Growth‐related change in specific force but not in specific power of rat fast skeletal muscle | Zendy

de Haan A | Zendy; de Ruiter CJ | Zendy; Lind A | Zendy; Sargeant AJ | Zendy

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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.

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