Squat · Machine · Learn first
Leg press
Sit in a 45° sled with your back and hips flat on the pad. Feet about shoulder-width in the middle of the platform, toes slightly out.

- 1Lower until the knees pass about 90°, and stop before the hips peel off the pad.
- 2Knees track over the toes. Heels stay down.
- 3Press through the whole foot until the knees are almost straight. Don't lock them.
Easy to miss: Going so deep the low back rounds off the pad, or snapping the knees straight.