Trainers say a handful of simple exercises—like presses, curls, and push-up variations—effectively build upper-arm strength.

Stand tall with your feet hip-width apart and grip a single dumbbell with both hands. Raise the weight overhead and straighten your arms. Brace your core and keep your ribs pulled down. Lower the ...

Try 6 chair exercises that target triceps and shoulders to help tighten sagging arms after 55, no weights needed.