I'm wondering whether my recent hamstring disaster which has put me totally out of action for weeks was partly due to the TrainerRoad pedal technique sessions.
I have always had tight hamstrings - I know this from Pilates. They are under-used and inflexible, but have never caused me any real problem, so other than stretching I pretty much ignore them.
It was only when finishing the TR base month, which included quite a few "clock" intervals requiring to pull through the bottom of the stroke, that I borked the hamstring while running. Coincidence? Did I overdo the pulling? Who knows, but I'll be avoiding these when/if I resume.
EDIT: Come to think of it, the single-leg exercises also put a lot of strain on the hamstrings and did actually feel quite painful at the time.