I am reading Rippetoe, and I came across the following statements. I am learning how to squat, but I don't understand what is meant by the following:
The squat’s stretch-shortening cycle is important for three reasons:
- The stretch reflex stores energy in the viscoelastic components of the muscles and fascia, and this energy gets used at the turnaround out of the bottom.
- The stretch tells the neuromuscular system that a contraction is about to follow. This signal results in more contractile units firing more efficiently, enabling you to generate more force than would be possible without the stretch reflex.
- Because this particular loaded stretch is provided by the lowering phase of the squat (which uses all of the muscles of the posterior chain over their full range of motion), the subsequent contraction recruits many more motor units than would be recruited in a different exercise.