The functional consequences of lower-limb disability include diminished independence, fitness, work capacity, and recreational/employment opportunities. Physical performance and quality of life can be limited by upper-limb pain resulting from overuse injury in manual wheelchair users. Chronic conditions such as carpal tunnel syndrome, rotator cuff injuries, elbow/shoulder tendinitis, and osteoarthritis have been associated with long-term manual wheelchair use. Shoulder or wrist joint pain has been reported in 64-73 % of those who use manual wheelchairs with spinal cord injuries. In the previous studies, 67 % of MWCU (Manual Wheel Chair Users) had upper-limb mononeuropathies defined by strict electrodiagnostic criteria. These conditions can decrease function and increase health care costs for the wheelchair-using population.

     In addition, ineffective biomechanics can decrease the economy of wheelchair operation and lead to excessive metabolic and cardiopulmonary demand. Investigators have identified several possible contributors to overuse injuries in MWCU, including duration of manual wheelchair use, frequency of arm use, and propulsion style kinematics. Several investigators have proposed that chronic wheelchair use creates imbalances in propulsion agonists and antagonists and that training of the antagonists may correct these imbalances, thereby reducing the potential for associated upper-limb pain.

     In addition to all of the above we want to improve the blood circulation in the lower body, which is not in motion at all the times.