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

Abstract 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 intensit...

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Autores principales:	Kosuke Takeuchi, Kazunori Akizuki, Masatoshi Nakamura
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0b9c5c8b62ef4ade9ad8896fead305ac
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spelling	oai:doaj.org-article:0b9c5c8b62ef4ade9ad8896fead305ac2021-11-08T10:48:33ZAssociation between static stretching load and changes in the flexibility of the hamstrings10.1038/s41598-021-01274-72045-2322https://doaj.org/article/0b9c5c8b62ef4ade9ad8896fead305ac2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01274-7https://doaj.org/toc/2045-2322Abstract 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.Kosuke TakeuchiKazunori AkizukiMasatoshi NakamuraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kosuke Takeuchi Kazunori Akizuki Masatoshi Nakamura Association between static stretching load and changes in the flexibility of the hamstrings
description	Abstract 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.
format	article
author	Kosuke Takeuchi Kazunori Akizuki Masatoshi Nakamura
author_facet	Kosuke Takeuchi Kazunori Akizuki Masatoshi Nakamura
author_sort	Kosuke Takeuchi
title	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_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_sort	association between static stretching load and changes in the flexibility of the hamstrings
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0b9c5c8b62ef4ade9ad8896fead305ac
work_keys_str_mv	AT kosuketakeuchi associationbetweenstaticstretchingloadandchangesintheflexibilityofthehamstrings AT kazunoriakizuki associationbetweenstaticstretchingloadandchangesintheflexibilityofthehamstrings AT masatoshinakamura associationbetweenstaticstretchingloadandchangesintheflexibilityofthehamstrings
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Association between static stretching load and changes in the flexibility of the hamstrings

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