This is one of the mechanisms by which creatine is thought to work, as it increases a cell's fluid volume, which may then promote cell growth.

However, my research indicates that muscle fibers within a muscle can function differently from one another even if they don't have separate heads. For example, during my research I noted that the upper rectus abdominis and lower rectus abdominis function differently.

Joints are designed primarily to function in their mid-range of motion, but they also need activity using their full range of motion in order to stay healthy and maintain their current range.

The serape effect was a term coined to describe the diagonal prestretch of four pairs of muscles (rhomboids, serratus anterior, external obliques, and internal obliques) that occurs when rotating the shoulders and hips in opposite directions. The pre-stretch of these four pairs of muscles creates a snap-back effect (like snapping a rubber-band), which increases force production and movement efficiency in rotational actions such as throwing or kicking

your power is initiated by the larger, stronger muscle groups in the central part of your body, whereas the smaller muscles of your extremities are used in fine movements and coordination (i.e., skills)