Summary
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1.
In a group of female rats the fast m. plantaris was overexerted by denervating the m. gastrocnemius and m. soleus. Part of these rats were trained systematically on a motor-driven endless belt set at an inclination.
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2.
Isometric contraction characteristics were studied in these and in control rats.
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3.
Muscle weight and tetanic muscle force of the experimental group both increased to about 130% of that of control rats of the same age.
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4.
Training had no additional effect on the mechanical characteristics studied in the muscles of the denervated rats.
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5.
The results indicated that, in the m. plantaris of the denervated group, no changes occurred in the twitch contraction time nor in the tetanic force per unit of weight.
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6.
A comparison is made with the findings on slow muscles as reported in the literature.
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Binkhorst, R.A. The effect of training on some isometric contraction characteristics of a fast muscle. Pflugers Arch. 309, 193–202 (1969). https://doi.org/10.1007/BF00586797
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DOI: https://doi.org/10.1007/BF00586797