5x12 minutes Sweetspot in a 90 minute workout. Went in thinking it wasn't going to be too bad. Holy ****... Legs were screaming and heart rate was so high. With only 3 minutes rest in between sets I was pushing the HR way higher than it should have been. According to Training peaks I set a new threshold heart rate which is... interesting. Had to turn down the difficulty about 3% to survive the last 1.5 sets.
I came back into training thinking I had under performed in my fitness assessment, but now that I'm doing the workouts some of them are damn hard. They weren't this hard last year when i followed this plan. Maybe I should have eased a bit more into base training..
At least the weightloss is going well.