Notes
AIM Z1/2/3 5 min Int for 45 min
Compare - 9/9/8 - 8:21 min/mile - that time I was recovering from illness too. So I guess a reasonable comparison.
ACTUAL - Still not right after illness hence the really slow times.
HR was at top of the z2 & z3 & each time I struggled to get back to z1. (E.g. had to walk for about 1:30 after 2nd z3 interval.)