Passive stretching is useful if you have a paralysis or soft-tissue injury. The motion or stretch is performed by an outside factor. This may either be a partner or special traction equipment.
If joint range of motion (ROM) is not maintained following problems such as a stroke or spinal cord injury, the musculotendinous unit will shorten and joint motion will be affected.
Stretch Reflex Of Passive Stretching
Passive stretching should be a slow, steady movement that gently lengthens the soft tissues. Careful movement of the tissues will help prevent pain. Ballistic motion or bouncing is not advised for extremely weak or paralyzed muscles, as rapid movement may activate the stretch reflex.
Rapid movement will cause pain and increase the possibility of muscle or tendon rupture.