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Base of Support (BOS) in Physiotherapy

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The base of support means the area supported beneath the object. Whenever the base of support is more the stability will be more. 


Greater the BOS lower the COG of any object.

For example, the fundamental position of standing the BOS is lesser than the lying, so COG in the standing position it is in the higher level whereas in the lying posture it will be just near to the ground as a result lying posture is more stable than any other fundamental position and also it can be maintained for the longer period. The stability is directly proportional to BOS and inversely proportional to COG.

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