I am hoping someone can help. I have recently started back and the gym after a sprain. I injured my ankle on the treadmill and after my trip to a&e was advised to have a look at the trainers I was wearing. I visited a sports shop that do a gait diagnostic and was advised that I seriously over pronate so purchased some support trainers. After a gym session, on the treadmill I felt like I'd tweaked a muscle in my buttocks and thought it would go away in a few days. If felt a bit like a twang in the muscle if that makes sense! Since then whenever I've tried to increase my speed or perform sprints I've had pain down the outside of my right leg. Is this the trainers or did I do something more than pull a muscle? Just looking for ideas and advice on how to overcome this!