The Energy of Muscle Contraction. III. Kinetic Energy During Cyclic Contractions.

ABSTRACT: During muscle contraction, chemical energy is converted to mechanical energy when ATP is hydrolysed during cross-bridge cycling. This mechanical energy is then distributed and stored in the tissue as the muscle deforms or is used to perform external work. We previously showed how energy is distributed through contracting muscle during fixed-end contractions; however, it is not clear how the distribution of tissue energy is altered by the kinetic energy of muscle mass during dynamic contractions. In this study we conducted simulations of a 3D continuum muscle model that accounts for tissue mass, as well as force-velocity effects, in which the muscle underwent sinusoidal work-loop contractions coupled with bursts of excitation. We found that increasing muscle size, and therefore mass, increa

SUBMITTER: Ross SA 

PROVIDER: S-EPMC8058367 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature