In Praise of RPE

"Rate of Perceived Exertion," that is. And after a particularly exhausting weekend, this topic feels quite apt

Initially, I'd planned to publish an essay today on heart rate monitors, the HRV metric (“heart rate variability”), and “Zone 2” training — which is clearly, as I type that out, way too much for one newsletter. And as the latter is sure to appear on the forthcoming Top Fitness Trends of 2023 article that I'm preparing for you, we'll return to the topic …