmetries and their association with sport-specific performance in young male and female swimmers

Phukan, Max I., Thapa, Rohit K. ORCID: https://orcid.org/0000-0002-1258-9065, Kumar, Gopal, Bishop, Chris ORCID: https://orcid.org/0000-0002-1505-1287, Chaabene, Helmi ORCID: https://orcid.org/0000-0001-7812-7931 and Ramirez-Campillo, Rodrigo ORCID: https://orcid.org/0000-0003-2035-3279 (2021) Inter-limb jump asymmetries and their association with sport-specific performance in young male and female swimmers. International Journal of Environmental Research and Public Health, 18 (14) , e7324. ISSN 1660-4601 [Article] (doi:10.3390/ijerph18147324)

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Abstract

This study aimed to examine inter-limb jump asymmetries and their association with sport-specific performance in young swimmers. Thirty-eight (male, n = 19; female, n = 19) regional/national level young swimmers (age: 12.3 ± 1.2 years; height: 159.6 ± 8.2 cm; body mass: 52.5 ± 9.2 kg) participated in this study. Inter-limb asymmetries were assessed for single-leg countermovement jump (SLCMJ) and single-leg standing long jump (SLSLJ). Sport-specific performance was evaluated using front crawl (i.e., 50 m and 25 m) and front crawl kick (i.e., 50 m and 25 m). The kappa coefficient revealed a “slight” level of agreement (Κ = 0.156, 0.184, and 0.197 for female, male, and all, respectively) between the direction of asymmetry for SLCMJ and SLSLJ, indicating that asymmetries rarely favored the same limb during both tests. A paired sample t-test showed a significant difference (p = 0.025) between asymmetry scores obtained in SLCMJ and SLSLJ. No significant difference was found in asymmetry scores between males and females (p = 0.099 to 0.977). Additionally, no association between asymmetry scores and sport-specific performance was observed (p > 0.05). Our findings highlight the independent nature of inter-limb asymmetries derived from SLCMJ and SLSLJ among young male and female swimmers. Further, our results suggest no association between jumping asymmetries and sport-specific performance.

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