DDR038 Sissy Squat Machine â€“ Adjustable, stable, and ergonomic design.

DDR038 Sissy Squat Machine dimensions â€“ 40.4" L x 28.7" W x 18.6" H.

Exercises and muscles targeted

Exercise	Muscles Targeted
Sissy Squat (bodyweight)	Rectus Femoris (primary — bi-articular quad head crossing both hip and knee, maximum stretch at full depth), Vastus Lateralis (primary), Vastus Medialis (primary), Vastus Intermedius (primary), Hip Flexors (co-contraction stabiliser)
Sissy Squat — Full Depth (maximum stretch)	Rectus Femoris (maximum lengthened-position loading — the hip extension that occurs at the torso lean back simultaneously stretches the rectus femoris at both the hip and knee), All Vastus Heads (peak eccentric demand at deepest position), Tibialis Anterior (ankle stability)
Sissy Squat — Isometric Hold (bottom)	Rectus Femoris and Vastus Heads (sustained isometric at deepest knee flexion and maximum quad stretch — peak hypertrophy stimulus position), Hip Flexors (sustained co-contraction)
Sissy Squat — Slow Eccentric	Rectus Femoris (eccentric loading through the full descent arc, maximum stretch-loaded hypertrophy stimulus at the deepest position), Vastus Lateralis, Vastus Medialis (eccentric), Tibialis Anterior (ankle stability through descent)
Sissy Squat — Weighted (plate held at chest)	Rectus Femoris and Vastus Heads (same quad isolation pattern with additional plate load increasing the resistance moment through the arc), Core and Hip Flexors (increased stabilisation demand with anterior load)

The sissy squat is unique among quad exercises because the body leans backward as the knees flex, which places the rectus femoris — the bi-articular quad head that crosses both the hip and the knee — in a lengthened position at both joints simultaneously at the bottom of the movement. This dual-joint stretch produces a higher activation signal in the rectus femoris than any other quad exercise, including leg press and leg extension, making the sissy squat the most specific exercise for developing the upper quad fullness and the sweep that connects the quad to the hip. The DDR038 makes this exercise safe, controlled, and repeatable at any experience level by anchoring the lower body securely throughout the movement.

Who this machine is built for

Serious Home Gym Builders
The DDR038 at 40.4" × 28.7" × 18.6" and 73 lbs fits into any corner of a home gym that has floor space for a standard flat bench. At that footprint it delivers the only exercise that specifically stretches the rectus femoris at both the hip and the knee simultaneously — a stimulus that no other machine in a typical home gym provides regardless of how many leg press or squat machines are present.

Bodybuilders and Physique Athletes
Rectus femoris development and the upper quad fullness that creates the teardrop sweep near the hip are most directly produced by exercises that load the muscle in its most lengthened position. The sissy squat on the DDR038 achieves this at the bottom of the arc where the body leans back and the knee is fully flexed, placing the rectus femoris in maximum stretch under load. This is the primary reason bodybuilders who train quads seriously include the sissy squat alongside leg press and hack squat — it targets a lengthened position that the other machines do not reach for this specific muscle head.

Personal Trainers and Private Studios
The DDR038's compact footprint and 73 lb weight make it easy to position anywhere in a training space and reposition between client sessions. The five-position leg pad and five-position foot pad serve clients across the full height range without complex setup, and the bodyweight-primary format makes the exercise accessible during early programme phases before external load is introduced. The sissy squat on the DDR038 is also a useful assessment tool for quadriceps strength, knee stability, and lower body proprioception.

Physical Therapists and Sports Medicine Practitioners
Terminal knee extension strength and rectus femoris capacity are components of many lower limb rehabilitation programmes. The supported, anchored position on the DDR038 allows controlled progressive loading of the knee through the flexion and extension arc in a fixed body position, which removes the balance and coordination demands that floor-based sissy squat training requires during early rehabilitation stages. Exercise selection and loading must follow the clinical programme for each patient's specific condition and stage of recovery.

Athletes in Jumping and Sprint Sports
The rectus femoris is a primary contributor to the knee extension component of jumping takeoff and sprint stride extension. Developing this muscle head through the lengthened-position sissy squat stimulus adds a training quality to an athletic programme that standard bilateral squat and press machines do not provide, and the compact DDR038 makes it practical to include within a team training facility regardless of space constraints.

