Could it be?

When I've raced, and even Time Trialed, my threshold HR was in the 170s. I could always tell when I had reached that range, but current indications are that I must be getting more aerobically fit, as I've hit the 170s, but didn't realize it until I got home and analyzed my ride files. Seeing a max of 176bpm came as a surprise, and I had to review the actual ride graphs to find out when/where I hit that number.


I'll be doing some formal testing next week, so it'll be interesting to see if a 20 minute TT bears out what I've been seeing this week.