Originally Posted by
Mark E. Hurling
I keep saying this. But I guess it bears repeating for some to get the message.
Wear a heart rate monitor while you lift. My old Polar and newer Fitbit shows a range of 70%-85% range of Maximum Heart Rate* when I lift. This includes singles with 3 minutes rest between sets and includes my cooling off stretching at the end. My routines last from 50-70 minutes.
So spend less time obsessing, get under the bar, and Bob's your uncle.
EDIT:
* That's average HR as a percentage of MHR.