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Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players
Background and Objectives: Asymmetries between the lower limbs were evaluated by both researchers and practitioners as they seem to be related to the occurrence of injuries and the effect on performance. The purposes of this study were to (a) detect asymmetries of the lower limbs using a unilateral...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10608550/ https://www.ncbi.nlm.nih.gov/pubmed/37893467 http://dx.doi.org/10.3390/medicina59101749 |
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author | Michailidis, Yiannis |
author_facet | Michailidis, Yiannis |
author_sort | Michailidis, Yiannis |
collection | PubMed |
description | Background and Objectives: Asymmetries between the lower limbs were evaluated by both researchers and practitioners as they seem to be related to the occurrence of injuries and the effect on performance. The purposes of this study were to (a) detect asymmetries of the lower limbs using a unilateral jump (single-leg countermovement jump (SLCMJ)) and 505 agility test, and (b) examine asymmetry effects on fitness (acceleration, speed, squat jump, Illinois agility test), in U16 youth male soccer players. Materials and Methods: Twenty U16 soccer players performed an SLCMJ and a 505 test to calculate the asymmetry index. They also performed the above fitness tests. The difference between the lower limbs was tested using the paired samples t-test (dominant vs. non-dominant). The correlations between the asymmetries of the lower extremities with the performance indicators were tested using the Pearson’s correlation test. The level of significance was set at p < 0.05. Results: The lower limbs differed significantly in the SLCMJ and 505 tests (p < 0.05). The only correlation was between the asymmetry in SLCMJ and performance in SJ (r = −0.641, p = 0.002). Asymmetries did not affect performance on most fitness tests. Conclusions: The two asymmetry tests identified asymmetries in different limbs. This indicates the variability in asymmetries and the need for specialized tests depending on the kinematic chain. The asymmetries observed should be eliminated using individualized training programs so that athletes are protected from injuries and from the possible negative impact on performance. Also, the detection of asymmetries in developmental age offers a greater time period for their elimination before the athlete enters professional sports. |
format | Online Article Text |
id | pubmed-10608550 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-106085502023-10-28 Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players Michailidis, Yiannis Medicina (Kaunas) Article Background and Objectives: Asymmetries between the lower limbs were evaluated by both researchers and practitioners as they seem to be related to the occurrence of injuries and the effect on performance. The purposes of this study were to (a) detect asymmetries of the lower limbs using a unilateral jump (single-leg countermovement jump (SLCMJ)) and 505 agility test, and (b) examine asymmetry effects on fitness (acceleration, speed, squat jump, Illinois agility test), in U16 youth male soccer players. Materials and Methods: Twenty U16 soccer players performed an SLCMJ and a 505 test to calculate the asymmetry index. They also performed the above fitness tests. The difference between the lower limbs was tested using the paired samples t-test (dominant vs. non-dominant). The correlations between the asymmetries of the lower extremities with the performance indicators were tested using the Pearson’s correlation test. The level of significance was set at p < 0.05. Results: The lower limbs differed significantly in the SLCMJ and 505 tests (p < 0.05). The only correlation was between the asymmetry in SLCMJ and performance in SJ (r = −0.641, p = 0.002). Asymmetries did not affect performance on most fitness tests. Conclusions: The two asymmetry tests identified asymmetries in different limbs. This indicates the variability in asymmetries and the need for specialized tests depending on the kinematic chain. The asymmetries observed should be eliminated using individualized training programs so that athletes are protected from injuries and from the possible negative impact on performance. Also, the detection of asymmetries in developmental age offers a greater time period for their elimination before the athlete enters professional sports. MDPI 2023-09-29 /pmc/articles/PMC10608550/ /pubmed/37893467 http://dx.doi.org/10.3390/medicina59101749 Text en © 2023 by the author. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Michailidis, Yiannis Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players |
title | Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players |
title_full | Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players |
title_fullStr | Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players |
title_full_unstemmed | Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players |
title_short | Relation of Jump and Change of Direction Inter-Limb Asymmetries with Fitness in Youth Male Soccer Players |
title_sort | relation of jump and change of direction inter-limb asymmetries with fitness in youth male soccer players |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10608550/ https://www.ncbi.nlm.nih.gov/pubmed/37893467 http://dx.doi.org/10.3390/medicina59101749 |
work_keys_str_mv | AT michailidisyiannis relationofjumpandchangeofdirectioninterlimbasymmetrieswithfitnessinyouthmalesoccerplayers |