Aging Affects Spatial Distribution of Leg Muscle Oxygen Saturation During Ramp Cycling Exercise

  • Shun TakagiEmail author
  • Ryotaro Kime
  • Norio Murase
  • Tsubasa Watanabe
  • Takuya Osada
  • Masatsugu Niwayama
  • Toshihito Katsumura
Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 789)


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.



 The authors are grateful for revision of this manuscript by Andrea Hope. We also thank Miwako Tanabe, Yuki Takahashi, Chie Hamanaka, Toshimichi Nakazawa, and Tae Minegishi for their helpful technical assistance. This study was supported in part by Grant-in-Aid for JSPS fellows from Japan Society for the Promotion of Science to S.T.


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Shun Takagi
    • 1
    Email author
  • Ryotaro Kime
    • 1
  • Norio Murase
    • 1
  • Tsubasa Watanabe
    • 1
  • Takuya Osada
    • 1
  • Masatsugu Niwayama
    • 2
  • Toshihito Katsumura
    • 1
  1. 1.Department of Sports Medicine for Health Promotion, Faculty of MedicineTokyo Medical UniversityTokyoJapan
  2. 2.Department of Electrical and Electronic Engineering, Faculty of EngineeringShizuoka UniversityShizuokaJapan

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