A250 Leg Extension

Models 1121 and 1122

A QUAD WORKOUT FOR ALL

The quadriceps are one of the most powerful muscle groups we have. They are responsible for much of our stability and mobility. This Leg Extension features a seat that adjusts forward and back without changing its tilt for maximum comfort. An optional range‑limiting device (Model 1122) lets you set the starting and ending points in the range of motion. The perfect match to the A250 Leg Curl, the A250 Leg Extension gives you a smooth resistance that protects the body from shock loading. 

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The quadriceps are one of the most powerful muscle groups we have. They are responsible for much of our stability and mobility. This Leg Extension features a seat that adjusts forward and back without changing its tilt for maximum comfort. An optional range‑limiting device (Model 1122) lets you set the starting and ending points in the range of motion. The perfect match to the A250 Leg Curl, the A250 Leg Extension gives you a smooth resistance that protects the body from shock loading. 

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Features you won’t find in conventional machines

  • Bilateral movement to train muscle symmetry

  • Cost‑effective way to provide strength training options

  • Large digital display that shows resistance, sets, repetitions, and peak power

  • Thumb buttons let you change resistance without changing position — even during exercise

  • Fast, easy, and precise eccentric overloading

  • Change resistance in increments as small as one pound

  • Industry-leading lifespan and uptime for years of use

  • Unique versatility; five ways to train instead of only one

  • Fully adjustable to accommodate a wide range of users

  • Thick base for added stability

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  • Bilateral movement to train muscle symmetry

  • Cost‑effective way to provide strength training options

  • Large digital display that shows resistance, sets, repetitions, and peak power

  • Thumb buttons let you change resistance without changing position — even during exercise

  • Fast, easy, and precise eccentric overloading

  • Change resistance in increments as small as one pound

  • Industry-leading lifespan and uptime for years of use

  • Unique versatility; five ways to train instead of only one

  • Fully adjustable to accommodate a wide range of users

  • Thick base for added stability

COMMERCIAL-GRADE WARRANTY

We proudly stand behind the workmanship of our machines

MADE IN THE USA

with domestically and globally sourced materials

Why choose the A250 Leg Extension?

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Lower risk of injury. Pain-free range of motion.
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Achieve your training goals faster
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Train at any speed — unlike conventional equipment
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Unmatched versatility to achieve any goal

Control Resistance With Digital Convenience And Precision

THUMB BUTTON CONTROLS

Thumb button controls on handgrips let you change resistance without changing position.

Change resistance during exercise without stopping.

Convenient resistance controls are perfect for quick, precise, eccentric overloading.

POWER DISPLAY

Get instant feedback for testing and evaluation. The Power Display shows:

  • Resistance level in (lbs. or kg)
  • Sets
  • Repetitions
  • Peak power produced on each repetition
  • Percentage of peak power
  • Adjustment positions

Six-repetition Peak Power test calculates the resistance at which you achieve maximum power. Clear, one-inch numbers can be seen from a distance.

CHIP SYSTEM AND INTEGRATED TECHNOLOGY

Your electric workout card remembers and displays your previous workout:

  • Resistance 
  • Sets
  • Reps
  • Adjustment Positions

Use Keiser Chip System with the Keiser Integrated Technology to download your workout on your phone, tablet, or computer.

Clear Advantages for your Business

Health Clubs

Attract more members and improve retention with more ways to train.

Learn more

Sports Performance

Strength at speed: Train explosive movement more safely.

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Medical Rehab

More visits, better outcomes, improved patient experience.

Learn more

Older Adult

Keiser works for every level of fitness and will make your facility stand out.

Learn more

Questions? Talk to a performance coach.

Mac Calloway,
Human Performance and Education Specialist

Our pros know what you need and can explain our strength machines in terms that make sense to professionals like you (USA and Canada only).

Set up a Conversation

TRY KEISER STRENGTH FOR YOURSELF

One of our Demo Vans will bring two of our strength machines to any location in Mainland UK and Scottish Highlands. And we’ll bring other machines from our functional, racks, and cardio lines for you to try.

Specifications

Lightweight

Easy to move when you need to change your floorplan. Place machines in locations where weight may be a concern (mezzanines, cruise ships, etc.).

Compact Footprint

Helps you make the most of your available floorspace.

