So here’s my update for anyone who might have experienced a similar problem.
The pain in my groin (which I think was in the area of the abductor magnus) quickly moved to pain in my hamstrings (the area of the semitendinosus and semimembranosus) which were very tender to touch. I’ve no medical training so I’m just guessing from diagrams and where I felt the pain. However after foam rolling, stretching, icing and some isometric hamstring strengthening exercises over the following week I’m now back on track with my training plan. I’ve not yet done the hill sprints session – that comes tomorrow but I’ve coped absolutely fine with several big days out and other strength exercises with no pain or soreness whatsoever. I’ll be taking the hill sprints cautiously but i feel pretty confident I’ll be okay.
Overall I thought I had done myself some real and longterm damage and I’m amazed and perplexed at how quickly I seem to have recovered (note the cautious tone). Maybe I experienced something akin to cramp with no tear or strain. Who knows! I’m just happy to be back running again.
Thanks for all the advice and comments. Much appreciated.
Brian