Int J Sports Med 2011; 32(7): 496-502
DOI: 10.1055/s-0031-1275297
Physiology & Biochemistry

© Georg Thieme Verlag KG Stuttgart · New York

Muscle Oxygenation and Fascicle Length During Passive Muscle Stretching in Ballet-Trained Subjects

A. Otsuki1 , E. Fujita2 , S. Ikegawa3 , M. Kuno-Mizumura1
  • 1Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
  • 2Faculty of Letters and Education, Ochanomizu University, Tokyo, Japan
  • 3Human Health Science, Tokyo Metropolitan University, Tokyo, Japan
Further Information

Publication History

accepted after revision February 14, 2011

Publication Date:
12 May 2011 (online)

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Abstract

Muscle stretching transiently decreases muscle-blood flow corresponding to a muscle extension. It may disturb a balance between muscular oxygen demand and oxygen supply to muscles and reduce muscle oxygenation. However, muscle-stretching training may improve blood circulatory condition, resulting in the maintained muscle oxygenation during muscle stretching. The aim of this study was to investigate changes in muscle-blood volume (tHb) and tissue oxygenation index (TOI) during muscle stretching determined by using near-infrared spectroscopy (NIRS) in ballet-trained (BT) and untrained (C) subjects. 11 BT women who regularly perform muscle stretching and 11 C women participated in this study. Fascicle lengths, tHb and TOI in the tibialis anterior muscle were measured during passive plantar flexion from ankle joint angles of 120° (baseline) to 140°, 160°, the maximal comfortable position without pain (CP), and the maximal position (MP). At 160°, the % fascicle-length change from baseline was significantly lower in the BT than the C group, however, for the changes in tHb and TOI the significant interaction effect between the 2 groups was not detected. On the other hand, although the increases in the fascicle length from baseline to CP and MP were greater in BT than C, the tHb and TOI reductions were comparable between groups. We concluded that it appears that BT can extend their muscles without excessive reduction in muscle-blood volume and muscle oxygenation at relatively same but absolutely greater muscle-stretching levels than C. The attenuation in these indices during high-level muscle stretching may be associated with the repetitive muscle stretching of long-term ballet training.

References

Correspondence

Dr. Mayumi Kuno-Mizumura

Graduate School of Humanities

and Sciences

Ochanomizu University

2-1-1 Otsuka Bunkyo-ku

Tokyo

Japan 112-8610

Phone: +81/3/5978 52 64

Fax: +81/3/5978 52 64

Email: mizumura.mayumi@ocha.ac.jp