I’ve logged hundreds of miles of indoor running, mostly on good treadmills ... which not only offers excellent hardware but access to Peloton’s best-in-class guided classes.

These 4 indoor walking workouts boost calorie burn, build endurance, and strengthen muscles—no treadmill required.

Who are indoor walking challenges best for? While indoor walking challenges are pretty much universally beneficial, they're particularly suited to certain individuals. "While anyone can benefit ...