Major Muscles and Actions Involved
The erector spinae is contracted isometrically to stabilize the spine. In the hip joint the gluteus maximus and the upper hamstrings are involved in hip joint extension. In this action the trunk moves backward with the axis in the hip joint.
Stabilization of the spine is very important in most lifting exercises. When the spine is stabilized, it is held in its proper alignment while some activity such as execution of an exercise or sports skill, takes place. An example of this is executing a jump, squat or overhead press with the spine held in place.
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