Posted: 01/02/2013 at 00:03
I agree, core work will help, plus what worked for me also were walking lunges and squats, loads of them. I've mainly had achilles problems rather than upper leg problems, but would occasionally have to take time off for thigh strains, including one where I seemed to be able to feel all the vibrations going up my femoral shaft while running.
With that last one, I rested for a month or so, then started adding in walking lunges while walking round my usual running route, and standing squats. Six months on, my upper legs now feel very steely and I am running three of four 10k distances every week, with no twinges whatsoever.
My legs weren't conditioned properly before - when I started doing the walking lunges I could feel a massive burn on the inside of the thighs after doing 10 or 20 lunges, and I was wobbling while doing them - now they're pretty easy. My adductor muscles in particular have got much bigger, which is bad news as my suit trousers will now go threadbare on the inside top of the leg where my legs rub against each other. Glutes have also got harder.
I feel more confident about avoiding groin/upper leg injures now - good luck.