Though the initial insult or injury to the brain that causes cerebral palsy is non-progressive, aging with cerebral palsy and lack of physical activity during critical periods of development can impact biologic and metabolic function for adults with cerebral palsy.
There are multiple factors that impact bone health, including birth weight, nutrition, medications for seizures and/or reflux, genetics, and physical activity. Targeted exercise to improve bone health in childhood can be sustained into adulthood, and childhood is the best time to promote bone health.
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.