If You Want to Strengthen Your Core, Try Celeb Trainer Gunnar Peterson's 5-Move Workout
Celebrity trainer Gunnar Peterson — yup, the one who trains the Kardashians, Kate Beckinsale, and the Los Angeles Lakers — wants to help you improve your core workout and make it as effective as possible. "Your core wraps around your entire body and supports you," Gunnar told POPSUGAR. He explained …