Earlier quoted context omitted.
I'm in the exact same situation as parent. Except i skipped to biking. It seems to me that Foam rollers ( or in my case just stretching on a tennis ball) are good for relieving the pain a bit after you've stopped running. But what do you suggest to stop having the pain in the first place ?
The magic stretch is the one where you lie, on your side, on the edge of a bed. Then, you drape the affected leg (the leg that is on top, not the leg you're lying on) behind you, such that your foot ends up below the level of the bed. You're basically stretching your hip farther than you could stretch it normally, since you can drape it backwards into empty space. Play with it a bit, with different angles, etc. This…
Image here: http://www.runnersworld.com/sites/default/files/rt/images/20...