Sit on the edge of a horizontally oriented weight bench, and place a set of dumbbells on your lap. Kick the weights back, shift your shoulder blades onto the bench, and press the weights straight up.

Walk into any gym and you’ll see a parade of bicep exercises. Standing curls. Seated curls. Cables. Machines everywhere. With so many choices, which ones actually work?

The actress's former PT shares exactly how she stayed strong ...