Exercises and muscles targeted

Exercise	Muscles Targeted
Hip Extension — Knee Flexed (bilateral)	Gluteus Maximus (primary — hamstrings shortened, glute takes full load), Erector Spinae (secondary — lumbar and thoracic), Gluteus Medius (stabiliser), Hamstrings (reduced due to knee flexion — active at reduced length)
Hip Extension — Lower Footplate Position (greater knee flexion)	Gluteus Maximus (maximum isolation — hamstring contribution further reduced at deeper knee flexion, primary), Erector Spinae (secondary), Gluteus Medius (stabiliser)
Hip Extension — Higher Footplate Position (less knee flexion)	Gluteus Maximus (primary), Hamstrings (greater contribution as knee approaches extension — Biceps Femoris, Semimembranosus), Erector Spinae (secondary)
Hip Extension Isometric Hold (peak contraction)	Gluteus Maximus (sustained isometric contraction at full hip extension), Erector Spinae (isometric), Gluteus Medius, Multifidus (stabiliser)
Eccentric Hip Extension (controlled lowering)	Gluteus Maximus (eccentric overload — maximum muscle damage stimulus), Erector Spinae (eccentric), Hamstrings (eccentric at shortened position), Multifidus and Quadratus Lumborum (stabiliser)

The defining mechanical characteristic of the DPB410 is that the knee is flexed throughout the hip extension movement. This shortens the hamstrings, which reduces their ability to contribute to the drive and shifts the primary load onto the gluteus maximus. This is the opposite of a straight-leg back extension where both the glutes and hamstrings contribute. The DPB410 is therefore a more targeted glute isolation exercise than a conventional hyperextension, while still training the erector spinae as a secondary contributor through the lumbar extension component of the movement.

Who this machine is built for

Serious Home Gym Builders
You train glutes seriously and you want a machine that isolates the gluteus maximus more directly than a hip thruster or reverse hyper can by itself. The DPB410's knee-flexed hip extension mechanic reduces hamstring involvement and concentrates the stimulus on the glute specifically, which makes it a meaningful addition to a glute training programme that already includes hip thrust and deadlift-pattern work. At 68.2" × 41.4" it is space-efficient for the training category it covers.

Bodybuilders and Physique Athletes
Maximising gluteus maximus isolation volume is the primary goal in competitive glute development programming. The DPB410 achieves this by exploiting the mechanical disadvantage of the hamstrings at a flexed knee — when the hamstring is shortened, it cannot contribute effectively to the extension, so the glute does the work. This is distinct from every other posterior chain machine in the DPB series, and makes the DPB410 a genuine addition to a complete glute programme rather than a duplicate of something already covered.

Commercial Gym Owners and Operators
Glute training machines are among the highest-demand categories in commercial facilities, and the DPB410 occupies a specific position in that category that hip thrust machines and rear kick machines do not. The 9-position pneumatic leg pad means members adjust it quickly between sessions without manual struggle, and the front handles allow safe, independent entry and exit without staff assistance. At 302 lbs it stays firmly in place during commercial daily use.

Physical Therapists and Sports Medicine Practitioners
Hip extension strength with the knee flexed is used in posterior chain rehabilitation protocols where isolated glute activation needs to be re-established without the hamstrings compensating. The DPB410 provides a controlled, guided movement path with precise leg pad positioning through 9 height and angle adjustments, which allows load to be introduced progressively at the correct joint angles for each stage of a rehabilitation programme. As always, exercise selection and loading should follow the clinical programme for each individual patient.

University and College Athletic Departments
Glute-dominant hip extension in a knee-flexed position trains the gluteus maximus through a range that transfers directly to the drive phase of sprinting and jumping, where the knee is typically partially flexed as the hip extends. University S&C programmes use posterior chain isolation work to develop the glute independently of the hamstrings, which is relevant in athletes where the hamstrings are typically better developed relative to the glutes from conventional strength training alone.

