Treadmills are pretty much plug-and-play devices for a bevy of fitness endeavors, but they can start to get out of whack over extended use — and we’re not talking about their part-time position as a ...

As someone who has run on dozens of treadmills for nearly 800 miles this year, I can mostly tell you what to expect from a run on a ‘mill. The main differences usually fall in the margins — size of ...