Recommended Sets and Reps: Perform 3 sets of 10 to 15 reps. Rest for 45 to 60 seconds between sets. How to Use Chair Exercises to Flatten Belly Pooch After 656254a4d1642c605c54bf1cab17d50f1eUse these four exercises as a circuit. Keep the ab moves controlled: Knee tucks, flutter kicks, and scissor kicks work best when the legs move smoothly, and the torso stays steady. Knee tucks, flutter kicks, and scissor kicks work best when the legs move smoothly, and the torso stays steady. A chair routine can give your abs direct work while still making the session feel active.