Elbow-to-Knee Decline Side Plank

Seated Diagonal Knee Raise on Bench

Seated Legs Circle Over Bench

Seated Alternate In-Out Leg Raise Over Bench

Lying Raised Shoulders Windshield Wiper

Kneeling Stay-Forward Ab Wheel Rollout

Butterfly Twist

Side Plank Raise

Knee In-and-Out Crunch

Lying Straight Leg Reverse Crunch