: Exhale on the "effort" phase (the crunch or the lift) to deepen the abdominal engagement.
: Lie on your back and reach for your heels, alternating sides to target the "side abs." : Exhale on the "effort" phase (the crunch
: Focus on slow, controlled rotation rather than speed to maximize muscle fiber recruitment in the obliques. : Exhale on the "effort" phase (the crunch
: Start in a high plank. Alternately tap your knees to the floor lightly to engage the lower abdominals without losing your spinal alignment. : Exhale on the "effort" phase (the crunch
: Sit with heels touching the floor (or lifted for a challenge) and rotate your torso from side to side.
: While holding a bridge, lift one knee toward your chest at a time. This stabilizes the core while working the posterior chain.
