exercises that emphasize moves you make during sports and everyday life. We ll show you how to set achievable goals and work smart, rather than wasting time you d rather spend elsewhere. Twenty to 40 minutes a few times a week or even just five minutes a day is all the time you need. We ve skipped standard crunches in favor of more challenging exercises designed to buff more than one muscle group at a time. And all of the exercises can be made easier or harder, depending on your current level of core fitness.

Hide more