Skip to content

Located at 214 Lincoln Blvd Unit A, Venice, CA

We Accept HSA/FSA

Free Shipping to the 48 Contiguous States

Leg Extension DRE8014

Regular price $2,649.00
Sale price $2,649.00 Regular price $2,949.00 10% off (Save$300.00 )

Key Features

1.

Biomechanically Tested Pivot Point

The knee joint pivot on the DRE8014 was positioned through extensive biomechanical testing to align with the knee's natural movement axis through the full seated leg extension arc. This matters specifically because the knee does not rotate around a single fixed point — it follows a complex rolling-and-sliding movement path that shifts as the joint flexes and extends. A pivot that does not track this path creates a resistance direction that diverges from the quadriceps' pull direction at some point in the arc, causing the joint structures to compensate and reducing the training quality per rep. The tested pivot keeps the resistance aligned with the quad's extension force direction across the full arc from 90 degrees of flexion through to terminal extension.
2.

Three-System Adjustment Architecture

Seven ankle pad positions, eight backrest positions, and five knee angle positions operate as independent axes that together configure the machine for each user's specific combination of leg length, torso length, and knee joint position. The ankle pad adjustment sets the contact point correctly for different lower leg lengths without the pad pressing on the ankle joint. The knee angle setting aligns the machine's pivot with the knee joint centre for each user's thigh length. The backrest position sets the hip flexion angle, which changes the rectus femoris stretch and its relative contribution to the extension. No single-axis machine can address all three variables simultaneously — the three-system design is what produces the custom-fit sensation the machine delivers across the full range of user body proportions.
3.

Backrest Angle and Rectus Femoris Targeting

The rectus femoris is the only quadriceps muscle that crosses both the hip and the knee, meaning its length at the start of the exercise is influenced by the hip flexion angle set by the backrest position. A more reclined backrest increases the hip flexion angle, which lengthens the rectus femoris at the hip before the extension begins — creating a longer effective training range and a stronger eccentric stimulus for this specific head during the return. A more upright backrest reduces the rectus femoris stretch and shifts the overall quad stimulus toward the three vasti, which do not cross the hip. This allows the DRE8014's eight backrest positions to serve as a programmable rectus femoris targeting tool across a training cycle.
4.

Quick-Adjust Seat Handle

The backrest adjustment operates via a handle accessible from the seated position, allowing angle changes without dismounting between sets. This is the feature that makes multi-angle giant set programming practical on the DRE8014 — running sets across two or three different backrest positions within a single extended quad session to hit the rectus femoris at different effective lengths without breaking the session to stand, manually reposition, and sit again between every backrest change.
5.

Dynasty Flex-Stack System

The DRE8014 runs on the Dynasty Flex-Stack System, delivering a true 1:1 felt weight ratio through the full leg extension arc including the eccentric return. This is particularly relevant at the fully extended top position where the quads are at their shortest and the felt resistance from cam-based machines typically drops to its lowest — the exact point where the VMO isometric contraction and peak lockout stimulus should be at their strongest. The Flex-Stack system maintains consistent resistance at this position, supporting both the terminal hold and the loaded eccentric return that produces the greatest hypertrophy stimulus for all four quad heads.
6.

Split Two-Section Seat Pad

The seat pad is constructed as two sections — a thickened front section elevated above the rear. The elevation at the front positions the back of the thighs on a raised support surface that contacts across the thigh rather than at the knee joint itself. On a flat seat, the edge of the seat creates a pressure point directly at the back of the knee where tendons and vascular structures run — a mechanical limitation that reduces how long a set can continue before discomfort, not muscle fatigue, becomes the limiting factor. The thickened elevated front resolves this by moving the contact point proximally up the thigh and distributing the support force across a larger surface area.

Product Information
Product NameLeg Extension
ModelDRE8014
SeriesDRE80 Selectorized Series
Product TypeSelectorized Leg Extension Machine
FunctionSeated leg extension — bilateral quadriceps isolation
Target MusclesRectus Femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius (all four quadriceps heads, primary)
Resistance SystemDynasty Flex-Stack System — 1:1 felt weight ratio
Pivot DevelopmentExtensive biomechanical testing — aligned with knee joint movement axis
GradeCommercial
ColourBlack
Dimensions and Weight
Length55 in (139.4 cm)
Width43 in (108.0 cm)
Height63 in (160.2 cm)
Net Weight503 lbs (228 kg)
Weight Stack
Standard Weight Stack210 lbs
Upgraded Weight Stack250 lbs — contact Dynasty Fitness
Adjustability
Ankle Pad Positions7 positions — telescopic frame adjustment
Backrest Positions8 positions — quick-adjust handle, changes without dismounting
Knee Angle Positions5 positions — pivot alignment adjustment
Pads and Body Support
Seat DesignSplit two-section — thickened front elevated above rear for knee joint support
Abdominal PadFront torso anchor — prevents hip lift under heavy extension loads
Ankle Pad SurfaceLeatherwear foam — durable shin contact surface
Mechanism and Pulleys
Pulleys4.5" pulley x2, 3.5" pulley x1, V-pulley x1
Bearings6005 x6
Frame and Construction
Main Frame Tubing1.97"×5.9"×0.1" rectangular steel
Movement Arm TubingΦ2.4"×0.1"
Indoor Use OnlyYes

The Dynasty Fitness
Commercial Machines, Home Gym Prices
The Dynasty Fitness
Commercially Engineered, Available to All

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.

214 Lincoln Blvd Unit A, Venice, CA

5 Star Reviews

Over 100 Gym Machines

Visit Showroom

Free shipping on everything

Free Shipping

All orders are delivered to your doorstep at no extra charge.

Secure Payment

Shop with confidence knowing your payments are secure and your information

Lifetime Warranty

We offer lifetime warranty on the frame and parts under proper use