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Article

The Relationship between Stretching Intensity and Changes in Passive Properties of Gastrocnemius Muscle-Tendon Unit after Static Stretching

1
Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata 950-3198, Japan
2
Department of Rehabilitation, Kyoto Kujo Hospital, 10 Karahashirajoumoncho, Minami-ku, Kyoto 601-8453, Japan
3
Department of Physical Therapy, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata City, Niigata 950-3198, Japan
4
Graduate School of Medicine, Kyoto University, 53 Kawara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
5
Institute of Rehabilitation Science, Tokuyukai Medical Corporation, 3-11-1 Sakuranocho, Toyonaka, Osaka 560-0054, Japan
6
Kansai Rehabilitation Hospital, Tokuyukai Medical Corporation, 3-11-1 Sakuranocho, Toyonaka, Osaka 560-0054, Japan
*
Author to whom correspondence should be addressed.
Sports 2020, 8(11), 140; https://doi.org/10.3390/sports8110140
Received: 1 September 2020 / Revised: 18 October 2020 / Accepted: 20 October 2020 / Published: 23 October 2020
(This article belongs to the Special Issue Performance and Physical Fitness Effect of Training and Exercise)
This study aimed to investigate the relationship between relative or absolute intensity and changes in range of motion and passive stiffness after static stretching. A total of 65 healthy young adults voluntarily participated in this study and performed static stretching of the plantar flexor-muscle for 120 s. Dorsiflexion range of motion and passive torque during passive dorsiflexion before and after stretching were assessed. We measured the passive torque at a given angle when the minimum angle was recorded before and after stretching. The angle during stretching was defined as the absolute intensity. Dorsiflexion range of motion before stretching was defined as 100%, and the ratio (%) of the angle during stretching was defined as the relative intensity. A significant correlation was found between absolute intensity and change in passive torque at a given angle (r = −0.342), but relative intensity and range of motion (r = 0.444) and passive torque at dorsiflexion range of motion (r = 0.259). A higher absolute intensity of stretching might be effective in changing the passive properties of the muscle-tendon unit. In contrast, a higher relative intensity might be effective in changing the range of motion, which could be contributed by stretch tolerance. View Full-Text
Keywords: static stretching; range of motion; passive torque; stretching intensity static stretching; range of motion; passive torque; stretching intensity
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MDPI and ACS Style

Fukaya, T.; Nakamura, M.; Sato, S.; Kiyono, R.; Yahata, K.; Inaba, K.; Nishishita, S.; Onishi, H. The Relationship between Stretching Intensity and Changes in Passive Properties of Gastrocnemius Muscle-Tendon Unit after Static Stretching. Sports 2020, 8, 140. https://doi.org/10.3390/sports8110140

AMA Style

Fukaya T, Nakamura M, Sato S, Kiyono R, Yahata K, Inaba K, Nishishita S, Onishi H. The Relationship between Stretching Intensity and Changes in Passive Properties of Gastrocnemius Muscle-Tendon Unit after Static Stretching. Sports. 2020; 8(11):140. https://doi.org/10.3390/sports8110140

Chicago/Turabian Style

Fukaya, Taizan, Masatoshi Nakamura, Shigeru Sato, Ryosuke Kiyono, Kaoru Yahata, Kazuki Inaba, Satoru Nishishita, and Hideaki Onishi. 2020. "The Relationship between Stretching Intensity and Changes in Passive Properties of Gastrocnemius Muscle-Tendon Unit after Static Stretching" Sports 8, no. 11: 140. https://doi.org/10.3390/sports8110140

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