Box Squat with Chains

Performed with chains for accommodating resistance, this variation primarily targets your Quadriceps, with support from Abductors, Adductors, Calves, Glutes, Hamstrings, Lower Back. It requires barbell and is best suited to expert lifters.

Expert level · Equipment: Barbell · Compound · Push

Primary muscles: Quadriceps Secondary muscles: Abductors, Adductors, Calves, Glutes, Hamstrings, Lower Back

How to perform Box Squat with Chains

Step 1. Begin in a power rack with a box at the appropriate height behind you. Typically, you would aim for a box height that brings you to a parallel squat, but you can train higher or lower if desired.
Step 2. To 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.
Step 3. Begin 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 wider for more emphasis on the back, glutes, adductors, and hamstrings, or closer together for more quad development. Keep your head facing forward.
Step 4. With your back, shoulders, and core tight, push your knees and butt out and you begin your descent. Sit back with your hips until you are seated on the box. Ideally, your shins should be perpendicular to the ground. Pause when you reach the box, and relax the hip flexors. Never bounce off of a box.
Step 5. Keeping the weight on your heels and pushing your feet and knees out, drive upward off of the box as you lead the movement with your head. Continue upward, maintaining tightness head to toe.

Frequently asked questions

What is the primary benefit of adding chains to a box squat?

Chains provide accommodating resistance, increasing the load as you stand up to match your strength curve. This develops explosive power and helps lifters overcome sticking points at the top of the movement.

Which muscle groups are primarily targeted during this exercise?

The box squat with chains primarily targets the quadriceps. The box forces a complete stop of momentum, requiring the quads to work harder to initiate the upward phase from a dead stop.

What is a common mistake to avoid when using the box?

Avoid rocking your torso or bouncing off the box to create momentum. Maintain total core tension and sit down controlled, ensuring the weight stays centered over your midfoot before standing.

How should a beginner approach this movement for the first time?

Beginners should master the standard box squat with a barbell before adding chains. Once form is consistent, add light chains that fully deload on the floor at the bottom of the rep to ensure stability.

What is the recommended set and rep range for building power?

For explosive power, perform 5 to 8 sets of 2 to 3 reps using 50-60% of your max weight plus chain resistance. Focus on maximum concentric speed while maintaining a controlled descent to the box.

Sample sets & reps for Box Squat with Chains

Strength: 4-5 sets × 3-5 reps, 2-3 min rest. 80-90% 1RM, RPE 8-9.
Hypertrophy: 3-4 sets × 6-10 reps, 90s-2 min rest. 70-80% 1RM, RPE 7-8.
Power / explosiveness: 5-6 sets × 2-3 reps, 2-3 min rest. 60-75% 1RM, max bar speed.

Pick the scheme that matches your goal. Beginners should start at the lower end of every range; progress weight only when you hit the upper end of the rep range with one or two reps in reserve.

Related Quadriceps exercises

All Fours Quad Stretch — stretch
Alternate Leg Diagonal Bound — other
Backward Drag — other
Bear Crawl Sled Drags — sled
Bench Jump — bodyweight

See all Quadriceps exercises →

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