Aging affects spatial distribution of leg muscle oxygen saturation during ramp cycling exercise

Shun Takagi*, Ryotaro Kime, Norio Murase, Tsubasa Watanabe, Takuya Osada, Masatsugu Niwayama, Toshihito Katsumura

*この研究の対応する著者

研究成果: Conference contribution

抄録

We compared muscle oxygen saturation (SmO2) responses in several leg muscles and within a single muscle during ramp cycling exercise between elderly men (n = 8; age, 65 ± 3 years; ELD) and young men (n = 10; age, 23 ± 3 years; YNG). SmO2 was monitored at the distal site of the vastus lateralis (VLd), proximal site of the vastus lateralis (VLp), rectus femoris (RF), vastus medialis (VM), biceps femoris (BF), gastrocnemius lateralis (GL), gastrocnemius medialis (GM), and tibialis anterior (TA) by near-infrared spatial resolved spectroscopy. During submaximal exercise, significantly lower SmO2 at a given absolute work rate was observed in VLd, RF, BF, GL, and TA but not in VLp, VM, and GM in ELD than in YNG. In contrast, at all measurement sites, SmO2 at peak exercise was not significantly different between groups. These results indicate that the effects of aging on SmO2 responses are heterogeneous between leg muscles and also within a single muscle. The lower SmO2 in older men may have been caused by reduced muscle blood flow or altered blood flow distribution.

本文言語English
ホスト出版物のタイトルAdvances in Experimental Medicine and Biology
ページ157-162
ページ数6
789
DOI
出版ステータスPublished - 2013
外部発表はい

出版物シリーズ

名前Advances in Experimental Medicine and Biology
789
ISSN(印刷版)00652598

ASJC Scopus subject areas

  • 生化学、遺伝学、分子生物学(全般)
  • 医学(全般)

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