Originally Posted by
repechage
My Dr. was more interested in recovery time, how long to get back to a resting heart rate.
Forget all what was posted, go see your Dr. maybe a sports oriented one, get a work up and know.
There was a bike shop owner around here 15 years ago, was riding in the hills above Malibu.
Heart failed. game over at 56.
Yikes, I'll make an appointment