@Kasenfitness shares one of her favorite bodyweight exercises, side kick throughs, and we're obsessed.
Start on all fours; hands shoulder-width, knees hip-width, toes planted, and maintain a neutral spine. Turn your outside foot in the direction you're about to face at the same time, extend your alternating leg through to a straight leg position with a flexed heel. Open up your chest as you draw a bow across at shoulder height.
Return back to center and alternate side to side. Repeat 20x for 3-4 rounds.