Speed Box Squat
The Speed Box Squat is a intermediate compound movement that activates 4 muscle groups simultaneously. It primarily targets the Quadriceps, making it one of the more efficient exercises in RepStack's 873-exercise database.
Starting position
Ending position
Muscles Worked
The quadriceps handles the primary load during this movement. The calves and glutes and hamstrings assist as stabilizers throughout the range of motion.
How to Speed Box Squat
- 1
Attach bands to the bar that are securely anchored near the ground. You may need to choke the bands to get adequate tension.
- 2
Use a box of an appropriate height for this exercise. Load the bar to a weight that still requires effort, but isn't so heavy that speed is compromised. Typically, that will be between 50-70% of your one rep max.
- 3
Position the bar on your upper back, shoulder blades retracted, back arched and everything tight head to toe. This will be the starting position.
- 4
Unrack the bar and position yourself in front of the box. Sit back with your hips until you are seated on the box, ensuring that you descend under control and don't crash onto the surface.
- 5
Pause briefly, and explode off of the box, extending through the hips and knees.
Common Mistakes
- • Brace your core before initiating the movement — maintain tension throughout the entire range of motion.
- • Control the eccentric (lowering) phase for at least 2 seconds to maximize muscle fiber recruitment.
- • Grip the bar evenly on both sides — even a small offset shifts the load asymmetrically.
- • Keep the bar path as vertical as possible over your base of support.
- • Avoid locking out aggressively at the top — stop just short of full extension to keep tension on the muscle.
Similar Exercises
Frequently Asked Questions
What muscles does the Speed Box Squat work?
The Speed Box Squat primarily works the Quadriceps. Secondary muscles include the Calves, Glutes, Hamstrings, which assist during the movement.
Is the Speed Box Squat good for beginners?
The Speed Box Squat is rated intermediate. Beginners should build foundational strength with simpler movements first, then progress to this exercise once comfortable with the movement pattern.
What equipment do I need for the Speed Box Squat?
You need barbell to perform the Speed Box Squat. Most commercial gyms will have this available.
Track your estimated one-rep max over time. Use our 1RM calculator to see where you stand, or let RepStack compute it automatically after every set.
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