Dang

On Sunday I started out on a 20+ minuter - but after 15 mins I had to stop and walk.
Achilles and calves.
I was convinced my achilles were about to explode so walking felt like the right thing to do
Happily today (2 days later) they're not bad at all.

I will probably go for a run this evening - but in my old shoes. I'll be pleased if I can do 30 mins with just the feeling that I'm a bit out of breath rather than in agony of biomechanical proportions.
If I do feel OK I guess I'll continue to run in the old trainers (but toe-striking as such as possible) and go for diddly runs in the merrells to bring up my endurance. It feels like a step backwards to go back into the padded shoes frankly and I don't like it.