I made it through the first 28 minute run this week, but had really bad calf pain afterwards. After a lot of googling, I had convinced myself I'd damaged my achilles tendon, and was worried I'd have to stop C25K until I'd got it checked out as it's one thing you're not supposed to keep running with. I was gutted, just 5 runs away from graduation.
After a bit more research I realised it was probably just a minor problem with one of my calf muscles, so rested it for a couple of days and used ibuprofen gel in case there was any inflammation.
I reckon I did the damage because there had been a lot of rain before my run, and conditions were pretty slippery, so I probably lost control on landing a few times. So far I've been doing my running round the edge of the field next to our house as I'm a bit self-conscious as a new runner. The edges of the field are mainly pretty solid, but a few patches were soft and muddy on Monday.
So today I plucked up courage and went running on the roads round our village, and was amazed at how much easier it was! Much more grip and control on landing, and without putting any more effort in I was going faster: I did 5.14km today including the warm up and cool down walks, compared to 4.50km on Monday.
Nearly there now, just 4 more runs to go!