Key result
The slow-twitch soleus muscle demonstrated substantially longer isometric endurance than the fast-twitch plantaris and medial gastrocnemius muscles, even during arterial occlusion.
Population
Cat muscles
Comparison
Sequential stimulation to assess endurance at… vs Comparison between muscle types and circulation…
Design
Preclinical
Authors
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Supports intrinsic fiber-type endurance differences in rodent muscle; leaves open translation to human fatigue or training.
Slow-twitch muscles exhibit significantly greater isometric endurance than fast-twitch muscles, partly dependent on blood flow, with fatigue originating within the muscle itself.
Petrofsky et al. (1979) studied this question. Sequential stimulation and arterial occlusion vs. Different muscle types (soleus, medial gastrocnemius, plantaris) was evaluated on Isometric endurance (ability to sustain tensions of 3-100% of initial strength to fatigue). The slow-twitch soleus muscle demonstrated substantially longer isometric endurance than the fast-twitch plantaris and medial gastrocnemius muscles, even during arterial occlusion.
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