In cerebral palsy (CP) muscles are often shortened so much that they restrict joint range of motion and the muscles themselves are weak. Thus, ‘shortness’ and ‘weakness’ are two important needs that clinicians must address.
For people with a physical disability, activity is a lifestyle. It's something that can start in physical therapy, but it really is something that has to be carried over into their everyday lives. What has happened over the years is we're understanding the importance of mobility.