Fatigue and Sport

In the last few days Ross and I've been riding our gravel bikes around an area near Cape Town. It'd be interesting because we end up having discussions about not only the metrics on Ross's pedaling power meters, which was always very interesting. And he still even he doesn't understand all the metrics coming out of that. But one of the interesting things was how our heart rates changed over the time that we had that time. So I thought, well, it'd be a good chance to look into the subject of fatigue and particularly fatigue and sport.