How to do: Squat with Chains

Step-by-step instructions

1. 1To set up the chains, begin by looping the leader chain over the sleeves of the bar. The heavy chain should be attached using a snap hook. Adjust the length of the lead chain so that a few links are still on the floor at the top of the movement.
2. 2Begin by stepping under the bar and placing it across the back of the shoulders. Squeeze your shoulder blades together and rotate your elbows forward, attempting to bend the bar across your shoulders. Remove the bar from the rack, creating a tight arch in your lower back, and step back into position. Place your feet wide for more emphasis on the back, glutes, adductors, and hamstrings. Keep your head facing forward.
3. 3With your back, shoulders, and core tight, push your knees and butt out and you begin your descent. Sit back with your hips as much as possible. Ideally, your shins should be perpendicular to the ground. Lower bar position necessitates a greater torso lean to keep the bar over the heels. Continue until you break parallel, which is defined as the crease of the hip being in line with the top of the knee.
4. 4Keeping the weight on your heels and pushing your feet and knees out, drive upward as you lead the movement with your head. Continue upward, maintaining tightness head to toe, until you have returned to the starting position.

Photos & base instructions from the open-source Free Exercise DB (public domain).