![]() One of the reasons given for this preference is that the active component of muscle, the actin-myosin system, appears to behave as a sliding filament model in which the adjacent actin and myosin muscle filaments slide in between one another. ![]() ![]() ![]() The process of muscle contraction is central to all fitness, strength and sports training, yet there are many aspects of this apparently well-known phenomenon that are not adequately understood even at a more popular level.įor a start, even though muscles are stated to lengthen during eccentric conditions, muscles can only “contract” or “relax.” I have intentionally placed the term “contract” within parentheses, because scientists to day consider that it is far more appropriate to refer to muscle action rather than muscle contraction.
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