How to setup and use

Setting Up the DDR038 Sissy Squat

Place the DDR038 on a flat, stable floor surface. The PVC rubber base prevents floor scratching and keeps the unit from sliding during the exercise.
Set the leg pad (shin roller) to the appropriate position from the five available for your height. The roller should contact the upper shin just below the knee in the standing starting position — not mid-shin or at the ankle.
Set the foot pad to one of five positions based on the desired squat depth and your ankle mobility. A higher foot pad position reduces the effective squat depth for beginners or users with limited ankle mobility, and a lower position allows deeper descent for advanced quad stretch work.
Stand on the foot pad with feet at shoulder width and slide the shins behind the leg rollers so the rollers contact the upper shin surface.
Confirm both the shin contact and foot pad contact feel secure before beginning the set.

Performing the Sissy Squat

From the standing starting position with the body upright and the knees fully extended, begin the descent by bending the knees and allowing the body to lean backward simultaneously — the torso should lean back as the knees flex so the hips stay relatively fixed in space while the upper body drops.
Lower under control until the desired depth is reached, either the mid-range position for beginners or the full-depth position where the thighs approach the calves and the quad is maximally stretched.
Hold the bottom position for one to two seconds for hypertrophy-focused sets, feeling the quad stretch through the full thigh from the hip through to the knee.
Drive back to the starting upright position by contracting the quads and extending the knees, keeping the shin contact with the rollers throughout the return.
For weighted reps, hold a weight plate at the chest before beginning the descent. Start with very light additional load — the bodyweight sissy squat is already a significant quad stimulus at full depth for most users.

Owner's Manual

Access the complete assembly guide, parts list, and maintenance schedule below.

Download Owners Manual

Shipping & Delivery

All Dynasty Fitness equipment ships free across the 48 contiguous US states via freight carrier. If the product description says preorder, we'll send you an estimated delivery date via email.

Estimated delivery: 7–14 business days from order confirmation. You will receive a tracking number and a delivery window confirmation call before your shipment arrives. Deliveries are curbside standard, white glove delivery to room of choice is available at checkout.

Returns: Free within 30 days of delivery. Items must be in original condition and packaging. Refunds processed within 5 business days of return receipt.

Questions? Contact our team at:
📧Email: info@thedynastyfitness.com
📞Call: +1 (213)-584-0858

Need a buying guide?

Looking for one to one support before making final decision?
Feel free to contact us. Our expert support team would love to assist you.

Need Installation Help?

We have partnered with another company to help provide installation around the country. Please use the link below to see the price per machine for installation
See Installation Rates

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Save 10%

Sissy Squat DDR038

$386.00

$386.00 ~~$429.00~~ 10% off (Save$43.00 )

Commercial Grade
Pay With HFA/FSA

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The Dynasty Fitness DDR038 Sissy Squat is a compact quad isolation trainer that anchors the lower body in a fixed supported position to allow controlled deep knee flexion through the sissy squat movement, delivering direct rectus femoris and vastus muscle activation that compound squats and leg presses distribute across multiple muscle groups. By locking the shins and calves against the leg rollers and anchoring the feet against the foot pad, the DDR038 removes hip, glute, and hamstring contributions from the movement and concentrates the entire loading demand on the quadriceps through the full squat arc. A five-position leg pad adjusts the shin roller for different user heights and leg proportions, a five-position foot pad adjusts squat depth and foot support level, and a PVC rubber base keeps the unit stable on any floor surface during both bodyweight and lightly loaded reps. Built from 1.97" × 3.94" commercial-grade rectangular steel at just 40.4" × 28.7" × 18.6" and 73 lbs, the DDR038 is built for commercial gyms, personal training studios, and home gym setups where dedicated quad isolation through the sissy squat pattern is a programming priority.

Dedicated sissy squat trainer that anchors the shins, calves, and feet to isolate the quadriceps through deep knee flexion, training the rectus femoris and vastus muscles directly without hip, glute, or hamstring distribution of the load
Five-position leg pad adjustment sets the shin roller position for different user heights and leg lengths so the knee anchor point is correct for each individual's proportions, keeping the squat mechanics precise across a diverse training population
Five-position foot pad adjustment controls squat depth and foot support level, allowing beginners to limit range of motion during technique development and advanced users to maximise full-depth quad stretch for the greatest hypertrophy stimulus
Compact 40.4" × 28.7" footprint at 73 lbs fits into corner stations, small commercial areas, or home gym spaces where dedicated quad isolation equipment would otherwise be impractical

Limited time offer

Get 20% off when you order 4 or more pieces of equipment!

