Build Core Strength and Endurance Without Crunches
By Erik Taylor
Forget crunches. Build a hulk-strong core that endures the miles, swims, rides, climbs and anything else you desire with these six dynamic core exerci
Start your half marathon training with our guide to half marathon races for first-timers, half marathon training schedules, running workouts, and nutrition tips for your half marathon race day from the experts.
Jason Karp is a nationally-recognized running and fitness coach and owner of Run-Fit.