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Association between static stretching load and changes in the flexibility of the hamstrings

The purpose of the present study was to examine the association between static stretching load and changes in the flexibility of the hamstrings. Twelve healthy men received static stretching for 60 s at two different intensities based on the point of discomfort (100%POD and 120%POD intensity), in ra...

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Autores principales: Takeuchi, Kosuke, Akizuki, Kazunori, Nakamura, Masatoshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8571324/
https://www.ncbi.nlm.nih.gov/pubmed/34741110
http://dx.doi.org/10.1038/s41598-021-01274-7
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author Takeuchi, Kosuke
Akizuki, Kazunori
Nakamura, Masatoshi
author_facet Takeuchi, Kosuke
Akizuki, Kazunori
Nakamura, Masatoshi
author_sort Takeuchi, Kosuke
collection PubMed
description The purpose of the present study was to examine the association between static stretching load and changes in the flexibility of the hamstrings. Twelve healthy men received static stretching for 60 s at two different intensities based on the point of discomfort (100%POD and 120%POD intensity), in random order. To assess the flexibility of the hamstrings, the knee extension range of motion (ROM). Passive torque at end ROM, and muscle–tendon unit stiffness were measured before and after stretching. The static stretching load was calculated from the passive torque throughout static stretching. The knee extension ROM and passive torque at end ROM increased in both intensities (p < 0.01). The muscle–tendon unit stiffness decreased only in the 120%POD (p < 0.01). There were significant correlations between the static stretching load and the relative changes in the knee extension ROM (r = 0.56, p < 0.01) and muscle–tendon unit stiffness (r = − 0.76, p < 0.01). The results suggested that the static stretching load had significant effects on changes in the knee extension ROM and muscle–tendon unit stiffness of the hamstrings, and high-intensity static stretching was useful for improving the flexibility of the hamstrings because of its high static stretching load.
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spelling pubmed-85713242021-11-09 Association between static stretching load and changes in the flexibility of the hamstrings Takeuchi, Kosuke Akizuki, Kazunori Nakamura, Masatoshi Sci Rep Article The purpose of the present study was to examine the association between static stretching load and changes in the flexibility of the hamstrings. Twelve healthy men received static stretching for 60 s at two different intensities based on the point of discomfort (100%POD and 120%POD intensity), in random order. To assess the flexibility of the hamstrings, the knee extension range of motion (ROM). Passive torque at end ROM, and muscle–tendon unit stiffness were measured before and after stretching. The static stretching load was calculated from the passive torque throughout static stretching. The knee extension ROM and passive torque at end ROM increased in both intensities (p < 0.01). The muscle–tendon unit stiffness decreased only in the 120%POD (p < 0.01). There were significant correlations between the static stretching load and the relative changes in the knee extension ROM (r = 0.56, p < 0.01) and muscle–tendon unit stiffness (r = − 0.76, p < 0.01). The results suggested that the static stretching load had significant effects on changes in the knee extension ROM and muscle–tendon unit stiffness of the hamstrings, and high-intensity static stretching was useful for improving the flexibility of the hamstrings because of its high static stretching load. Nature Publishing Group UK 2021-11-05 /pmc/articles/PMC8571324/ /pubmed/34741110 http://dx.doi.org/10.1038/s41598-021-01274-7 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Takeuchi, Kosuke
Akizuki, Kazunori
Nakamura, Masatoshi
Association between static stretching load and changes in the flexibility of the hamstrings
title Association between static stretching load and changes in the flexibility of the hamstrings
title_full Association between static stretching load and changes in the flexibility of the hamstrings
title_fullStr Association between static stretching load and changes in the flexibility of the hamstrings
title_full_unstemmed Association between static stretching load and changes in the flexibility of the hamstrings
title_short Association between static stretching load and changes in the flexibility of the hamstrings
title_sort association between static stretching load and changes in the flexibility of the hamstrings
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8571324/
https://www.ncbi.nlm.nih.gov/pubmed/34741110
http://dx.doi.org/10.1038/s41598-021-01274-7
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