1: Improve core strength with these exercises recommended by personal trainers.

2: Forget traditional sit-ups! Try these core-strengthening moves instead.

3: Planks, Russian twists, and bicycle crunches exceed sit-ups for a stronger core.

4: Target all core muscles with these effective exercises suggested by personal trainers.

5: Ditch the sit-ups and focus on these three moves for a stronger core.

6: Strengthen your core with planks, Russian twists, and bicycle crunches.

7: Personal trainers reveal three superior exercises for a stronger core than sit-ups.

8: Enhance core strength with these expert-recommended exercises over sit-ups.

9: Swap sit-ups for planks, Russian twists, and bicycle crunches for a stronger core.

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