Load video: Leg Curl Leg Extension DRE8025 3D View

DRE8025 Leg Curl & Extension Machine Adjustable, durable leg trainer.

Side View of Leg Curl & Extension DRE8025 Machine Adjustable, durable leg trainer.

DRE8025 Leg Curl & Extension Machine dimensions 60.3" L x 46" W x 63.1" H.

Exercises and muscles targeted

The DRE8025 covers the two fundamental knee isolation patterns from one station. Leg extension trains the quadriceps through knee extension, and seated leg curl trains the hamstrings through knee flexion in a hip-flexed position. The Flex-Stack System keeps resistance accurate through both arcs.

Exercise	Muscles Targeted
Seated Leg Extension	Rectus Femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius (primary), Tibialis Anterior (stabiliser)
Seated Leg Curl	Biceps Femoris, Semimembranosus, Semitendinosus (primary), Gastrocnemius, Popliteus (secondary)
Terminal Knee Extension (isometric hold)	Vastus Medialis (VMO peak isometric, primary), Rectus Femoris, Vastus Lateralis (sustained)
Leg Curl Isometric Hold (peak flexion)	Biceps Femoris, Semimembranosus, Semitendinosus (sustained isometric), Gastrocnemius (co-contraction)
Slow Eccentric (either exercise)	Quadriceps or Hamstrings (eccentric lengthening for hypertrophy stimulus)
Leg Curl/Extension Superset	Quadriceps (extension phase), Hamstrings (curl phase), agonist-antagonist volume from one station

How to setup and use

Setting Up for Leg Extension

Rotate the semi-circular leg pad up and away so it clears the shin entirely.
Set the ankle pad to one of 7 positions above the ankle.
Set the knee joint adjustment to the correct position within the 4-position extension range.
Set the backrest so your knees rest on the seat's thickened front section.
Grip the handles beneath the seat before beginning.

Setting Up for Leg Curl

Rotate the leg pad back down into the working position against your thighs.
Set the knee joint adjustment within the 3-position curl range.
Slide the ankle pad behind your lower calf without slippage.
Use the quick-adjust handle to fine-tune the seat without dismounting.

Performing the Exercise

For extension, drive both legs upward to full extension, hold briefly, then lower under control.
For curl, curl both legs toward the seat, hold at peak flexion, then return under control.
Keep the movement smooth in both directions rather than dropping the weight.

See the Leg Curl/Leg Extension Machine in Action

Who this machine is built for

Serious home gym builders: Covers extension and curl from one 60.3"x46.0" footprint with a single 210 lb stack delivering true 1:1 resistance.

Commercial gym owners: Zero stack-weight ambiguity and a quick-adjust handle without dismounting keep throughput high on one of the most-used isolation stations.

Powerlifters and strength athletes: Precise 1:1 accessory loading builds terminal quad extension and hamstring flexion strength that barbell training develops incompletely.

Bodybuilders and physique athletes: Tested pivot alignment produces cleaner quad and hamstring contraction than approximated pivot geometry, with accurate progressive overload tracking.

University and college athletic departments: Supports knee joint health and agonist-antagonist strength balance assessment across a full roster in one station.

Physical therapists and sports medicine practitioners: Tested pivot alignment reduces knee shear force, with range restricted to each patient's stage of recovery.

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%

Leg Curl/Leg Extension DRE8025

$2,649.00

$2,649.00 ~~$2,949.00~~ 10% off (Save$300.00 )

Commercial Grade
Pay With HFA/FSA

Free Shipping

Stack: 210lb

210lb 250lb 275lb 295lb

Color: Black

BLACK - PRE ORDER FOR MIDDLE OF OCTOBER

WHITE - PRE ORDER FOR END OF SEPTEMBER

The DRE8025 Leg Curl/Leg Extension is a dual-function selectorized machine that trains the quadriceps through seated extension and the hamstrings through seated curl from one station. The Dynasty Flex-Stack System delivers a true 1:1 felt weight ratio through both exercises.

Built at 60.3"x46.0"x63.1" with a 210 lb standard stack and a 295 lb upgrade option, a biomechanically tested pivot, and separate 4+3-position knee joint adjustment for each exercise, the DRE8025 fits every user precisely.

True 1:1 Flex-Stack resistance: The weight you select is the resistance your quads and hamstrings feel through both exercises.
Tested pivot alignment: Knee joint pivot matches the natural movement axis, producing a clean arc in both curl and extension.
Zero-slack engagement: Resistance loads from the first millimetre of movement, eliminating the dead zone standard leg machines leave unloaded.
Rotating leg pad: Semi-circular pad supports the curl, then rotates away completely for unobstructed extension without removing anything.

