My son is 10 and was diagnosed with DMD at 5 yrs old. He is still ambulatory and in fact quite active. He can't run as fast or for as long as his peers, and shows some upper body weakness but for the most part functions like a healthy child...so so grateful. He wears leg braces at night but has no other limitations and is on low dose prednisone. He has been complaining of pain in his legs and oth…