Abstract:Muscle fatigue may be due to a failure in excitation‐contraction coupling or an increase of ATP by products and NO. E‐c coupling alterations occur earlier and metabolic alterations take place later. We investigated these possibilities in frog skeletal muscle by continuous high frequency stimulation and different periods of repetitively stimulations. We judged the extent of e‐c or metabolic possibilities by releasing Ca2+ with 5 mM caffeine prior and immediately after fatigue.Continuously 60 Hz electric stimula… Show more
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