Watch the Installation Video of Leg Curl Leg Extension DRE8025

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

Exercises and muscles targeted

Exercise	Muscles Targeted
Seated Leg Extension	Rectus Femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius (primary), Tibialis Anterior (stabiliser)
Seated Leg Curl	Biceps Femoris, Semimembranosus, Semitendinosus (primary), Gastrocnemius, Popliteus (secondary)
Terminal Knee Extension (isometric hold)	Vastus Medialis (VMO peak isometric, primary), Rectus Femoris, Vastus Lateralis (sustained)
Leg Curl Isometric Hold (peak flexion)	Biceps Femoris, Semimembranosus, Semitendinosus (sustained isometric), Gastrocnemius (co-contraction)
Slow Eccentric (either exercise)	Quadriceps or Hamstrings (eccentric lengthening for hypertrophy stimulus)
Leg Curl/Extension Superset	Quadriceps (extension phase), Hamstrings (curl phase), agonist-antagonist volume from one station

How to setup and use

Setting Up for Leg Extension

Rotate the semi-circular leg pad up and away so it clears the shin entirely.
Set the ankle pad to one of 7 positions above the ankle.
Set the knee joint adjustment to the correct position within the 4-position extension range.
Set the backrest so your knees rest on the seat's thickened front section.
Grip the handles beneath the seat before beginning.

Setting Up for Leg Curl

Rotate the leg pad back down into the working position against your thighs.
Set the knee joint adjustment within the 3-position curl range.
Slide the ankle pad behind your lower calf without slippage.
Use the quick-adjust handle to fine-tune the seat without dismounting.

Performing the Exercise

For extension, drive both legs upward to full extension, hold briefly, then lower under control.
For curl, curl both legs toward the seat, hold at peak flexion, then return under control.
Keep the movement smooth in both directions rather than dropping the weight.

See the Leg Curl/Leg Extension Machine in Action

Who this machine is built for

Serious home gym builders: Covers extension and curl from one 60.3"x46.0" footprint with a single 210 lb stack delivering true 1:1 resistance.

Commercial gym owners: Zero stack-weight ambiguity and a quick-adjust handle without dismounting keep throughput high on one of the most-used isolation stations.

Powerlifters and strength athletes: Precise 1:1 accessory loading builds terminal quad extension and hamstring flexion strength that barbell training develops incompletely.

Bodybuilders and physique athletes: Tested pivot alignment produces cleaner quad and hamstring contraction than approximated pivot geometry, with accurate progressive overload tracking.

University and college athletic departments: Supports knee joint health and agonist-antagonist strength balance assessment across a full roster in one station.

Physical therapists and sports medicine practitioners: Tested pivot alignment reduces knee shear force, with range restricted to each patient's stage of recovery.

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.

Leg Curl/Leg Extension DRE8025

$2,649.00

$2,649.00 ~~$2,949.00~~ 10% off (Save$300.00 )

Key Features

Dynasty Flex-Stack System

An internal pulley design delivers a true 1:1 felt weight ratio through both exercises, offsetting the resistance loss that cam-based leg machines produce at mid-range, exactly where the quads and hamstrings work hardest. The weight selected on the stack is the resistance felt through the full arc of both movements.

Biomechanically Tested Pivot Point

The knee joint pivot was determined through extensive data sampling to align precisely with the knee's natural movement axis. A pivot that does not match this axis creates a shifting load the joint compensates for on every rep, reducing efficiency and increasing joint stress under heavier loads.

Zero-Slack Resistance Travel

The weight stack engages from the first millimetre of ankle pad movement in both exercises. Standard leg machines carry cable slack at the starting position, leaving the opening portion of each rep unloaded until the slack is taken up.

4+3-Position Knee Joint Adjustment

Separate adjustment ranges serve each exercise rather than one shared setting, since the ideal pivot alignment differs slightly between extension and flexion. The 4-position range covers extension, the 3-position range covers curl, keeping both movements correctly aligned.

Semi-Circular Leg Pad with Rotation Storage

The pad wraps around the back of the thigh during curl for even contact through the full arc, then rotates upward and locks in storage during extension so nothing interferes with the shin. No component needs to be removed or reattached.

Two-Stage Seat Design

A thickened front section elevates knee joint support relative to the rear of the seat, reducing the pelvis lift that can occur during the extension drive. A quick-adjust handle lets you change seat position between exercises without dismounting.

