A 16-year-old male basketball player arrives at the clinic with chronic bilateral lower leg pain. He reports a sharp cramping pain that begins while running and resolves 10-20 minutes after he stops exercising. He reports occasional paresthesias, and numbness to the extremity. He also reports mild swelling and tightness in both legs only during exercise. He denies any known trauma to the extremity. Physical exam is unremarkable.


What is the best initial treatment for the underlying cause of this patient’s condition?