Exercises and muscles targeted

Exercise	Muscles Targeted
Sissy Squat (bodyweight)	Rectus Femoris (primary — bi-articular quad head crossing both hip and knee, maximum stretch at full depth), Vastus Lateralis (primary), Vastus Medialis (primary), Vastus Intermedius (primary), Hip Flexors (co-contraction stabiliser)
Sissy Squat — Full Depth (maximum stretch)	Rectus Femoris (maximum lengthened-position loading — the hip extension that occurs at the torso lean back simultaneously stretches the rectus femoris at both the hip and knee), All Vastus Heads (peak eccentric demand at deepest position), Tibialis Anterior (ankle stability)
Sissy Squat — Isometric Hold (bottom)	Rectus Femoris and Vastus Heads (sustained isometric at deepest knee flexion and maximum quad stretch — peak hypertrophy stimulus position), Hip Flexors (sustained co-contraction)
Sissy Squat — Slow Eccentric	Rectus Femoris (eccentric loading through the full descent arc, maximum stretch-loaded hypertrophy stimulus at the deepest position), Vastus Lateralis, Vastus Medialis (eccentric), Tibialis Anterior (ankle stability through descent)
Sissy Squat — Weighted (plate held at chest)	Rectus Femoris and Vastus Heads (same quad isolation pattern with additional plate load increasing the resistance moment through the arc), Core and Hip Flexors (increased stabilisation demand with anterior load)

Who this machine is built for

How to setup and use

Setting Up the DDR038 Sissy Squat

Place the DDR038 on a flat, stable floor surface. The PVC rubber base prevents floor scratching and keeps the unit from sliding during the exercise.
Set the leg pad (shin roller) to the appropriate position from the five available for your height. The roller should contact the upper shin just below the knee in the standing starting position — not mid-shin or at the ankle.
Set the foot pad to one of five positions based on the desired squat depth and your ankle mobility. A higher foot pad position reduces the effective squat depth for beginners or users with limited ankle mobility, and a lower position allows deeper descent for advanced quad stretch work.
Stand on the foot pad with feet at shoulder width and slide the shins behind the leg rollers so the rollers contact the upper shin surface.
Confirm both the shin contact and foot pad contact feel secure before beginning the set.

Performing the Sissy Squat

From the standing starting position with the body upright and the knees fully extended, begin the descent by bending the knees and allowing the body to lean backward simultaneously — the torso should lean back as the knees flex so the hips stay relatively fixed in space while the upper body drops.
Lower under control until the desired depth is reached, either the mid-range position for beginners or the full-depth position where the thighs approach the calves and the quad is maximally stretched.
Hold the bottom position for one to two seconds for hypertrophy-focused sets, feeling the quad stretch through the full thigh from the hip through to the knee.
Drive back to the starting upright position by contracting the quads and extending the knees, keeping the shin contact with the rollers throughout the return.
For weighted reps, hold a weight plate at the chest before beginning the descent. Start with very light additional load — the bodyweight sissy squat is already a significant quad stimulus at full depth for most users.

Owner's Manual

Access the complete assembly guide, parts list, and maintenance schedule below.

Download Owners Manual

Shipping & Delivery

All Dynasty Fitness equipment ships free across the 48 contiguous US states via freight carrier. If the product description says preorder, we'll send you an estimated delivery date via email.

Returns: Free within 30 days of delivery. Items must be in original condition and packaging. Refunds processed within 5 business days of return receipt.

Questions? Contact our team at:
📧Email: info@thedynastyfitness.com
📞Call: +1 (213)-584-0858

Need a buying guide?

Looking for one to one support before making final decision?
Feel free to contact us. Our expert support team would love to assist you.

Need Installation Help?

We have partnered with another company to help provide installation around the country. Please use the link below to see the price per machine for installation
See Installation Rates

Payment & Security

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Sissy Squat DDR038

$386.00

$386.00 ~~$429.00~~ 10% off (Save$43.00 )

Key Features

Five-Position Leg Pad

The shin roller adjusts to five positions along the vertical support to match users of different heights and leg lengths. The correct roller position sits just below the knee in the upright starting stance, which anchors the upper shin and keeps the knee joint in the correct alignment relative to the foot pad throughout the squat arc. Too high a roller position above the knee shifts the anchor point and changes the mechanical arc. Too low a position at mid-shin or ankle reduces the anchoring effectiveness. The five positions cover the full height range from shorter through taller users within a single compact adjustment range.

Five-Position Foot Pad

The foot pad adjusts to five positions to control the squat depth and foot elevation during the exercise. A higher foot pad position reduces the effective arc depth and suits beginners building confidence and control before progressing to full-depth sissy squats. A lower position allows the deepest squat depth for maximum rectus femoris lengthening and the greatest hypertrophy stimulus. The foot pad adjustment also accommodates different ankle mobility levels, since users with limited dorsiflexion benefit from a slightly elevated foot position that reduces the ankle demand through the descent.

Ergonomic Knee and Shin Support

The contoured leg roller provides a firm, cushioned contact surface that distributes the shin anchoring force across a broad contact area rather than concentrating it at a narrow bar contact point. This keeps the shin and knee comfortable through long sets and high-rep bodyweight work where the roller contact pressure accumulates over multiple reps. The contour of the roller matches the natural shape of the shin surface rather than presenting a flat edge that digs into the shin under load.

