Cerebral palsy is an injury to the brain, but what we find is that it has a lot of effects on how you use your muscles.

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.

Early interventions for CP should be based on the strongest possible scientific evidence for benefit and should have the smallest possible risk of harm. In the US, early intervention (EI) is a system of services available under the age of 3, to support infants and toddlers with developmental problems and their families as they interact with and care for their child.