Did Spencer +2 last night (6x3min @120%, anyone doing SSBMV2 will be familiar with the exquisite torture).
Something I noticed was that in the second-to-last interval, my HR hit 169, or about 97% of max. Then in the final interval, I got to about 93% before grinding to a halt 90 seconds in.
It got me thinking, is there a percentage of maxHR that you can only reach once in a session? If I reached 97% max in a ramp test or TT, I’d be able to go on a little bit further and push it up to 99+% before reaching exhaustion. But if I reach 97% and take a rest, it’s like my body won’t let me get it that high again.
I looked through some old workouts which definitely seems to back up that phenomenon. I’ve hit 96-97% a few times, but only ever once per session. Is this true for anyone or everyone else?