TY - JOUR
T1 - Transient increase in femoral arterial blood flow to the contralateral non-exercising limb during one-legged exercise
AU - Yoshizawa, Mutsuko
AU - Shimizu-Okuyama, Shizuyo
AU - Kagaya, Atsuko
N1 - Funding Information:
Acknowledgments This research was supported by ‘‘Academic Frontier Project,’’ 2004, at Japan Women’s College of Physical Education (project leader, A. Kagaya).
PY - 2008/7
Y1 - 2008/7
N2 - We studied the effect of exercise intensity and duration on blood flow to the non-exercising leg during one-legged dynamic knee extension. Femoral arterial blood flow (FBF) to the non-exercising leg, blood pressure (BP), and heart rate (HR) were monitored during one-legged dynamic knee extension exercise at 15, 30, and 45% maximal voluntary contraction (MVC) in seven healthy females. There was an interaction between exercise intensity and duration for FBF and FVC (P < 0.01). During the initial phase of contralateral leg exercise at all intensities, FBF and femoral vascular conductance (FVC) of non-exercising leg increased, and the increase was larger at higher intensities (P < 0.01). After initial vasodilatation, FBF and FVC decreased to baseline, which suggests the vasoconstriction. However, FBF and FVC gradually increased during exercise at 15% MVC. We conclude that transient vasodilatation at the onset of exercise is followed by gradual change to vasoconstriction in non-exercising limb during dynamic one-legged exercise and these changes are exercise intensity- and duration-dependent.
AB - We studied the effect of exercise intensity and duration on blood flow to the non-exercising leg during one-legged dynamic knee extension. Femoral arterial blood flow (FBF) to the non-exercising leg, blood pressure (BP), and heart rate (HR) were monitored during one-legged dynamic knee extension exercise at 15, 30, and 45% maximal voluntary contraction (MVC) in seven healthy females. There was an interaction between exercise intensity and duration for FBF and FVC (P < 0.01). During the initial phase of contralateral leg exercise at all intensities, FBF and femoral vascular conductance (FVC) of non-exercising leg increased, and the increase was larger at higher intensities (P < 0.01). After initial vasodilatation, FBF and FVC decreased to baseline, which suggests the vasoconstriction. However, FBF and FVC gradually increased during exercise at 15% MVC. We conclude that transient vasodilatation at the onset of exercise is followed by gradual change to vasoconstriction in non-exercising limb during dynamic one-legged exercise and these changes are exercise intensity- and duration-dependent.
KW - Blood pressure
KW - Exercise duration
KW - Exercise intensity
KW - Heart rate
KW - Ultrasound Doppler
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U2 - 10.1007/s00421-008-0740-8
DO - 10.1007/s00421-008-0740-8
M3 - Article
C2 - 18425531
AN - SCOPUS:44249087352
SN - 1439-6319
VL - 103
SP - 509
EP - 514
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
IS - 5
ER -
