If you use a wheelchair, poor postural alignment may be responsible for causing your back, neck, and shoulder pain. Although the purpose of your wheelchair is to provide mobility, a wheelchair can also help stabilize weak torso muscles to keep you upright when you sit. As a result, using proper posture when you are sitting in your wheelchair can prevent unnecessary backaches and muscle pain. Why You Feel Pain Generally, people tend to slump back and slide themselves forward in a wheelchair in an effort to feel more stable.