Why doesn’t our body collapse under the effect of gravity like a rag doll?
It is because of the permanent contraction of certain muscles (deep muscles) which ensure the fixation of the bony parts around the joints. This permanent contraction corresponds to the muscle tone that is responsible for posture.
This posture tone allows for balance, both when standing still and in movement. It constitutes an interface for movement; in fact, the placement and maintenance of certain segments (head, trunk, limbs) serve as a reference point for the organization of movements, and muscle tone promotes the necessary adjustments for all movements. The control of this posture consists of adjusting the position of the body according to the forces exerted by gravity.
When the individual is healthy and pain-free, he or she organizes himself or herself differently in relation to gravity from one individual to another. The idea of postural training is to use the constraints of different postures, with or without the addition of unstable elements, movements to make cards to be moved, in order to recreate the conditions for a correct balance by limiting the possible compensations, but respecting your singularity as an athlete.