We had a spike in temperature today and I noticed that my heart rate was higher in relation to the amount of power I was putting out at the time. For example, my heart rate at 200W is usually around 135 but today in the heat I had to stay around 175W for the same heart rate. I understand that this is to be expected because the body has to work to cool it off and put out power at the same time. My question has to do with the impact on training quality.
Because I have to lower my Watts to stay in my Zone 2 heart rate parameters does it reduce the amount of training stress I’m putting on my body from a cycling stand point? In other words, am I getting less out of my endurance ride because I’m doing it at 175W instead of my regular 200W or is heat stress and training stress similar enough that my body will adapt the same way. I hope this makes sense. It’s is just something I was pondering during my ride and hoping you guys might have the answer.