Question

2) Determine whether the following statements are true or false regarding the actions at the hip and knees as an individual begins to elevate himself from a squatting to a standing position. Justify your answer.

a) The iliopsoas muscle is moving from a “more elongated” to a “more shortened” position. True or False? Why?

b) The gluteus maximus is concentrically active. True or False? Why?

c) The hamstrings are likely inactive throughout this portion of the movement. True or False? Why?

d) Both the hip and knee are moving into increased amounts of extension. True or False?

Answer 1

a) false

Iliopsoas gets shortened on squating and on standing it elongates

b) - true

As you rise up from your squat, the muscles lengthened in the downward phase are activated concentrically.

They provide force for upward momentum as they fight against the force of gravity.

Their rate of activation will maintain ideal joint angles and prevent injury from a lateral or medial rotation of the lower extremities.

The gluteus maximus and hamstring muscles start from the pelvis

c) false

Hamstrings is short during squat and it elongates on standing

d) True

Extention occurs at knee joint on standing as well as at the hip joint

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