Peloton Tread is expensive, but its mix of informative trainers, off-the-machine strength classes and handy stretching techniques make it an incredibly versatile piece of kit. Live leaderboards ...

The tread belt is well-cushioned and feels similar to running on a road. The two-speed fan is efficient and very welcome during faster runs. The Proform Pro 9000 currently has 4.1 out of five stars on ...

Plus, adds Wilcox, “You wind up doing somebody else’s workout, not yours.” Today’s treads offer tons of preprogrammed options—intervals, rolling hills, even military-style fitness tests.