Chair Crunches Sit tall in a chair with your feet flat on the floor. Put your hands on the sides of your head. Engaging your core, lower your chest towards your lap as far as you can. Slowly lift back to the starting position, keeping your abs clenched, then repeat continuously for 30 seconds. Elbows and Knees Sit tall in a chair with your feet on the floor and place your hands behind your head. Keeping your chest lifted, twist your torso and raise your left knee to meet your right elbow. Untwist as you place your left foot back on the ground. Repeat the motion on the opposite side. Alternate sides for 30 seconds. Seated Bicycle Pedal Sit on the edge of your chair and clutch the seat on either side of your thighs for support. Then, raise your legs into a bike-pedaling position so that both of your knees are bent, but one is raised about a foot above the other. Slowly raise the lowered knee and lower the raised knee. Continue alternating the position of your legs for 30 seconds or as long as you can. Seated Twist Sit tall in a chair with your feet flat on the floor. Hold a small weight between your hands and extend your arms so the weight is parallel to your eyes. From here, gently twist your torso to the right as far as is comfortable. Make sure you’re engaging your core, rather than your shoulders or arms. Pause, then return to starting position. Repeat on the opposite side. Continue alternating sides for 1 minute. Side Bends You’ll need an armless chair for this exercise. Sit in the chair with your feet flat on the floor facing forward. Allow your arms to hang down on both sides of your body. Then, gently bend at the waist toward your left side, extending your left arm as far towards the floor as is comfortable as you engage your core. Slowly return to starting position, keeping your abs clenched. Repeat on the right side. Continue alternating sides for 1 minute. For an added challenge, you can grip small weights in your hands during this exercise. Knee Sweeps Sit on the edge of a chair and clutch the seat on either side of your thighs for support. Lean back slightly. Raise your knees so they form a 45-degree angle with your torso. Without touching your feet to the floor, engage your core and move your legs to the left as far as you comfortably can. Then, slowly return to center, using only your core to move your legs. Repeat the exercise on the opposite side. Perform 10 reps on each side or as many as you can.