Fig. 4
Main characteristics of the isometric cycles in the TP + M model. a “Length–Force” diagrams depicting the relationship between length and generated force obtained in a series of isometric contractions with length decreased from reference length L0 = Linit (at which the virtual sample generates maximum isometric force F0) to 84%L0. b Length dependence of isometric twitch temporal characteristics: TTP—time to peak twitch; t50, t70—time to 50% and 70% force decay from peak force in isometric cycles. c Length dependence of action potential duration at 90% of repolarization (APD90) in isometric cycles