Standard CPR is performed with the person in supine position. Prone CPR or reverse CPR is CPR performed on a person lying on their chest, by turning the head to the side and compressing the back.
Non-spinal structural causes of weak legs may include sacroiliac joint pain syndromes and piriformis syndrome. Non-sciatica related sources of weakness in the legs may include diabetes, peripheral neuropathy and various circulatory and neurological conditions.
Muscle atrophy, often seen in people in wheelchairs, can lead to leg weakness. The power and ability to move one's legs stems from the interaction of two processes. These are the nerve signal that is sent to the muscles from the brain and passes via the spinal cord, and the muscle's intrinsic power to contract. Any interruption in this pathway in the lower limb can result in leg weakness. As such, leg weakness can be caused by a muscle disease or a nerve disease.