TY - JOUR
T1 - Estimate of muscle-shortening rate during locomotion
AU - Lindstedt, S. L.
AU - Hoppeler, H.
AU - Bard, K. M.
AU - Thronson, H. A.
PY - 1985
Y1 - 1985
N2 - All skeletal muscle can produce roughly the same maximal cross-sectional force; however, the power (energy·time-1) required to develop and maintain that force increases with increasing contraction velocity. Thus the rate of muscle tension development may be of primary importance in setting the energy demand of contracting muscle. We have estimated the rate of muscle shortening during terrestrial locomotion in mammals as a function of body mass. The rate of muscle shortening of the knee extensors is much faster in small than large mammals, scaling in proportion to the -0.23 power of mass. This exponent suggests a constant body size-independent relation among skeletal muscle: O2 consumption, mitochondria content, myosin ATpase activity, and in vivo shortening velocity.
AB - All skeletal muscle can produce roughly the same maximal cross-sectional force; however, the power (energy·time-1) required to develop and maintain that force increases with increasing contraction velocity. Thus the rate of muscle tension development may be of primary importance in setting the energy demand of contracting muscle. We have estimated the rate of muscle shortening during terrestrial locomotion in mammals as a function of body mass. The rate of muscle shortening of the knee extensors is much faster in small than large mammals, scaling in proportion to the -0.23 power of mass. This exponent suggests a constant body size-independent relation among skeletal muscle: O2 consumption, mitochondria content, myosin ATpase activity, and in vivo shortening velocity.
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U2 - 10.1152/ajpregu.1985.249.6.r699
DO - 10.1152/ajpregu.1985.249.6.r699
M3 - Article
C2 - 4073290
AN - SCOPUS:0022335609
SN - 0363-6119
VL - 18
SP - R699-R703
JO - American Journal of Physiology - Regulatory Integrative and Comparative Physiology
JF - American Journal of Physiology - Regulatory Integrative and Comparative Physiology
IS - 6
ER -