I am 17. Before I used to trip once in awhile but recently i have been tripping (on flat roads) a lot in fact some times when i walk i feel like my muscles wont stretch anymore. i feel strength less only in my legs specially the muscles below my knees. In this situation the more i force myself to walk the more i trip.
i don't wear heels. my right foot twist and it is really painful if i don't bend when it happens. I never had any leg injuries like fractures.