I’ve recently started on SSB2 in attempt to regain some cycling fitness. Started off with a ramp, 247w, fine with that (well it’s not quite 320 in 2020 but again fine with that ).
Something that has surprised me is on both VO2 workouts so far (appreciate they aren’t the hardest) my HR has only got to a max of around 140 (my max is 194). They were very comfortable, I flagged as easy. HR strap is working fine and happy that I know what certain power numbers feel like so no technical issues. I have shown a different type of workout alongside to show power and HR as a comparison.
My feeling is these are introductory type sessions? Regardless, I am enjoying the sessions, balancing them with 3x weight lifting workouts per week. Progress will be slow but for now it’s about creating that consistency and getting back in the habit with training.
If you felt a lower level workout was easy, it was probably a normal HR response. Maybe also you tested a wee bit low but now you are back in the system it should dial you in (AT and AIFTPD) and it sounds like there are lots of gains to be made
Normally I would say don’t get too far over your skis in the first week of a training plan because volume will ramp up as you go and cause problems in the last couple weeks. In your case, I would say that a fitness level you have once attained comes back quickly. So if you once attained an FTP of, for example, 270W, it’s going to be easier for you to get back to that level of fitness than it might be for a newbie rider.
You should consider using the Alternates button to select a little bit more challenging VO2max & Threshold workouts next week. Maybe consider a Breakthrough VO2max workout if the Alternate workouts look achievable.