Areas trained: TRICEPS, CORE Technique Stand facing the back of your chair. Place your hands shoulder-width apart on the top of the chair back. Keep your arms straight and step back keeping your body in a straight line from your head to your heels. Engage your abs and bend your elbows (keeping them close to your sides) to do a press-up. Exhale, then push back up to the start position. Repeat 10-12 times.