A couple weeks ago, one of the trainers at my gym noticed me warming up on the treadmill, and pointed out that my feet were slightly splayed more than they should be (apparently some cyclists have this problem as well). I was told to try to keep them more center if I could, but to also find him and he would show me some stretching excercises that would help alleviate the splayed condition. Unfortunately, everytime I've seen him since then he's been working with clients.
Any idea on what muscle group may be the culprit? Even a link to appropriate stretching excercises would suffice.