The Impact of Upper Extremities and the Eccentric Phase of Muscle Contraction on Jump Performance in U15 Volleyball Players
Session
Sport, Health and Society
Description
Aim: this study aims to evaluate the effect of concentric muscle contraction phases and upper body training on volleyball jump performance. It seeks to determine how improvements in technique and strength can enhance jump heights, specifically in the Countermovement Jump (CMJ) and Squat Jump (SJ), and to develop more effective training methods for volleyball players. Methods: the study involved 10 female volleyball players (U15) from KV Theranda, with an average height of 157.0 cm and weight of 48.8 kg. Body height and composition were measured using Tanita BC 545 N Innerscan scales. CMJ and SJ performance was assessed using the My Jump 3 app and a force platform. Data were analyzed using SPSS 26, with the Shapiro-Wilks test for normality and ANOVA to evaluate differences across testing periods. Results: results indicated statistically significant improvements in CMJ performance compared to SJ (p<0.05). Factors contributing to better vertical jump performance included elastic force stored in the tendons during the eccentric phase and arm swing momentum. The difference between CMJ and SJ was approximately 70%, attributed to arm swing technique and tendon elasticity. Conclusion: CMJ demonstrated a clear advantage over SJ, largely due to elastic energy in the tendons and arm swing. The findings highlight the need for further research to distinguish between the effects of arm technique and tendon elasticity and to explore their individual contributions to jump performance.
Keywords:
Performance, Jump, Plyometrics, Strech and Shortening Cycle, Technique
Proceedings Editor
Edmond Hajrizi
ISBN
978-9951-982-15-3
Location
UBT Kampus, Lipjan
Start Date
25-10-2024 9:00 AM
End Date
27-10-2024 6:00 PM
DOI
10.33107/ubt-ic.2024.236
Recommended Citation
Shabani, Alberina and Berisha, Milaim, "The Impact of Upper Extremities and the Eccentric Phase of Muscle Contraction on Jump Performance in U15 Volleyball Players" (2024). UBT International Conference. 2.
https://knowledgecenter.ubt-uni.net/conference/2024UBTIC/SHS/2
The Impact of Upper Extremities and the Eccentric Phase of Muscle Contraction on Jump Performance in U15 Volleyball Players
UBT Kampus, Lipjan
Aim: this study aims to evaluate the effect of concentric muscle contraction phases and upper body training on volleyball jump performance. It seeks to determine how improvements in technique and strength can enhance jump heights, specifically in the Countermovement Jump (CMJ) and Squat Jump (SJ), and to develop more effective training methods for volleyball players. Methods: the study involved 10 female volleyball players (U15) from KV Theranda, with an average height of 157.0 cm and weight of 48.8 kg. Body height and composition were measured using Tanita BC 545 N Innerscan scales. CMJ and SJ performance was assessed using the My Jump 3 app and a force platform. Data were analyzed using SPSS 26, with the Shapiro-Wilks test for normality and ANOVA to evaluate differences across testing periods. Results: results indicated statistically significant improvements in CMJ performance compared to SJ (p<0.05). Factors contributing to better vertical jump performance included elastic force stored in the tendons during the eccentric phase and arm swing momentum. The difference between CMJ and SJ was approximately 70%, attributed to arm swing technique and tendon elasticity. Conclusion: CMJ demonstrated a clear advantage over SJ, largely due to elastic energy in the tendons and arm swing. The findings highlight the need for further research to distinguish between the effects of arm technique and tendon elasticity and to explore their individual contributions to jump performance.