There are only so many hours in the day. Unless you’re a pro runner, fitting in back-to-back training days with hour-plus runs can be quite daunting. But what if we told you a little secret: you can ...

Over the course of every marathon plan, your long-run distance extends gradually over training so you build stamina and resiliency for the 26.2 miles of race day. For example, if you use the Runner’s ...