As muscles become weaker and you find moving your joints more difficult, joints are at risk for becoming locked in one position, known as a contracture. Having correct posture may help the prevention of contractures in the back, feet and ankles while you are walking. While sitting, it is important to make sure your posture is in good alignment, with weight bearing even on both sides of the body. Your feet and legs should be in proper alignment, with good positioning and proper support. A proper seating system in your wheelchair, giving support of spinal and pelvic symmetry and spinal extension, is crucial. There may be surgical options to help maintain the alignment of feet and legs, if that is appropriate for you.