Product Information
Product Name	Leg Curl/Leg Extension
Model	DRE8025
Series	DRE80 Selectorized Series
Product Type	Selectorized Dual-Function Leg Curl and Leg Extension Machine
Functions	Seated leg extension and seated leg curl
Target Muscles	Quadriceps — all four heads (extension), Hamstrings — Biceps Femoris, Semimembranosus, Semitendinosus (curl)
Resistance System	Dynasty Flex-Stack System — 1:1 felt weight ratio
Resistance Engagement	Zero-slack resistance travel design — immediate from first millimeter of movement
Grade	Commercial
Colour	Black
Dimensions and Weight
Length	60.3 in (153.0 cm)
Width	46.0 in (117.0 cm)
Height	63.1 in (160.2 cm)
Net Weight	571 lbs (259 kg)
Weight Stack
Standard Weight Stack	210 lbs
Upgraded Weight Stack	250 lbs — contact Dynasty Fitness
Adjustability
Knee Joint Adjustment	4+3 positions — 4 for leg extension, 3 for leg curl
Ankle Pad Positions	7 positions
Leg Pad Positions	5 positions — semi-circular profile, rotates to storage for extension
Backrest Positions	8 positions
Seat Design	Two-stage — thickened front section for knee joint support
Adjustment Access	Quick-adjust handle — changes without dismounting
Mechanism and Pulleys
Pulleys	4.5" pulley x4, 3.5" pulley x1, V-pulley x1
Bearings	6005-2Z x8
Frame and Construction
Main Frame Tubing	1.97"×5.9"×0.1" rectangular steel
Movement Arm Tubing	Φ2.4"×0.1"
Indoor Use Only	Yes

Q: What is the Dynasty Flex-Stack System and why does it matter on a leg curl and extension machine?
A: The Dynasty Flex-Stack System is the internal pulley design that delivers a true 1:1 felt weight ratio — the weight selected on the stack is the resistance the quads or hamstrings work against through the full arc of both exercises. Most selectorized leg machines use cam systems that reduce the felt weight below the selected stack weight through the mid-range of the movement, which is where the quadriceps and hamstrings are producing peak force. The Flex-Stack system offsets this loss so the resistance is accurate and consistent from start to finish in both directions. Felt weight may vary slightly based on ankle pad position due to changes in lever arm length, but the 1:1 design eliminates the systematic under-resistance that standard cam-based machines produce.

Q: How is the 4+3-position knee joint adjustment different from a standard adjustment?
A: The 4+3-position system provides separate adjustment ranges for each exercise rather than a single adjustment shared across both. The 4-position range covers the knee joint alignment needs of the leg extension, and the 3-position range covers the curl. This matters because the knee joint's ideal pivot alignment differs slightly between a knee extension motion and a knee flexion motion, and a single shared adjustment that approximates both introduces alignment compromise in at least one exercise. The separate ranges allow the pivot to be set correctly for whichever exercise is being performed.

Q: Why does the leg pad rotate away for leg extensions?
A: During leg extension, the ankle pad contacts the front of the shin while the leg is driven upward. The semi-circular leg pad used for curl training contacts the back of the thigh and would interfere with the shin and lower leg during an extension if it remained in the working position. Rotating it upward and locking it in storage clears the leg entirely so the extension arc is completely unobstructed. The rotation mechanism requires no tools and takes a single hand movement, so switching from curl to extension setup does not slow down the transition between exercises.

Q: What does zero-slack resistance travel mean for leg training specifically?
A: In both leg extension and leg curl, many machines have cable slack built into the neutral starting position — the legs move through the first few degrees of the arc before any resistance engages. This dead zone means each rep has an unloaded opening portion, and the effective training range per rep is shorter than the actual movement range. The zero-slack design on the DRE8025 means the selected stack weight is active from the very first degree of movement in both exercises, which makes every rep fully loaded from initiation through to the end of the eccentric return.

Q: Can I train leg curl and extension in the same session as a superset on this machine?
A: Yes, and this is one of the most effective ways to programme the DRE8025. Agonist-antagonist supersets between quad and hamstring isolation are a standard technique in bodybuilding and hypertrophy programming because one muscle group can recover while the opposing group is working. Switching between leg extension and curl on the DRE8025 requires rotating the leg pad, adjusting the ankle pad position, and making a minor knee joint adjustment — all single-hand operations that can be done without dismounting using the quick-adjust handle. The weight stack requires no change if both exercises use the same working load.

