Masatoshi Nakamura1, Tome Ikezoe2, Satoru Nishishita3, Jun Umehara2, Misaka Kimura4, Noriaki Ichihashi2. 1. Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Japan. Electronic address: masatoshi-nakamura@nuhw.ac.jp. 2. Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan. 3. Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan; Institute of Rehabilitation Science, Tokuyukai Medical Corporation, Osaka, Japan; Kansai Rehabilitation Hospital, Tokuyukai Medical Corporation, Osaka, Japan. 4. Faculty of Bioenvironmental Science, Kyoto Gakuen University, Japan.
Abstract
PURPOSE: Generally, static stretching (SS) is the recommended intervention for a decline in the range of motion among elderly adults. However, no study has investigated the acute effects of SS on the shear elastic modulus in elderly people. The aims of the present study were to investigate the acute effects of SS on the shear elastic moduli of the medial and lateral gastrocnemius muscles and to examine the differences in these acute effects between young and elderly women. METHODS: This study included 15 healthy young women (age: 23.1 ± 3.4 years) and 15 healthy elderly women (age: 75.9 ± 2.8 years) with no history of neuromuscular disease or musculoskeletal injury involving the lower limbs. The shear elastic moduli of the medial and lateral gastrocnemius muscles (MG and LG, respectively) were measured using ultrasound shear wave elastography at 30° plantar flexion, 0°, and 20° dorsiflexion before and immediately after 5 min of SS with the knee extended. RESULTS: The shear elastic moduli of the MG and LG in all ankle position decreased after SS in both the young and elderly women, and there were no significant differences in the percent changes in the shear elastic moduli of the MG and LG at all ankle positions between the young and elderly women. CONCLUSIONS: These results suggested that 5 min of SS might be effective for decreasing shear elastic modulus in both young and elderly women and that the effects on shear elastic modulus are similar between young and elderly women.
PURPOSE: Generally, static stretching (SS) is the recommended intervention for a decline in the range of motion among elderly adults. However, no study has investigated the acute effects of SS on the shear elastic modulus in elderly people. The aims of the present study were to investigate the acute effects of SS on the shear elastic moduli of the medial and lateral gastrocnemius muscles and to examine the differences in these acute effects between young and elderly women. METHODS: This study included 15 healthy young women (age: 23.1 ± 3.4 years) and 15 healthy elderly women (age: 75.9 ± 2.8 years) with no history of neuromuscular disease or musculoskeletal injury involving the lower limbs. The shear elastic moduli of the medial and lateral gastrocnemius muscles (MG and LG, respectively) were measured using ultrasound shear wave elastography at 30° plantar flexion, 0°, and 20° dorsiflexion before and immediately after 5 min of SS with the knee extended. RESULTS: The shear elastic moduli of the MG and LG in all ankle position decreased after SS in both the young and elderly women, and there were no significant differences in the percent changes in the shear elastic moduli of the MG and LG at all ankle positions between the young and elderly women. CONCLUSIONS: These results suggested that 5 min of SS might be effective for decreasing shear elastic modulus in both young and elderly women and that the effects on shear elastic modulus are similar between young and elderly women.
Authors: Marina Maren Reiner; Markus Tilp; Gaël Guilhem; Antonio Morales-Artacho; Andreas Konrad Journal: J Sports Sci Med Date: 2022-06-01 Impact factor: 4.017
Authors: George M Pamboris; Marika Noorkoiv; Vasilios Baltzopoulos; Hulya Gokalp; Robert Marzilger; Amir A Mohagheghi Journal: PLoS One Date: 2018-05-03 Impact factor: 3.240