Time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.

<h4>Objectives</h4>The purpose of this study was to examine the time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.<h4>Methods</h4>Fourteen healthy men (20.9 ± 0.7 years, 169.1...

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Autores principales:	Kosuke Takeuchi, Kazunori Akizuki, Masatoshi Nakamura
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/470365c9cd26402ebb61fa1b96658433
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spelling	oai:doaj.org-article:470365c9cd26402ebb61fa1b966584332021-12-02T20:08:15ZTime course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.1932-620310.1371/journal.pone.0257367https://doaj.org/article/470365c9cd26402ebb61fa1b966584332021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0257367https://doaj.org/toc/1932-6203<h4>Objectives</h4>The purpose of this study was to examine the time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.<h4>Methods</h4>Fourteen healthy men (20.9 ± 0.7 years, 169.1 ± 7.5cm, 61.6 ± 6.5kg) received static stretching for 60 seconds at two different intensities based on the point of discomfort (100%POD and 120%POD) of each participant, in random order. To evaluate the time course of changes in the flexibility of the hamstrings, the knee extension range of motion (ROM), passive torque at end ROM, and muscle-tendon unit stiffness were measured pre-stretching, post-stretching, and at both 10 and 20 minutes after static stretching.<h4>Results</h4>For both intensities, ROM and passive torque at pre-stretching were significantly smaller than those at post-stretching (p < 0.01 in both intensities), 10 minutes (p < 0.01 in both intensities), and 20 minutes (p < 0.01 in both intensities). The muscle-tendon unit stiffness at pre-stretching was significantly higher than that at post-stretching (p < 0.01), 10 minutes (p < 0.01), and 20 minutes (p < 0.01) only in the 120%POD, but it showed no change in the 100%POD.<h4>Conclusion</h4>The results showed that ROM and passive torque increased in both intensities, and the effects continued for at least 20 minutes after stretching regardless of stretching intensity. However, the muscle-tendon unit stiffness of the hamstrings decreased only after static stretching at the intensity of 120%POD, and the effects continued for at least 20 minutes after stretching.Kosuke TakeuchiKazunori AkizukiMasatoshi NakamuraPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 9, p e0257367 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kosuke Takeuchi Kazunori Akizuki Masatoshi Nakamura Time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.
description	<h4>Objectives</h4>The purpose of this study was to examine the time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.<h4>Methods</h4>Fourteen healthy men (20.9 ± 0.7 years, 169.1 ± 7.5cm, 61.6 ± 6.5kg) received static stretching for 60 seconds at two different intensities based on the point of discomfort (100%POD and 120%POD) of each participant, in random order. To evaluate the time course of changes in the flexibility of the hamstrings, the knee extension range of motion (ROM), passive torque at end ROM, and muscle-tendon unit stiffness were measured pre-stretching, post-stretching, and at both 10 and 20 minutes after static stretching.<h4>Results</h4>For both intensities, ROM and passive torque at pre-stretching were significantly smaller than those at post-stretching (p < 0.01 in both intensities), 10 minutes (p < 0.01 in both intensities), and 20 minutes (p < 0.01 in both intensities). The muscle-tendon unit stiffness at pre-stretching was significantly higher than that at post-stretching (p < 0.01), 10 minutes (p < 0.01), and 20 minutes (p < 0.01) only in the 120%POD, but it showed no change in the 100%POD.<h4>Conclusion</h4>The results showed that ROM and passive torque increased in both intensities, and the effects continued for at least 20 minutes after stretching regardless of stretching intensity. However, the muscle-tendon unit stiffness of the hamstrings decreased only after static stretching at the intensity of 120%POD, and the effects continued for at least 20 minutes after stretching.
format	article
author	Kosuke Takeuchi Kazunori Akizuki Masatoshi Nakamura
author_facet	Kosuke Takeuchi Kazunori Akizuki Masatoshi Nakamura
author_sort	Kosuke Takeuchi
title	Time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.
title_short	Time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.
title_full	Time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.
title_fullStr	Time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.
title_full_unstemmed	Time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.
title_sort	time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/470365c9cd26402ebb61fa1b96658433
work_keys_str_mv	AT kosuketakeuchi timecourseofchangesintherangeofmotionandmuscletendonunitstiffnessofthehamstringsaftertwodifferentintensitiesofstaticstretching AT kazunoriakizuki timecourseofchangesintherangeofmotionandmuscletendonunitstiffnessofthehamstringsaftertwodifferentintensitiesofstaticstretching AT masatoshinakamura timecourseofchangesintherangeofmotionandmuscletendonunitstiffnessofthehamstringsaftertwodifferentintensitiesofstaticstretching
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Time course of changes in the range of motion and muscle-tendon unit stiffness of the hamstrings after two different intensities of static stretching.

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