STOAD 01 / LEG EXTENSION
RECLINED.
AND SEATED.
Two starting positions. Independent backrest, seat and shin-roller adjustments.
STOAD 01 / LEG EXTENSION
NEW BACKREST POSITION. THE SAME SEAT ANGLE.
The backrest moves through its linkage. The seat-pad angle stays unchanged as the backrest adjusts. The seat and shin roller each have their own adjustment.
Open the full 3D showroom
SeatedSame camera and scale. Model positions, not the hip angles measured in the studies.
- Exercise
- Leg extension
- Setups
- Seated / reclined
- 3D controls
- Back · seat · roller · movement
- Developed in
- Førde, Norway
- Status
- Working prototype
Take control in 3D.
Choose a camera. Explore the backrest, seat, shin roller and movement.
LOADING 3D MODEL …Drag to rotate · Zoom with the buttonsOne finger: scroll · Two: rotateNew backrest position. The same seat angle.
The backrest and linkage move. The seat-pad angle stays unchanged. The seat has its own slide, which you can try separately.
The movements illustrate the functions. Final mechanical limits have not been verified.
MEASUREMENTS AND FIT
FIND YOUR SETUP.
Begin with the knee aligned to the machine’s rotation axis. Adjust the seat, backrest and shin roller independently.
During a walkthrough we can check support, contact points and clearance together. Final adjustment dimensions and user ranges will be documented before production.
Seat and knee axis
02Shin contact
03Backrest and starting position
User ranges and final adjustment limits will be documented before production.
Discuss the fit with usTHE WHOLE MACHINE. EVERY FUNCTION.
SEE IT IN DETAIL.
Twelve views of the original model. Choose a function, see both positions or open a larger image.
SEATED SETUP
The whole machine in its seated model position. The same camera is used for the reclined view.
Product visualisations from the original geometry. Final materials, user ranges and mechanical limits are established before production.
THE REAL PROTOTYPE
SEE THE PROTOTYPE IN USE.
One physical machine. Two setups. Watch 26 seconds from the actual demonstration.
What has been demonstrated26 seconds from an actual demonstration. Reclined and more upright setups, with closer views of the adjustment beside the seat. No audio.
About the recording and its evidence
The clip shows visible use and adjustment of the prototype. It does not measure hip/knee angles, capacity or lifetime. The recording date and prototype version are not published. The description was checked against the clip on 5 September 2026.
Open the original clipProduct status · 5 September 2026
A PROTOTYPE. A CLEAR DIRECTION.
STOAD 01 is a working prototype. This is what has been demonstrated, what we are developing towards and what needs documentation before a sale.
Demonstrated means a function has been shown – not that every property has been measured. A development target is an intended direction. Not confirmed means the information needs clarification before a purchasing decision.
Seated and reclined setupsDemonstrated on the prototype+
An adjustable backrest is demonstrated in the prototype video. Final backrest angles and ergonomic settings must be measured on the production version.
Watch the prototype video ↗180 kg weight stackDevelopment target+
Development is based on a 180 kg weight stack. Final capacity, load testing and weight increments have not been confirmed.
Resistance profileDevelopment target+
The aim is a resistance curve that follows the quadriceps strength profile through the movement. A measured STOAD 01 torque curve has not been published.
Range of motion · ROMDevelopment target+
The design aims to allow a large range of motion and deep knee flexion. Start and end angles, adjustment range and user limitations require documentation.
Frame and materialsDevelopment target+
Stainless steel and aluminium are the intended material direction. The final material list, finishes and upholstery will be confirmed before production.
Service lifeNot confirmed+
Theoretically longer service life is a hypothesis: a larger design margin may reduce wear under the same working load. Actual life also depends on design, materials, maintenance and use. No comparative durability test has been published.
Warranty, dimensions and deliveryNot confirmed+
A five-year warranty is the intended direction. Coverage, exclusions and terms, together with dimensions, machine weight, pricing and lead time, must be set out in writing before an offer.
RESEARCH BEHIND THE IDEA
WHY CHANGE THE ANGLE?
Studies of hip angle provide a research starting point. None of the studies tested STOAD 01.
See the studies and limitationsLeg extension
Questions about STOAD 01.
Content reviewed .
What is a leg extension machine?
A leg extension is an exercise in which you extend your knee against resistance. A leg-extension machine trains the quadriceps at the front of the thigh. STOAD 01 is a working leg-extension prototype with an adjustable backrest, allowing seated and reclined setups to be explored in the same machine.
Watch the physical demonstrationHow do seated and reclined leg extensions differ?
Backrest position changes the hip angle. Rectus femoris, one of the quadriceps muscles, crosses both the hip and knee. The research page explains studies comparing different hip angles and separates long-term training results from acute measurements. None of these studies tested STOAD 01.
Read the hip-angle and leg-extension researchHow can I explore STOAD 01’s adjustments?
The 3D viewer lets you adjust backrest angle, seat, shin roller and movement. The measurements and fit section connects each adjustment to its contact point. Values describe the display model; physical fit and final manufacturing dimensions require confirmation on the finished machine.
Explore adjustments and fitCan a gym buy STOAD 01 now?
STOAD 01 is still a working prototype. Pricing, delivery, warranty and final specifications have not been released. Book a no-obligation walkthrough of what exists today and discuss the next documentation steps, floor space and access.
Explore the walkthrough for gymsSTOAD 01 · FØRDE, NORWAY
LET’S WALK THROUGH IT.
See the prototype function. Bring your questions about fit, use and the next steps.
Book a walkthroughA non-binding product walkthrough