Hi Sandra 77 - I agree with the others above - it is likely to be your back...but you have to make sure you have rehabbed the hamstrings properly.

The innocuous nature of the injuries - like turning right when running (everyone does that in a race) says to me that something in your body is not working right and is putting pressure on you sciatic nerve or hamstrings...you haven't said you have a confirmed tear via scan or U/S...

Personally, i think you need to see someone who can review how your body works as you stand on one leg and then the other and whether your muscles are firing in a nice coordinated way.

Who knows, it might actually be your thoracic spine or neck causing issues! I know that when i run, it is my neck that is the problem and causes all sorts of mischief in my back, legs, muscles etc!

marathons - you are nuts! An incredible effort! I am not built to run marathons, maybe watch movie marathons

Cheers