Private Personal Training Studios
The 9-position pneumatic leg pad allows a trainer to set up clients of different heights quickly between sessions, and the two footplate cover options (flat and angled) accommodate different ankle mobility profiles without requiring additional accessories. The front handles give clients a stable entry and exit point, which matters when working with beginners or clients managing lower limb conditions where the mount and dismount of a prone machine can be awkward.

How to setup and use

Setting Up the DPB410 Multi Back Extension

Load Olympic plates centrally onto the single barbell tube, keeping the load balanced. Start conservatively on the first session to establish the correct body position before adding heavier plates.
Set the rear footplate to one of five height levels. A lower footplate position increases knee flexion and concentrates more of the hip extension load on the glutes. A higher position reduces knee flexion and allows the hamstrings to contribute more alongside the glutes. Start at the middle level for a balanced stimulus and adjust across sessions based on the target.
Choose the footplate cover for the session: the flat cover for users with adequate ankle mobility, or the angled cover for users with limited dorsiflexion or who prefer a more upright foot position. Confirm the flanged edge is facing outward before mounting.
Use the front support handles to mount the machine safely, stepping onto the footplate and positioning the thighs along the leg pads.
Adjust the pneumatic leg pad using light one-hand pressure on the gas spring lever until the pad contacts the back of the thigh just above the back of the knee. The pad should not sit at the calf or across the glutes. Confirm the pad stays in place before loading begins.
Once positioned correctly, grip the front handles for stability during the first rep to confirm the pad contact and foot position feel correct before releasing to perform the exercise.

Performing the Exercise

From the starting position with the hips flexed and the torso angled forward, drive the hips backward and upward by contracting the glutes, keeping the knee in contact with the leg pad throughout the movement.
Focus the effort on the glutes rather than attempting to straighten the leg. The knee remains bent against the pad resistance, which is what isolates the glute from the hamstrings through the extension.
Drive to full hip extension at the top of the arc where the body forms a straight line from the knee through the hip to the torso, squeezing the glutes at peak contraction for one to two seconds.
Lower back to the starting position under control over at least two seconds, allowing the glutes to lengthen through the eccentric return before the next rep.
Keep the feet pressed firmly into the footplate and the pad contact consistent at the back of the thigh throughout every rep. If the pad contact shifts during the set, stop and reposition before continuing.
After the final rep, grip the front handles and use them to dismount safely rather than stepping off while the swing arm is still in motion.

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%

Multi Back Extension DPB410

$2,149.00

$2,149.00 ~~$2,399.00~~ 10% off (Save$250.00 )

Commercial Grade
Pay With HFA/FSA

Free Shipping

Color: Black

PLEASE NOTE, Purple color is pre-order only, contact us to get the wait time

The Dynasty Fitness DPB410 Multi Back Extension is a plate-loaded glute and posterior chain machine that trains hip extension with the knee held in a flexed position throughout the movement, exploiting the mechanical disadvantage of the hamstrings at a bent knee to shift the primary load onto the gluteus maximus rather than distributing it equally between the glutes and hamstrings as a straight-leg back extension does. A 9-position pneumatic leg pad with gas spring assistance adjusts to different user heights and thigh lengths with one hand, and a 5-level rear footplate height setting changes the degree of knee flexion to tune the balance between pure glute isolation and combined posterior chain activation within the same machine. Two flanged anti-slip footplate covers in flat and angled configurations accommodate different ankle mobility profiles and stance preferences, and five front-mounted grip handles allow safe solo entry, exit, and positional bracing. A single centrally positioned barbell tube accepts Olympic plates for progressive plate-loaded loading. Built at 68.2" × 41.4" × 46.8" at 302 lbs, available in standard black with purple as a pre-order custom option, the DPB410 is built for commercial gyms, glute-focused training studios, and serious home gym setups where dedicated knee-flexed hip extension for gluteus maximus isolation is a posterior chain programming priority.

