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Growth‐related change in specific force but not in specific power of rat fast skeletal muscle
Author(s) -
de Haan A,
de Ruiter CJ,
Lind A,
Sargeant AJ
Publication year - 1992
Publication title -
experimental physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 101
eISSN - 1469-445X
pISSN - 0958-0670
DOI - 10.1113/expphysiol.1992.sp003611
Subject(s) - skeletal muscle , stimulation , biophysics , chemistry , anatomy , gastrocnemius muscle , endocrinology , medicine , biology
The effect of growth on the dynamic performance of rat medial gastrocnemius muscle was studied. From approximately 1.5 to 5 months of age specific force increased by 18%. Reductions were found in both optimal stimulation frequency (from 120 to 100 Hz) and optimal shortening velocity (by 16%) indicating that the fibres became slower. Specific power did not change during growth but was obtained at a lower shortening velocity. Possible mechanisms for the observed changes are discussed.