Originally Posted by
TromboneAl
Check out my HR on these two rides (same route):
The top one is at what I call my Optimal Cruise speed. The lower one is with my wife, and it was very slow. 122 vs. 101 average HR (I'm 59 and my max HR is 160). 13.5 MPH vs 10.9 MPH. How did I fare? The slow ride was much harder. I felt much better after the medium pace ride.
Which is why people buy tandems. Like we did.