Plate-loaded multi back extension machine that trains the glutes, hamstrings, and spinal erectors through hip extension with the knee flexed, shifting peak load onto the gluteus maximus
9-position pneumatic leg pad adjusts height and angle with gas spring assistance so users of different heights find correct thigh alignment without manually forcing a stiff mechanism
5-level rear footplate height adjustment sets the knee flexion angle precisely, changing how much glute versus hamstring activation the movement produces
Dual footplates with flanged anti-slip edges accommodate flat and angled stance options, keeping the feet anchored through the full hip extension drive under heavy loads

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

Exercises and muscles targeted

Exercise	Muscles Targeted
Hip Extension — Knee Flexed (bilateral)	Gluteus Maximus (primary — hamstrings shortened, glute takes full load), Erector Spinae (secondary — lumbar and thoracic), Gluteus Medius (stabiliser), Hamstrings (reduced due to knee flexion — active at reduced length)
Hip Extension — Lower Footplate Position (greater knee flexion)	Gluteus Maximus (maximum isolation — hamstring contribution further reduced at deeper knee flexion, primary), Erector Spinae (secondary), Gluteus Medius (stabiliser)
Hip Extension — Higher Footplate Position (less knee flexion)	Gluteus Maximus (primary), Hamstrings (greater contribution as knee approaches extension — Biceps Femoris, Semimembranosus), Erector Spinae (secondary)
Hip Extension Isometric Hold (peak contraction)	Gluteus Maximus (sustained isometric contraction at full hip extension), Erector Spinae (isometric), Gluteus Medius, Multifidus (stabiliser)
Eccentric Hip Extension (controlled lowering)	Gluteus Maximus (eccentric overload — maximum muscle damage stimulus), Erector Spinae (eccentric), Hamstrings (eccentric at shortened position), Multifidus and Quadratus Lumborum (stabiliser)

Who this machine is built for

How to setup and use

Setting Up the DPB410 Multi Back Extension

Load Olympic plates centrally onto the single barbell tube, keeping the load balanced. Start conservatively on the first session to establish the correct body position before adding heavier plates.
Set the rear footplate to one of five height levels. A lower footplate position increases knee flexion and concentrates more of the hip extension load on the glutes. A higher position reduces knee flexion and allows the hamstrings to contribute more alongside the glutes. Start at the middle level for a balanced stimulus and adjust across sessions based on the target.
Choose the footplate cover for the session: the flat cover for users with adequate ankle mobility, or the angled cover for users with limited dorsiflexion or who prefer a more upright foot position. Confirm the flanged edge is facing outward before mounting.
Use the front support handles to mount the machine safely, stepping onto the footplate and positioning the thighs along the leg pads.
Adjust the pneumatic leg pad using light one-hand pressure on the gas spring lever until the pad contacts the back of the thigh just above the back of the knee. The pad should not sit at the calf or across the glutes. Confirm the pad stays in place before loading begins.
Once positioned correctly, grip the front handles for stability during the first rep to confirm the pad contact and foot position feel correct before releasing to perform the exercise.

Performing the Exercise

From the starting position with the hips flexed and the torso angled forward, drive the hips backward and upward by contracting the glutes, keeping the knee in contact with the leg pad throughout the movement.
Focus the effort on the glutes rather than attempting to straighten the leg. The knee remains bent against the pad resistance, which is what isolates the glute from the hamstrings through the extension.
Drive to full hip extension at the top of the arc where the body forms a straight line from the knee through the hip to the torso, squeezing the glutes at peak contraction for one to two seconds.
Lower back to the starting position under control over at least two seconds, allowing the glutes to lengthen through the eccentric return before the next rep.
Keep the feet pressed firmly into the footplate and the pad contact consistent at the back of the thigh throughout every rep. If the pad contact shifts during the set, stop and reposition before continuing.
After the final rep, grip the front handles and use them to dismount safely rather than stepping off while the swing arm is still in motion.

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.

Multi Back Extension DPB410

$2,149.00

$2,149.00 ~~$2,399.00~~ 10% off (Save$250.00 )

Key Features

Knee-Flexed Hip Extension Mechanics

The DPB410 trains hip extension with the leg pad positioned behind the knee, keeping the knee flexed throughout the movement. When the knee is bent, the hamstrings operate at a shortened muscle length and cannot generate their full contribution to the hip extension drive. This shifts the primary load onto the gluteus maximus, which is not similarly disadvantaged by the knee position. The result is a hip extension movement where the glute is the dominant contributor across the full range of motion rather than sharing the work with the hamstrings as it would in a straight-leg back extension.

