D oing pull-ups—even a single one—is a sign of more than just arm strength. Pull-ups engage a number of muscles in the body, ...

Bodybuilder Erin Stern, who won two Figure Olympia titles, shared a back and shoulders workout using only one machine.

Pull your shoulder blades slightly down and back. Activate your core by tilting your ... the underhand grip lets your biceps help more than they do when you use an overhand grip. If you’re building up ...