MrC - are you running on-road or off-road? I know quite a few people who can't run on-road because the harshness of the impact is painful on joints, but who are completely proficient on off-road trails. Some trails might have weird camber, which might not be good with a dodgy hip, but if you could find some not too technical but softer off road stuff you might find that less painful?
I was running mostly off-road, but the hummocky ground is worse for my hip (and a damaged ankle). It's all pancake flat round here.
Did 10km on friday, reduced my pace a bit (normally I run about 6km, 4km of that off-road). Even my reduced pace resulted in fastest 10km since I started using Strava ('fast' being a relative term; this would be walking for zigzag).
Using Hoka shoes, so plenty of cushioning.
Used to be able to run half-marathons without hip pain (but that was nearly 20 years ago).
Couple of thoughts to, hopefully, encourage you
- running adaptation takes time and you might be well served by doing a bit less for a while and sticking with it. Of course, only you know what the impact on your hip is. After my knee op, where I was actually in pretty good shape for age(!) the surgeon view was that I'd be fine if I made sure I kept my muscles strong - quads for me - but building the support is a slow business.
- I've commented about Hoka above and I am getting used to them. However, I still prefer the much flatter ones. Cushioning is a mixed blessing that we adapt to within moments, stiffening or softening our legs to respond. Footfall and gait may be better in lower or less cushioned shoes, although again building up to use these takes time.
Hope you're able to hang in and find a way to stick with it, even as an adjuct to kayaking or cycling it's a good way to see the world.
