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Title: Time course of changes in passive properties of the gastrocnemius muscle-tendon unit during 5 min of static stretching.
Authors: Nakamura, Masatoshi
Ikezoe, Tome  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-8546-5912 (unconfirmed)
Takeno, Yohei
Ichihashi, Noriaki  kyouindb  KAKEN_id
Author's alias: 中村, 雅俊
Keywords: Ultrasonography
Passive torque
Static stretching
Muscle–tendon unit
Issue Date: Jun-2013
Publisher: Elsevier B.V.
Journal title: Manual therapy
Volume: 18
Issue: 3
Start page: 211
End page: 215
Abstract: The minimum time required for Static stretching (SS) to change the passive properties of the muscle-tendon unit (MTU), as well as the association between these passive properties, remains unclear. This study investigated the time course of changes in the passive properties of gastrocnemius MTU during 5 min of SS. The subjects comprised 20 healthy males (22.0 ± 1.8 years). Passive torque as an index of MTU resistance and myotendinous junction (MTJ) displacement as an index of muscle extensibility were assessed using ultrasonography and dynamometer during 5 min of SS. Significant differences before and every 1 min during SS were determined using Scheffé's post hoc test. Relationships between passive torque and MTJ displacement for each subject were determined using Pearson's product-moment correlation coefficient. Although gradual changes in both passive torque and MTJ displacement were demonstrated over every minute, these changes became statistically significant after 2, 3, 4, and 5 min of SS compared with the values before SS. In addition, passive torque after 5 min SS was significantly lower than that after 2 min SS. Similarly, MTJ displacement after 5 min SS was significantly higher than that after 2 min SS. A strong correlation was observed between passive torque and MTJ displacement for each subject (r = -0.886 to -0.991). These results suggest that SS for more than 2 min effectively increases muscle extensibility, which in turn decreases MTU resistance.
Rights: © 2013 Elsevier B.V.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/174105
DOI(Published Version): 10.1016/j.math.2012.09.010
PubMed ID: 23294911
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