It is a good, symmetrical and balanced position though this position cannot be maintained for a long time.
The subject will therefore shift his weight in a swaying movement in order to prevent fatigue and to maintain a good circulation in the postural muscles of the legs when standing.
By alternating the main support from one leg to another, the muscles become periodically unloaded and relaxed.
The pelvic inclination is about 60°.
Fatigue Posture:
It is asymmetrical or sagging posture. This position s relaxed and can be maintained for a long time as most of the body’s joints are in semi- flexion
The load on the muscles will decrease and the energy expenditure is 10 % less than easy posture.
The pelvic inclination decreases due to posterior tilting of the pelvis.
Rigid Posture:
It is called normal stalling posture or posture of attention. It doesn’t mean normal posture. This position cannot be assumed for a long time as most of body’s joints are in extension. Therefore, the load will increase on the joints and muscles and the energy expenditure is 20% more than in the easy posture.
The pelvic inclination increases due to the anterior tilting of the pelvis.