Q: What Dynasty Fitness machines pair with the DRE8025 for a complete leg training area?
A: The DRE8025 covers quad isolation through leg extension and hamstring isolation through seated leg curl. Pair it with the Leg Press/Hack Squat DRE8016 for compound bilateral leg pressing that develops quad and glute strength at heavier loads alongside the isolation work. The Prone Leg Curl DRE8015 adds hamstring training in the hip-extended position that produces a different muscle activation profile from the seated curl, complementing the DRE8025's seated curl function. The Glute Drive DRE8022 adds horizontal hip extension for gluteus maximus isolation to complete the full lower body selectorized training area.

Commercial Selectorized Machines. Engineered to Perform.

Dynasty Resistance Elite

The Dynasty Resistance Elite is Dynasty Fitness's flagship selectorized series, built around the Dynasty Flex-Stack System that delivers a true 1:1 felt weight ratio across the majority of the lineup. What you select on the stack is exactly what you lift, giving every session accurate, progressive resistance from the first rep to the last.

The series covers the complete commercial training floor. ISO-lateral pressing and pulling machines including the ISO-Lateral Chest Press, ISO-Lateral Shoulder Press, and ISO-Lateral Seated Row train each side of the body independently through its own natural arc, eliminating the compensation that fixed bilateral machines allow. Dedicated lower body stations including the Leg Press/Hack Squat, Leg Curl/Leg Extension and Glute Drive cover compound and isolation lower body training from selectorized stations built for heavy daily volume. A complete cable training ecosystem spans from the Adjustable Cable Crossover and Dual Adjustable Pulley through to the 4-Stack, 5-Stack, and 8-Stack Multi Station systems for facilities that need multiple concurrent training zones.

Every machine is built from heavy-duty commercial steel, finished in matte black, and backed by Dynasty's lifetime frame warranty. This is commercial-grade equipment at a price point that makes it accessible to every serious training environment.

Explore the Elite Series

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OUR COMMITMENT

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.

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This is a great machine, multiple adjustments make it easy for me and my kids to get into comfortable positions for both movements. With the 1 to 1 feel weight ratio is has plenty of resistance. I don’t think I needed to upgrade to the 275 lb weight stack. At 55 I don’t think I’ll ever lift that. Maybe my son will at some point . Installation was fairly easy because it’s not in a thousand pieces, they did a great job shipping it with many sections pre-assembled to cut down on the steps. YouTube video also helped a lot (a must watch because the written instructions are not detailed at all) The owner also stated they’ll be coming out with a more comprehensive assembly video in the near future. I’m actually very happy with this machine, it could very easily be at a commercial gym. Dynasty needs to get their name out there if their other machines are at this quality and price point, they could be a top contender in the fitness and home gym market.

First time purchasing from Dynasty - customer service was excellent. They were very prompt and helpful throughout the purchasing process, answered emails even on weekends, and clearly understood the equipment very well.

The quality of the product is very high. I looked for a long time for a selectorized leg extension / seated leg curl with a 1:1 ratio, good range of motion for different body types (machine is for me and my wife), and the half thigh pad with handles for leg curls. The fact that the pad also articulates is really nice. My biggest concern with these types of machines was limited range of motion/stretch on leg extensions, and the thinner seat pad with the recessed leg design solves that problem.

I am 5'8", 145 lbs, 33 years old and my wife is shorter/smaller, and it works perfectly for both of us. We both get a good stretch on leg extensions and leg curls, and I can’t even use the full range of motion available. I have zero knee pain with this machine, and the pivot point lines up perfectly with the knee joint for both of us. Transitioning from leg extensions to leg curls is seamless, especially because of the counterweight. The lever-style adjustments versus pop pins are also a very nice quality-of-life improvement.

The 210 lb weight stack is more than enough for my type of training, which is mostly 8–15 rep hypertrophy sets. I think this is more than enough for most lifters, you would have to be pretty big/strong to need anything north of the standard weight stack. Gym pin is workable, but be mindful of the shroud/counterweight if you go that option!

Shipping and delivery - had no issues. Packaging was very good with no damage, and the quality of the padding and materials feels very solid.

Assembly was fairly simple. Basic allen keys or a hex bit socket set with a ratchet will work fine. I was able to unpackage and move around everything myself (except the weight stack frame as it is large) and assembly was fine by myself. If you are just using allen keys, you will need at least an 8mm and an adjustable wrench.

The instructions are similar to other commercial machines from what I have seen, where it is more of an exploded diagram. I have limited experience, for what it’s worth, but I have owned Hoist/Nautilus equipment. I appreciated that they took the effort to create a video to help walk through the assembly. I wouldn’t read too much into other comments about assembly. Yes, these are not 25 page step-by-step instructions, but it really wasn’t that bad!

Highly recommend the brand and machine to anyone in the market! I would buy again / other pieces!

