You can say it like this in English:

“My daughter has been diagnosed with cerebral palsy. She is 14 years old now. I believe that riding a bicycle would be very beneficial for strengthening her leg muscles. I would also really like her to be able to ride a bike outside in the fresh air.”

If you’d like, I can also help you write this for a doctor, school, or insurance request. 

You can say it like this in English: “My daughter has been diagnosed with cerebral palsy. She is 14 years old now. I believe that riding a bicycle would be very beneficial for strengthening her leg muscles. I would also really like her to be able to ride a bike outside in the fresh air.” If you’d like, I can also help you write this for a doctor, school, or insurance request.