MODEL 2531
A400 Leg Press
Better Data. More Versatile. More Effective. Safer. A Better leg press FOR EVERY BODY.
The finest in American engineering and manufacturing.
Made in U.S.A. with domestic and globally sourced material.
A400 Technology
Unlock training and Rehab potential with Precise, rep-by-rep data.
The A400 technology offers visual feedback and performance insights in real time.
And you can export A400 data for use in your analytics or records platform, whether it’s custom or off-the-shelf.
Power
See mean and peak power for each rep.
Velocity
See mean and peak velocity for each rep.
Range of Motion
See data for both concentric and eccentric phases for each rep.
Unilateral Comparison
See velocity and power data for left and right side by side on unilateral machines.
Make adjustments faster.
Real-time data unlocks progress.
Every workout can be a test.
Get testing data from every workout. Make program changes in real-time to optimize workout time and continue to progress.
Maximize performance with real-time, visual feedback.
Research indicates real-time visual feedback can increase athlete intent. A400 technology provides the feedback that inspires improved performance.
Quantify progress automatically.
Capture vast amounts of performance data in the weight room or clinic. A400 makes it easy to capture force, velocity, power, and range of motion to track progress.
Performance drop-offs show when to stop.
Set custom performance drop-off levels (e.g. 80% of peak power). See when more reps would produce diminished returns. Know when to end a set to save time and reduce risk.
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VERSATILITY
A More versatile leg press
Use a variety of training and rehabilitation methods to improve strength, speed, and power — all with one machine.
The Keiser Advantage
Keiser PRT
Conventional Iron
Strength
Power
Speed
Do more, more effectively.
The A400 Leg Press, with Pure Resistance Technology™ (PRT), gives you more training and rehab options. That’s because it’s more effective than iron at a wide variety of speeds.
More effective at faster tempos to improve velocity and power.
Just as effective at slower tempos
to improve strength.
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“Others build their machines like tanks. We build ours like aircraft — strong, but very light.”
DENNIS KEISER
Pure Resistance Technology™
Low-inertia design makes it more versatile.
Pure Resistance Technology (PRT) drives the design of the A400 Leg Press. We remove as much mass as possible to give you a pure, highly versatile resistance.
“Others build their machines like tanks. We build ours like aircraft — strong, but very light.”
DENNIS KEISER
LOW-INERTIA ARCHITECTURE
WE REMOVE ANY MASS WE DON’T NEED.
We engineer the linkages between you and the resistance to have as little mass as possible. With less mass, there’s less inertia and momentum.
PNEUMATIC RESISTANCE
A MORE VERSATILE ALTERNATIVE TO IRON
We use compressed air under digital control instead of iron resistance. It has almost no mass, inertia, or momentum. No matter how fast you move, you can’t throw it and you don’t have to slow it.
VERSATILITY
LOW-INERTIA MEANS MORE WAYS TO TRAIN AND REHAB, MORE EFFECTIVELY.
With almost no inertia, your resistance is more effective and safer at a wide variety of speeds. This gives you more ways to train and rehab.
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Dynamic variable Resistance (DVR)
Resistance that matches your strength curve.
On a leg press, you’re stronger at some points than at others. We optimize resistance throughout your range of motion. This makes your muscles work at their maximum potential across that range.
An ascending curve is designed for pushing motions such as a leg press. Resistance increases as you push further.
Ideal Resistance
Muscles work at their maximum potential
We’ve programmed the ideal resistance curve for a leg press into the A400 Leg Press.
Less resistance where you're weakest: On a leg press, you’re weakest at the beginning of the concentric phase. Keiser’s DVR optimizes your starting resistance with lower resistance.
More resistance where you’re strongest: As you continue through the concentric phase, you become mechanically stronger. Keiser DVR increases resistance to match your body’s natural strength curve.
VERSATILITY OF DVR
A Resistance Curve That Keeps Its Shape at Any Speed
Inertia and momentum distort iron’s resistance curve. The faster you go, the more it changes. Thanks to Pure Resistance Technology, Keiser’s DVR will match your body’s ability to produce force, no matter your speed or resistance setting.
The finest in American engineering and manufacturing.
Made in U.S.A. with domestic and globally sourced material.
Unilateral Movement
Train, Rehab, and Assess Left and Right Sides Independently
On the A400 Leg Press, the left and right sides move independently and provide separate data for each side.