I recently purchased this leg extension/leg curl machine from dynasty and have been extremely impressed with it. It arrived exceptionally well packaged, and everything was protected during shipping. I found zero quality control issues—no missing hardware, damaged parts, or manufacturing defects.
Once I got it assembled, the first thing I noticed was how incredibly smooth the movements felt. It operated flawlessly throughout the entire range of motion, with no sticking points or rough spots. The true 1:1 ratio made this piece a no brainer for me. Most leg ext/leg curl machines out there are not true 1:1 ratio so that was a big reason for purchasing this. Switching between extensions and leg curls was also extremely quick, smooth, and very easy.
Assembly was straightforward. Anyone with decent mechanical skills should have no problem putting it together using the included diagram and installation video. The only thing I wish was included was some allen keys but luckily I was able to get it done with some spare allen keys I had. What really stood out though was the customer service. Any questions I had were answered quickly and professionally! Looking forward to getting some more stuff from dynasty!

I've only had the DRE8025 for a few weeks, but between my wife and I we've already put about 4 sessions on it, and so far I'm extremely impressed.

The machine arrived in two freight-delivered boxes and was packaged exceptionally well. Everything arrived in perfect condition with zero damage, which made for a great first impression.

Assembly wasn't difficult, but the instructions definitely need improvement. They're basically a couple of exploded diagrams, which made figuring out a few of the steps pretty tricky since there was so much going on. Thankfully all the hardware was labeled and Dynasty sent me a factory assembly video ahead of time, which helped fill in the gaps. The only part that really slowed me down was figuring out the orientation of the pulley arm relative to the cam, but luckily I nailed it on the first try.

Once assembled, this thing is a tank. It's rock solid and surprisingly heavy even before adding the weight stack, so I'd definitely recommend assembling it where you plan on keeping it. I was also pleasantly surprised to find built-in leveling feet, which is a huge plus for garage gym owners with uneven floors and something you don't typically see at this price point.

The fit and finish are excellent. The gray powder coat has a subtle metallic sparkle to it that looks far more premium than the generic black finishes found on a lot of equipment. The upholstery also stands out. It's firm, nicely contoured, and has that high-end guitar case look and feel that I personally love.

I'm also a big fan of the lever-style adjustments. They look great, feel more premium than pop pins, and are much quicker to use. Everything adjusts easily and there are plenty of adjustment points throughout the machine.

For reference, I'm 6'0" and 225 pounds, and the machine fits me perfectly. It doesn't feel cramped or undersized, but it also doesn't have an unnecessarily large footprint.

The range of motion is about as good as I've ever experienced on a machine like this. Both movements feel fantastic, but the leg extension is where this machine really shines. I'm able to position the pad far enough behind me to get as much stretch as I want at the bottom, which is something many machines seem to miss entirely for whatever reason.

The resistance is also no joke. I have the 275-pound stack installed, and honestly it's more weight than I'll ever need. Dynasty's floating pulley design makes the resistance feel significantly heavier than most competing machines. I even measured the resistance at the leg roller with a fish scale. With 40 pounds selected, I was seeing roughly 48 pounds of force. On many competing machines, that same 40-pound selection would feel closer to 20 pounds at the roller.

I can use the entire stack on several other leg curl/extension machines I've tested, but I'm nowhere close on this one. In fact, I'm only managing around 130 pounds right now. Because of that, I think most people would be perfectly happy with the 210-pound stack option.

Overall, I couldn't be happier with it. The instructions could use some work, but that's honestly my only real complaint. Once assembled, the machine absolutely delivers and has easily become one of my favorite pieces in the gym.

The leg curl/extension was packaged well, and everything arrived in good condition. It all went downhill from there. Instead of sending proper assembly instructions, Dynasty sent a one page diagram for assembly (which was awful). They then pointed me to an "assembly video", which certainly helped more than the completely useless diagram did, but the video wasn't great. The video shows two guys in a factory in China, who don't say a single word during the video. For a $3K machine, it's beyond ridiculous that it would be sent out without proper assembly instructions. The machine is just okay, and is absolutely NOT worth the $3K price that I paid for it. The leg roller is smaller than any other commercial leg machine I've used. Another minor nitpick for me (an this is a me thing), I am not a fan (at all) of the goofy Dynasty logo with the odd looking crown. They should stick to just putting their company name on the machine, and ditch the terrible looking logo! The range of motion is just okay. If this machine was half the price it's being sold for, it would be a good option. At the $3K price point, there are FAR better options out there. Save your money, and buy from a more established brand. This was my first purchase from Dynasty, and will absolutely be my last purchase from this company.

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