Core strength exercises for seniors, from trainer Michael Betts. Try 3 bed-position tests to see if your core is top-tier after 65.

Core training has always been part of military PT and fitness testing. From crunches to sit-ups, flutter kicks, leg tucks and plank poses, the U.S. military uses many exercises to test core strength.

If it’s not enough that steeplechase champion Emma Coburn incorporates core activation exercises into her warmup routine, maybe we can convince you. It’s no secret that core workouts promote better ...