Place your palms on the arms of your chair and cross your legs at your ankles. Exhale, contract your abdominal muscles, and lift your buttocks and legs away from the floor. Hold yourself suspended for five to eight full breaths. Lower yourself, change the cross of your legs, and repeat the motion. If you can’t lift yourself, start with your buttocks and add the feet as you build strength. This posture strengthens your arms and lower abs.