These ab exercises from New York celebrity fitness trainer Terri Walsh, creator of the groundbreaking A.R.T. Method will trim and tone your midsection—and you don’t even need to get up from your chair! Do one or more of these moves every other day for best results.
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Ab Exercise 1

Sit in an armless chair facing the back of the chair, using your legs to grip the chair. Press your feet into the floor, pull your navel towards your spine and close your ribcage. Extend your arms away from your body, elbows slightly bent. Press your shoulders down to stabilize them while you rotate your ribcage side to side. Aim your elbows toward the sides of the chair. Don’t count reps, simply rotate from side to side, elbows touching the chair, for 1 to 2 minutes.
Ab Exercise 2

Stand about two steps from the chair, and facing the seat. Keeping your legs straight, bend at your waist and put both hands on the sides of the seat. Extend your right arm forward and your left leg backwards. Pull your right arm under your body to meet your left knee (try to get your arm to the outside of the knee). Repeat up to 50 reps; switch sides and repeat.
Ab Exercise 3

Sit on your chair with thumbs under your bottom, your hands gripping the sides of the chair and your elbows pointing back. Place a yoga block or rolled up towel between your knees. Lean slightly back while pulling in your navel and closing your ribcage. Extend your right toes toward the left side of the floor, then pull back, aiming the left knee toward the right shoulder. Alternate from side to side for a set of 25 to 50.