MHR typically does not exceed 100 to 125 bpm, and training intensity should be between 50% and 70% maximal heart rate. Therefore, an average target heart rate (THR) falls between 65 and 91 bpm.
Arm ergometry is a preferred type of exercise training for individuals with quadriplegia. Be sure the wheelchair is locked, the hands are secured to the equipment (straps can be used for stability and balance) and the ergometer is in a fixed position. Other forms of aerobic exercise may include pushing their chair or a track chair, handcycling, and NuStep machines.
The following video shows individuals with quadriplegia engaging in aerobic exercise: https://www.youtube.com/watch?v=1CdwOe-5OaA&list=TLqFcbekj165s