A300 Leg Extension Pro
Model 1133
The quadriceps can produce very high forces at very fast speeds. That leaves the knee vulnerable to injury at high degrees of flexion. This machine lowers the resistance where the knee is most vulnerable to injury. Unlike conventional machines that use iron, the A300 Leg Extension Pro’s low‑inertia design gives you a smooth resistance. The result is a workout unlike anything else on the market.
The quadriceps can produce very high forces at very fast speeds. That leaves the knee vulnerable to injury at high degrees of flexion. This machine lowers the resistance where the knee is most vulnerable to injury. Unlike conventional machines that use iron, the A300 Leg Extension Pro’s low‑inertia design gives you a smooth resistance. The result is a workout unlike anything else on the market.
Features you won’t find in conventional machines
Unilateral movement means each limb can be trained symmetrically
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
Unilateral movement means each limb can be trained symmetrically
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
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 A300 Leg Extension Pro?
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
Older Adult
Keiser works for every level of fitness and will make your facility stand out.
Learn moreQuestions? 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 ConversationTRY 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.).
A) WIDTH: 39”/991 MM
B) HEIGHT: 45”/1143 MM
C) DEPTH: 40”/1016 MM
WEIGHT: 150 LBS/68 KG
RESISTANCE: 0 – 236 LBS/0 – 107 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)