Crunches are so old school, and planks are effective, but totally boring. To get the killer side abs of your dreams, forget snooze-worthy, repetitive moves—and bust out your yoga mat instead. (Tone up and chill out with our Flat Belly Yoga routine!)
Apparently, the trick to nabbing a not-so-common core may just be a regular yoga practice. “Yoga is all about integration and using your center line,” says Lyons Den Power Yoga co-founder and instructor Bethany Lyons. “All of the movements come from a strong core and solid foundation.” Try adding these seven poses to your weekly workout routine.