9-Position Pneumatic Leg Pad System

The leg pad adjusts to 9 height and angle positions using two gas springs (QD-18-304-10Kg each) paired with a toothed plate mechanism. The gas spring assistance means the pad moves with light one-handed pressure rather than requiring the user to lift and slam the pad against a pin. This is a relevant daily-use detail in commercial facilities where the pad may be adjusted dozens of times across a session by different users of different heights. The 9 positions cover the full range from shorter to taller users and from different thigh lengths and hip proportions.

5-Level Rear Footplate Height Adjustment

The elevated rear footplate position sets the height at which the feet contact the platform, which determines the knee flexion angle at the start of the movement. A lower footplate setting increases knee flexion and further shortens the hamstrings, pushing more of the load onto the glutes. A higher footplate setting reduces knee flexion and allows slightly more hamstring co-activation. The 5-level adjustment gives users and coaches meaningful control over the balance between pure glute isolation and combined posterior chain activation within the same machine.

Dual Anti-Slip Footplates

Two footplate covers are provided for flat and angled stance modes (528×272mm and 528×416mm), giving the user a choice of foot orientation that suits different hip positions and ankle mobility profiles. The flanged edges on each footplate create a physical stop that prevents the feet from sliding forward or off the plate during the drive phase of the movement. Without this containment, feet shift under heavy loads and eccentric lowering phases, which breaks the position and reduces the quality of each rep.

Two Leg and Thigh Pads

Two padded contact pads (351×180×100mm each) rest against the back of the leg at the thigh and calf position when the user is mounted on the machine. These pads are the primary contact point that receives the hip extension force from the legs, they need to distribute that force evenly rather than concentrating it at a pressure point that causes the user to adjust mid-rep. The 100mm depth provides adequate cushioning under heavy plate loads while maintaining the positional stability that shallow pads cannot.

Single Barbell Tube Loading

One barbell tube (φ48×3.0×345mm) is positioned centrally on the swing arm for Olympic plate loading. The central position keeps the load balanced symmetrically across the hip extension arc. The tube accepts standard Olympic plates, keeping the loading system consistent with the rest of a plate-loaded training setup. The rubber bumper at the base of the carriage cushions the swing arm at the bottom of the movement arc, protecting the frame and reducing impact sound during use.

Front-Mounted Support Handles

Five grip points are distributed across two handle styles — three shorter grips (φ31×φ24×128mm) and two longer grips (STφ31×φ24×210mm) — positioned at the front of the machine for entry, exit, and positional stability during use. The front handles allow the user to mount the machine safely, position themselves correctly against the leg pad, and brace without strain during the extension drive. This is particularly relevant for solo commercial use where no staff or training partner is available to assist with machine entry on heavier plate loads.

Product Information
Product Name	Multi Back Extension
Model	DPB410
Series	DPB Plate Loaded Series
Product Type	Plate-Loaded Multi Back Extension Machine
Function	Hip extension under knee-flexed conditions — glute and posterior chain development
Target Muscles	Gluteus Maximus (primary), Erector Spinae (secondary), Hamstrings (secondary — reduced by knee flexion)
Grade	Commercial
Standard Colour	Black
Custom Colour Option	Purple — pre-order only, contact Dynasty Fitness for lead time
Dimensions and Weight
Length	68.2 in (173.3 cm)
Width	41.4 in (105.1 cm)
Height	46.8 in (118.9 cm)
Net Weight	302 lbs (137 kg)
Load and Resistance
Loading System	Plate-loaded — Olympic plates via single central barbell tube
Barbell Tube	1 x φ48×3.0×345mm
Swing Arm Bearings	6006-2Z (x2), 6002-2Z (x8)
Adjustability
Leg Pad Positions	9 positions — pneumatic, gas spring assisted (x2)
Rear Footplate Height	5 levels — sets knee flexion angle
Footplate Modes	Flat and angled — flanged anti-slip edges (528×272mm and 528×416mm covers)
Pads and Handles
Leg and Thigh Pads	2 x 351×180×100mm
Front Support Handles	5 grips — 3 x φ31×φ24×128mm, 2 x STφ31×φ24×210mm
Floor Mats	3 x rubber mats, 120×33×90mm
Levelling Foot	1 x adjustable, φ60×57mm
Indoor Use Only	Yes

