Completed week 3 still finding it hard on my legs, calves particularly.
Took two attempts to complete week 4 run for first time.
Again it's mostly my legs that don't seem to be getting strong enough yet. It hurts towards the three minute mark and after 5 minutes I found it hard to walk for about a minute of the 'rest' stage.
Recovery afterwards is not overly long though and I don't have any muscle pain in the days after so maybe I am getting stronger.
I do go slowly with jog sometimes at least feeling slower than walking but finding the pace is tricky as too slow is harder on the legs.
After turning my ankle last week I did one session (not an 'official' one) on treadmill in hotel fitness centre while on holiday. I actually managed 3 five minute run intervals with relative comfort so was rather stunned to find week 4 runs so hard on the street,