Choose Full-Body Exercises
If you're looking for killer abs, don't waste your time focusing solely on crunches, since they tone just one muscle group and exacerbate bad posture, especially if you sit with a rounded spine at a desk all day. Instead focus on full-body exercises, like squat to overhead press. Not only do these types of exercises save time by working multiple body parts while engaging your core, they also do so without the posture-wrecking position of a rounded spine. For more moves, check out our video on ab exercises with Jennifer Aniston's yoga trainer Mandy Ingber.