ABSTRACT

In the preceding chapters, many molecular and physiological properties of contracting muscles are explained on the basis of the hybrid model. In this chapter, I consider other salient problems that cannot easily be resolved on the basis of the swinging cross-bridge/lever-arm theories, but that can be accounted for by the hybrid model. It is impossible to know and to analyse all the properties and characteristics of contracting muscles under isometric or isotonic contraction conditions (steady states or transients). Moreover, some experimental results probably do not depend on the mode of force generation. In this context, it should be noted that most authors of unconventional models claim that their approach can explain many fundamental properties of contracting muscles. As an illustrative example, Jarosh (2008) wrote: ‘This paper provides a comprehensive explanation of striated muscle mechanics and contraction on the basis of filament rotations…. The basic phenomena of muscle physiology… are explained and interpreted with the help of the model experiments’.