Originally Posted by digibud

This time they let me continue walking until I reached 100% of my predicted (220-age) max HR. I did it with no problem. I was working hard but got there. Happily I showed no issues. I promptly left, picked up my gear and went to spinning class where I hit three or four beats above that predicted max HR on 5 occasions during the class. I was glad my doc allowed me to push to that degree during the test. I was much more confident that I was safe in doing so in spinning class. I don't let myself get that sweated up during outdoor winter rides but I'll continue to do HIIT work in spinning class.