Q: How is this different from a standard 45-degree back extension or hyperextension bench?
A: On a standard back extension bench the leg is straight, which means the hamstrings are at a long muscle length and contribute significantly to the hip extension drive alongside the glutes. On the DPB410 the knee is bent by the leg pad, which shortens the hamstrings and reduces their mechanical advantage. The glutes become the primary driver because the hamstrings cannot pull effectively from that shortened position. The DPB410 also adds plate loading that a bodyweight-only back extension bench cannot match, and the 9-position pneumatic leg pad means the movement path is precisely aligned for each user rather than being a one-size setup.

Q: How does the rear footplate height affect the exercise?
A: The footplate height controls how much the knee bends during the exercise. A lower footplate setting puts the foot closer to the body, which increases knee flexion and shortens the hamstrings further — pushing more of the hip extension load onto the gluteus maximus. A higher footplate setting reduces knee flexion, allowing the hamstrings to contribute more to the drive alongside the glutes. Start at the middle footplate position, which gives a balanced stimulus, then adjust based on whether you want to emphasise pure glute isolation or a combined posterior chain response.

Q: How do I set the leg pad to the correct position?
A: Mount the machine with your feet on the footplate and your thighs resting along the foam pads. The leg pad should sit across the back of the thigh just above the back of the knee, not at the calf. At this position, when you extend the hip backward, the pad gives resistance to the leg movement and keeps the knee flexed throughout. If the pad sits too high it contacts the glutes, which reduces the mechanical constraint on the knee. If it sits too low it contacts the calf and creates discomfort rather than positional control. The 9-position pneumatic adjustment with gas spring assist makes finding the correct position straightforward without requiring significant manual force.

Q: Can I use this machine without plates for bodyweight-only sets?
A: Yes. At lighter loads the machine still functions correctly — the swing arm and carriage move through the extension arc with bodyweight alone. This is useful for learning the movement pattern before adding plates, or for warm-up sets and high-rep finisher work where lighter loads are intentional. The movement quality and muscle activation pattern are the same regardless of plate loading, so starting with bodyweight establishes the correct position before heavier training begins.

Q: Does the machine need to be bolted to the floor?
A: No. Three rubber floor mats are included for placement under the frame contact points, and the adjustable levelling foot sets the machine level on uneven flooring. At 302 lbs before plates are loaded the machine stays grounded during normal training without anchoring. The rubber mats prevent sliding on smooth flooring surfaces and protect both the floor and the machine frame from wear at the contact points.

Q: What Dynasty Fitness machines pair with the DPB410 for a complete glute training setup?
A: The DPB410 targets the glutes through knee-flexed hip extension — a movement pattern that none of the other machines in the DPB series replicate exactly. Pairing it with the Hip Thruster DPB401 or Hip Thruster DSH031 adds horizontal hip extension for peak glute contraction at full lockout. The Reverse Hyper DPB407 adds pendulum posterior chain work through a swinging arc. The Standing Hip Thrust DPB402 covers standing hip extension from a different body position. Together these four machines train the gluteus maximus through four mechanically distinct patterns, which is the most effective approach to comprehensive glute development within a single training area.

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Every machine that leaves Dynasty Fitness carries the same promise: it is built to the commercial standard that professional training environments demand, priced so that standard is no longer exclusive to them, and backed by the support and warranty coverage that a long-term training investment deserves.

We are committed to equipment that stands the test of time — and to making sure the people who train the hardest have access to the tools that match their effort.