I’m sure I’m not alone in having a weakness round the hips. Common in women runners, apparently.
Mine stems from having one leg longer than the other and so my left leg gets a disproportionate pounding when I run. That means tighter muscles in that leg and that hip.
The very brilliant runner’s world has some exercises on its website which are just great for hip flexibility. You’re looking for the MYRTL routine, you have to dig about a bit, though the perky nutrition women are worth listening to – watch you don’t get blinded by those dazzling white teeth though!
The guy races through them, and you need to do 10 not three, but these will be great for me and I’m going to give them a whirl. I’ll let you know how I get on.