Goblet Box Squat

Hold the bell at your chest, elbows tight, bell off your body. Squat back to a box, lean back slightly at the bottom — heels down, core firing — then stand all the way up: knees back, quads and glutes squeezed. Start with a high box and lower it over time. The bell in front teaches your core to hold you upright; the box teaches you where the bottom is.