Kirsten Ferguson taught me ‘runner’s math,’ surviving side cramps and running form hacks. Plus, she shares a 20-minute speed ...

We've rounded up our favorite full-body muscle power moves that activate several muscle groups (wuads, hammies, abs, delts...you get it) and melt fat. Related: 6 Full-Body Dumbbell Moves Ready to get ...

The body is very good at reminding us of this, giving us a niggle in the shoulders or dull back pain whenever we've been still for too long. The best way to tackle these issues is by doing mobility ...