Crunches and sit-ups have always been the go-to bodyweight exercises for people looking to work their abs, but they're not your only option, and there are certainly more enjoyable ways to train your ...

Nike Training Club – 20 Minute Workouts – Season 1 offers a series of intense and effective exercise routines designed to maximize fitness in just 20 minutes. Each episode focuses on different aspects ...

Add Yahoo as a preferred source to see more of our stories on Google. Looking for a quick ab workout to fire up your core? This seven-minute intense ab challenge targets your lower abs with no ...

One popular fitness expert shares the best home ab workout and 7 intense lower ab exercises, for a combination that hits your entire core.