It’s workouts like today that really spark my curiosity about exercise physiology.
I’ve been having a great string of workouts, and I’ve been feeling pretty sharp.
I will admit that I was feeling tired when I got up this morning, but I got a good night’s sleep. But I was looking forward to a nice long, easy cruise.
The plan called for a 2×45’/4′ rest. I decided to substitute a half marathon at the same power just to change it up a bit.
What happened in the workout was very strange. My HR started low, and just kept going up. I didn’t feel like I was working extra hard, but my HR just never plateaued.
Just look at the difference between this and the 2×45′ session I did on Sunday.
- Same power
- Same Stroke Rate
- Wildly different HR
So, what’s going on? A few theories
- Accumulated fatigue?
- Warmer today than Sunday
- Fasted vs not fasted
- Morning vs Afternoon
I’d love to understand this stuff better.