TY - GEN
T1 - Sex-related difference in muscle deoxygenation responses between aerobic capacity-matched elderly men and women
AU - Takagi, Shun
AU - Kime, Ryotaro
AU - Niwayama, Masatsugu
AU - Osada, Takuya
AU - Murase, Norio
AU - Sakamoto, Shizuo
AU - Katsumura, Toshihito
N1 - Funding Information:
The authors are grateful for revision of this manuscript by Andrea Hope. This study was supported in part by Grant-in-Aid for scientific research from Japan Society for the Promotion of Science (246298) to S.T.
Publisher Copyright:
© Springer Science+Business Media, New York 2016.
PY - 2016
Y1 - 2016
N2 - Muscle O2 dynamics during ramp cycling exercise were compared between aerobic capacity-matched elderly men (n=8, age 65±2 years) and women (n=8, age 66±3 years). Muscle O2 saturation (SmO2) and relative change in deoxygenated (Δdeoxy-Hb) and total hemoglobin concentration (Δtotal-Hb) were monitored continuously during exercise in the vastus lateralis (VL) and gastrocnemius medialis (GM) by near infrared spatial resolved spectroscopy. SmO2 was significantly higher during exercise in women than in men in VL, but not in GM. In VL, Δdeoxy-Hb and Δtotal-Hb were significantly higher in men than in women, especially during high intensity exercise. However, no significant difference was observed in Δdeoxy-Hb or Δtotal-Hb in GM. Sex-related differences in muscle deoxygenation response may be heterogeneous among leg muscles in elderly subjects.
AB - Muscle O2 dynamics during ramp cycling exercise were compared between aerobic capacity-matched elderly men (n=8, age 65±2 years) and women (n=8, age 66±3 years). Muscle O2 saturation (SmO2) and relative change in deoxygenated (Δdeoxy-Hb) and total hemoglobin concentration (Δtotal-Hb) were monitored continuously during exercise in the vastus lateralis (VL) and gastrocnemius medialis (GM) by near infrared spatial resolved spectroscopy. SmO2 was significantly higher during exercise in women than in men in VL, but not in GM. In VL, Δdeoxy-Hb and Δtotal-Hb were significantly higher in men than in women, especially during high intensity exercise. However, no significant difference was observed in Δdeoxy-Hb or Δtotal-Hb in GM. Sex-related differences in muscle deoxygenation response may be heterogeneous among leg muscles in elderly subjects.
KW - Aging
KW - Cycling exercise
KW - Muscle oxygen dynamics
KW - Near infrared spectroscopy
KW - Regional difference
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U2 - 10.1007/978-1-4939-3023-4_7
DO - 10.1007/978-1-4939-3023-4_7
M3 - Conference contribution
C2 - 26782195
AN - SCOPUS:84958569022
SN - 9781493930227
T3 - Advances in Experimental Medicine and Biology
SP - 55
EP - 61
BT - Oxygen Transport to Tissue XXXVII
A2 - Elwell, Clare E.
A2 - Leung, Terence S.
A2 - Harrison, David K.
PB - Springer New York LLC
T2 - 42nd Annual Meeting of International Society on Oxygen Transport to Tissue
Y2 - 28 June 2014 through 3 July 2014
ER -