PVC Rubber Base and Compact Frame

The PVC rubber base pads protect the floor surface from frame contact and provide enough friction to keep the DDR038 stable on smooth floor surfaces during the exercise without requiring the unit to be bolted down or weighted with additional load. At 73 lbs the unit is light enough to reposition by hand between exercises or client sessions. The 1.97" × 3.94" rectangular steel frame provides sufficient rigidity to remain stable during high-rep sets without flexing or shifting on the floor.

Product Information
Product Name	Sissy Squat
Model	DDR038
Series	DDR Series
Product Type	Quad Isolation Sissy Squat Trainer
Primary Function	Supported sissy squat — rectus femoris and quadriceps isolation through anchored deep knee flexion
Target Muscles	Rectus Femoris (primary), Vastus Lateralis, Vastus Medialis, Vastus Intermedius (primary)
Grade	Commercial
Dimensions and Weight
Length	40.4 in (102.6 cm)
Width	28.7 in (72.9 cm)
Height	18.6 in (47.2 cm)
Net Weight	73 lbs (33.1 kg)
Capacity
Maximum Training Load	661 lbs (300 kg) — structural frame capacity
Adjustability
Leg Pad Positions	5 positions — shin roller height for user height and leg length
Foot Pad Positions	5 positions — squat depth control and ankle mobility accommodation
Frame and Construction
Frame Tubing	1.97" × 3.94" commercial-grade rectangular steel
Base	PVC rubber pads — floor protection and stability
Finish	Powder-coated steel, welded frame
Indoor Use Only	Yes

Q: What makes the sissy squat different from a leg extension for quad development?
A: A leg extension trains the quadriceps through knee extension in a seated position where the hip is flexed, which shortens the rectus femoris at the hip end before the exercise even begins. The sissy squat trains the quadriceps through knee flexion in a position where the hip extends as the body leans back, which stretches the rectus femoris at both the hip and knee simultaneously at the bottom of the movement. This dual-joint stretch produces a stronger activation signal in the rectus femoris than the leg extension's single-joint loading. The two exercises are complementary rather than redundant because each targets the quad from a mechanically different position.

Q: Is the sissy squat safe for the knees?
A: The sissy squat does place the knee in a high flexion position under load, which is not appropriate for everyone. Users with existing knee conditions, patellar tendon issues, or those recovering from knee injuries should consult a clinician before using this machine. For healthy knee joints, the bodyweight sissy squat through a controlled range of motion is a well-established quad strengthening exercise. The DDR038's five-position foot pad allows the range of motion to be limited during early use, allowing progression from a comfortable partial depth before advancing to the full squat arc.

Q: How much weight should I use on the DDR038?
A: Most users will find the bodyweight sissy squat at full depth a sufficient quad challenge, particularly when done slowly with a pause at the bottom. If additional load is used, it is typically a single weight plate held at the chest — starting with 10 to 25 lbs and progressing only when full-depth bodyweight reps with a controlled slow eccentric can be completed cleanly. The 661 lb figure in the specifications is the structural frame capacity, not a practical loading recommendation for the sissy squat exercise itself.

Q: How do I know which leg pad position to use?
A: Stand on the foot pad in the starting upright position and set the leg pad so the shin roller contacts the upper shin just below the kneecap. The roller should feel firmly engaged against the shin without pressing on the kneecap itself or sitting so low that it contacts the mid-shin. Test through one or two slow bodyweight reps to confirm the roller stays in contact throughout the descent without shifting position, then proceed to working sets.

Q: Can I use the DDR038 without holding onto anything?
A: Yes, the sissy squat is a freestanding exercise on the DDR038 — no external handle or support is required once the feet and shins are anchored. Some beginners use a wall or rack upright to assist balance during their first few sessions while developing the movement pattern, then progress to the unassisted freestanding version as confidence develops. The contoured leg rollers and stable PVC rubber base keep the unit secure throughout the exercise without the user needing to grip any part of the frame.

Q: What Dynasty Fitness machines pair with the DDR038 for a complete quad and lower body training area?
A: The DDR038 covers rectus femoris isolation through the sissy squat pattern. Pair it with the Leg Press/Hack Squat DDR003 for compound bilateral lower body pressing volume, and the Bulgarian Split Squat DDR040 for unilateral squat pattern development. For isolated quad knee extension alongside the sissy squat, the Leg Extension DSH017 adds the seated single-joint quad movement. The Kneeling Leg Curl DSH014 covers the hamstring isolation that completes the full thigh training area alongside the quad-focused DDR038.

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