Primary
Quadriceps
Secondary
Hip flexors
Equipment
Box
Difficulty
Intermediate
Type
Squat
See how Sissy Squat to Box could fit a workout
The example below shows one possible placement. Your purchased plan is built from your assessment, and Ely checks every exercise before approving it.
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This page is not medical advice or a rehabilitation protocol. Ely's personal review applies to purchased workout plans and does not replace an in-person assessment by a licensed healthcare professional.
The sissy squat to box uses a box behind you as a depth target and safety net, making the challenging sissy squat movement more accessible. The box catches you at your end range so you can build confidence and strength before progressing to full range sissy squats. Adjust box height to match your current ability level.
When to use it
Use as a sissy squat progression.
Who it's for
Those building up to full sissy squats.
Touch the box but do not sit on it—this is a depth marker, not a resting point. Keep your hips extended throughout and let only your knees bend. Lower the box height as you get stronger to progressively increase range of motion.
Browse all quadriceps exercises
Also targets: hip flexors
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Stand in front of a box or bench.
Rise up on your toes.
Lean back while bending your knees.
Keep your hips extended in a straight line.
Lower until you touch the box behind you.
Use your quads to drive back to standing.
The box provides a depth target.
Adjust box height for difficulty.
Keep hips extended throughout.
Great progression for full sissy squat.
For general fitness, start Sissy Squat to Box with 1-2 light, controlled sets and increase only when the movement remains comfortable. This is not rehabilitation dosage; use the frequency and progression given by your licensed healthcare professional for an injury or surgery.
Sitting back on the box.
Changing your back position during the Sissy Squat to Box can alter the movement and make the load harder to control. Brace your midsection and keep the torso position called for by the exercise.
Bending at the hips.
Losing hip position during the Sissy Squat to Box changes the loading pattern and can reduce the intended work for your Quadriceps. Keep your hips aligned with the setup cues and move only through the range you can control.
Not controlling the descent.
Squatting patterns like the Sissy Squat to Box coordinate the hips, knees, and feet. Keep those positions consistent and use a range you can control while your Quadriceps carries the intended load.
Using arms for assistance.
Your foot position during the Sissy Squat to Box determines how force transfers through your body. Keep your feet flat with weight distributed evenly — losing contact with the ground means you're losing power and stability.
Those building up to full sissy squats.
These ranges illustrate ways to organize training. They are not an individual prescription. Adjust them for the exercise, your experience, and the rest of your program.
Heavier loads can be useful for developing maximum strength. The range shown is an example, and the load must match your current technique and capacity.
Muscle growth can occur across different loads and repetition ranges. This example is not a uniquely effective zone; your overall program and effort also matter.
This is an example of a longer set. A repetition target alone does not establish joint safety or whether the exercise is appropriate for you.
Example: 3-4 sets of 8-12 reps. Rest 90s.
Background for resistance exercises: the 2026 ACSM position stand covers healthy adults, and a load-comparison review found similar muscle growth across loads in studies using sets taken to muscular failure. These findings do not validate every exercise-specific range shown here or require training to failure.
This is one example of how Sissy Squat to Box could sit inside a complete workout. Your plan may use different movements after Ely checks your assessment.
Sample workout
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Frequently Asked Questions About the Sissy Squat to Box
The Sissy Squat to Box primarily targets the Quadriceps, making it an effective exercise for quadriceps development. Secondary muscles worked during the Sissy Squat to Box include Hip flexors, providing additional training stimulus. Stabilizer muscles engaged include Core, Calves.
Our library labels Sissy Squat to Box as intermediate. That category is not an individual assessment. Review the setup, movement instructions, and safety notes, and seek qualified guidance if you are unsure how to perform it.
The programming section shows examples for Sissy Squat to Box. The appropriate amount depends on your current ability, the exercise, and your other training. The listed ranges are not an individual prescription or a guarantee of a particular outcome.
The main equipment listed for Sissy Squat to Box is a box. Check the instructions for any additional support, anchor, bench, rack, or clear space needed. The equipment label alone does not confirm that your home setup is suitable.
Good alternatives to the Sissy Squat to Box include: Sissy Squat, Leg Extension. These exercises target similar muscle groups as the Sissy Squat to Box and can be used as substitutes based on your equipment availability, gym setup, or training preferences.