The 7 best core exercises for a flat stomach: ACE ranks bicycle crunches top for abs
December 21, 2025, 6:45 AM. Your alarm rings 10 days before New Year’s. Instagram feeds flood with transformation promises. You want visible abs but don’t know where to start. The American Council on Exercise studied 13 ab exercises and ranked them by muscle activation. Bicycle crunches topped the list, engaging obliques and deep core more … Lire plus









