Use a Seat to Get Strong
Sitting in the office or while watching TV at home, you can do “triceps dips.” Sit in a steady chair and keep your feet flat on the ground. With your hands on the armrests, raise your body up, then lower yourself back into the seat.
Or, try this: Stand and face the seat area of a steady chair with arms. With your body bent at the waist, and grasping the chair arms for support, raise and lower your upper body with your arms. You'll be doing “standing push-ups!”