Download full product sheet

A) WIDTH: 44” / 1118 mm

B) HEIGHT: 45”/1143 MM

C) LENGTH: 46”/1169 MM

WEIGHT: 169 LBS/77 KG (Model 1121)

WEIGHT: 208 LBS/95 KG (Model 1122)

RESISTANCE: 0246 LBS/0112 KG

Get The Look You Need

STANDARD UPHOLSTERY COLORS

We offer a variety of upholstery color options — and our standard Raven Black painted frame — at no additional cost.

WE CAN MATCH YOUR REQUIREMENTS

Custom paint and upholstery colors are available to match the requirements of your brand or decor. And you can add custom graphics for a complete branded solution.

SEE HOW KEISER LOOKS IN YOUR SPACE

We’ll help you design your floor plan in the best layout. And our 3D renderings let you see how your space will look with new Keiser equipment. We’ll even include your equipment from other manufacturers. (USA and Canada only)

Your Keiser Representative will provide pricing for any machines you like. Please include the names of those machines in your message. 

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Location Type

WE’RE SORRY, THE MOBILE SHOWROOM IS CURRENTLY NOT AVAILABLE FOR HOME SALES.

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Contact Customer Support

To contact Keiser's service department please fill out the fields below. 

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Notify me of Keiser Corporation news, events and offers via Email

By clicking yes, you agree to receive special offers, announcements, and more through email and personalized ads on digital and social media platforms. You can choose to stop sharing personal data at any time.

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Looking for Keiser equipment in your home?

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Notify me of Keiser Corporation news, events and offers via Email

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Designed by Keiser. Built by Keiser. Backed by Keiser.

Keiser strength machines are backed by our all-product limited warranty. It covers defects in materials and workmanship for up to 10 years (depending on the part in question). Damage caused by abuse, misuse, or neglect of normal care is not covered.

Our warranty covers:

  • Structural integrity of frame members: 10 years
  • Cylinders: 3 years
  • Displays, processor boxes, and thumb buttons: 3 years

See our warranty page for full details

“I tell people: ‘My job’s easy; I only have to design the machine once. Randy has to build it day after day to the high standards we set many years ago, and do it with a team of people that have to believe in Keiser, its mission, and each other to succeed.”

- Dennis Keiser

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Keiser fitness equipment is made in the USA

with domestically and globally sourced materials

Dennis Keiser (left)

President

His office is just steps away from
the factory floor

Randy Keiser (right)

Executive Vice President
Head of Manufacturing

His office is on the factory floor

“At Keiser, we don’t just design our machines to be better, we build them to be better. We put them together with our own hands, under the leadership of my brother Randy, Executive Vice President and Head of Manufacturing”

- Dennis Keiser

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Attract and retain more members

with the unique capabilities of the A250 Leg Extension

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Attract and retain members with unmatched versatility
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Don’t lose members to injury and pain
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Member loyalty through faster results
plus
Worry-free operation — better member experience
plus
Make the most of your limited floor space

TRY KEISER STRENGTH FOR YOURSELF

One of our Demo Vans will bring two of our strength machines to any location in Mainland UK and Scottish Highlands. And we’ll bring other machines from our functional, racks, and cardio lines for you to try.

The A250 Leg Extension gives you an advantage

over those who train with conventional machines

TRY KEISER STRENGTH FOR YOURSELF

One of our Demo Vans will bring two of our strength machines to any location in Mainland UK and Scottish Highlands. And we’ll bring other machines from our functional, racks, and cardio lines for you to try.

Less pain, more patient visits

Improve patient experience with Keiser strength machines

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Build confidence faster with 1-pound increments
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Less patient pain, more patient visits
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Easy, precise eccentric overloading
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Restore functional power
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Better patient experience — get more referrals
plus
Make the most of your clinic's limited floor space
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Quiet operation is less disruptive and improves the patient experience

TRY KEISER STRENGTH FOR YOURSELF

One of our Demo Vans will bring two of our strength machines to any location in Mainland UK and Scottish Highlands. And we’ll bring other machines from our functional, racks, and cardio lines for you to try.

Be the clear choice for older adults

with the unique advantages of Keiser strength machines

plus
Designed around the needs of older adults
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Made for every fitness level and ability
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Pain-free range of motion. Lower risk of injury.
plus
Keiser is an effective tool in marketing your facility
plus
Make the most of your limited floor space
plus
Quiet operation

TRY KEISER STRENGTH FOR YOURSELF

One of our Demo Vans will bring two of our strength machines to any location in Mainland UK and Scottish Highlands. And we’ll bring other machines from our functional, racks, and cardio lines for you to try.