Question

how can a change in muscle activity influence or cause a change in joint motion during a squat

Answer 1

squat is a lower body perfect exercise. They can a change in muscle activity influence due to squat perform slow and prolonged do is applied to avoid the reflex contraction from the muscle spindle and golgi tendon organ. The muscle is elongated gently and maintained for long period without pain. The golgi tendon organ protects the muscle from the stretch by firing the type ib fibers. This ib fibers further relaxes the muscle by efferent impulse. so, the muscle fiber goes for more relaxation and flexibility. Effective duration of the stretch is found out by comparing the groups stretched for 15,30 and 60 seconds muscle fibers show more flexibility than the 15 seconds stretched muscle fibers.

DURING a squat involve in change of alignment of hip joint,knee joint and ankle joint.The squat exercise exercise mainy targets the change the hip joint and muscles involve in quadriceps,hamstrings and glutes. However core strength & stability, ankle mobility, back muscles, calves and other factors play an important role when doing this exercise. During the descent of a squat, the hip and knee joints flexed while the ankle joint dorsiflexes, conversely the jip and knee joints extend and the ankle joint plantarflexes when standind up.