I've just started running (this week) and I'm not really very good at it. On Thursday evening I ran on the treadmill at the gym. By bed time the front of my ankle hurt when I flexed or pointed my toes. It's gone away now . Did I just overdo it slightly (not difficult), do I need different shoes (Aasics - I've had 'em 5 years but only ran 8km max in them), or is it just one of those things that will get better as my fitness improves?