A400 Technology
Identify unilateral imbalances.
Get data for each limb to identify problems that can lead to underperformance or injury. Data includes range of motion, velocity, and power.
Prevent unilateral compensation. Prevent the stronger limb from compensating for the weaker limb.
Repair unilateral imbalances. Train and rehab left and right sides independently. Improve symmetry of strength, power, velocity, endurance, and size over time.
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Prevent collateral damage with almost zero shock loading.
Iron's inertia and momentum may cause repeated stress on joints and connective tissue. Keiser eliminates that so your training is far less likely to cause injury.
Avoid repeated shock loading: The A400 Leg Press has virtually none of the sudden excess forces you get from iron.
Protect your joints: With almost no shock loading, you avoid much of the risk to joints and connective tissue over time.
Less pain when you work out: Without the shock loading of iron, you get all of the benefits of strength training with significantly less pain.
Optimize resistance
Choose the precise resistance for your goals.
With one-pound or one-kilogram increments, ranging from 0 - 924 lbs / 0 - 419 kg, it’s easy to find the right resistance level.
Optimize your resistance level. Set resistance at the precise level best for you and your goals.
Don’t wait for the next ten pounds. Continually challenge muscles with frequent, small increases in resistance.
Ideal when training for speed and power. Small increments are an important tool when training fast with lower resistance.
Perfect for rehab and reconditioning. One-pound increments and a low starting resistance help find the right resistance level to recover from injury or a deconditioned state.
Thumb-button Resistance Control
Change resistance on the fly during exercise.
Change resistance at any point during a rep with push-button convenience and digital precision.
Isometric overload made easy. Get into an isometric position, then increase resistance for isometric training.
Eccentric overload made easy. Increase resistance after the concentric phase of a rep.
Get rehab patients into position before adding load. This makes it easier to determine what resistance level the patient can achieve in tiny increments.
Model 2531
A400 Leg Press
Engineered to Perform. Built to last.
Innovative engineering. Solidly reliable. And simply more versatile.
EVALUATION ON EVERY REP
The A400 Leg Press is designed to optimize lower body strength training with smooth, pneumatic resistance. The higher foot plate increases hip flexion while decreasing knee flexion, which maximizes glute activation at the start of the movement. By reducing knee flexion, it helps minimize shearing forces, preserving the health of your knees. The separate foot plates allow you to train each leg independently, mimicking natural movement patterns and promoting balanced strength. Perfect for users of all fitness levels, the A400 Leg Press provides a safe, effective workout while tracking real-time performance metrics with Keiser's advanced technology.
Proven Durability. Lowest Cost of Ownership over time.
Made in U.S.A. with domestic and globally sourced material.
Features
Specifications
Offers unilateral movement – each limb can be trained symmetrically.
Increased resistance range for more intense functional workouts.
Smooth Keiser Dynamic Variable Resistance – fully adjustable to accommodate a wide range of users.
Large digital displays with resistance and counted repetitions.
Height:
48" / 1219 mm
Width:
36" / 914 mm
Depth:
69" / 1753 mm
Weight:
336 lbs / 152 kg
Resistance:
0 - 924 lbs / 0 - 419 kg
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Customize Equipment
Make it match. Make it yours.
Customize your order with your logo and colors to your team, brand, or the mood you want to create.
See this machine With your colors and logo.
Choose colors, apply your logo, and select accessories online with the Keiser Equipment Configurator.
Your logo
Add your logo or other custom artwork.
Upholstery colors
Select colors of both inner and outer upholstery panels.
Stitching color
Choose the thread color that joins your upholstery panels.
Paint colors
Choose colors of moving and non-moving parts.
EDUCATION SERVICES
Take full advantage of your equipment.
We’re dedicated to your success. We can help teach your team how to get the most from your equipment.
Online courses and certification
Enroll your team to learn the principles and practices behind training with Keiser equipment.
On-site training
Get live, on-site training to help you integrate Keiser into your existing programs.
Remote support
Get helpful, practical answers to your questions from our online community of Keiser users and educators.
Questions? Ask a rep.
Our nationwide team has a Keiser representative near you.
Get pricing
Request a price quote.
Ask about financing options
Easy business leasing available. Learn about attractive options that may be available to you.
Try our equipment
Your local rep can bring one of our Mobile Showrooms to you. Learn more.
Consult our cardio experts
Our market sector specialists understand your needs and have the answers for your questions.
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