I know it’s great for me and that it will feel good. I feel a terrible temptation to dog along at 60–65 percent. But in spinning class I always get up in the high-endurance range; indeed, that’s what spinning is all about. Other types of classes do the same thing. Or consider a demanding bike ride or hike, like the hike I described taking in Colorado. Most of us don’t have a serious hiking opportunity in the backyard, but there are lots of ways to skin the high-endurance cat, and not all of them involve sucking in someone else’s exhaust and being yelled at in the gym.
