I’ve been tracking my resting heart rate. As you become more fit, your heart becomes able to pump more blood with each beat, so most people will see their resting heart rate decline with training. Fitness books suggest that there are other insights to be gleaned as well—an unexpected jump in resting heart rate may be a sign of overtraining, for example.
It’s only true in general; it doesn’t mean anything to compare resting heart rates across individuals. But I’m one of those who does see a strong effect, so it’s been fun to watch my resting heart rate decline. It’s up in the low 70s when I’m out of shape, drops into the 60s pretty quickly after I start getting some regular aerobic exercise, then gradually declines into the low 50s.
Yesterday, though, my resting heart rate was 49. Since my resting heart rate tends to get stuck in the low 50s, that was fun to see. It’s also a pretty good indication that I’m recovered from Monday’s long run.
Just two weeks to the winter solstice, so just four weeks until the days are again as long as they are now. Then things start getting better. That provides a ray of hope as I stick with the treadmill running.