MODEL 1721
A300 Arm Curl
MORE VERSATILE. MORE EFFECTIVE. SAFER.
A BETTER arm curl FOR EVERY BODY.
The finest in American engineering and manufacturing.
Made in U.S.A. with domestic and globally sourced material.
VERSATILITY
A More versatile arm curl
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 A300 Arm Curl, 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 A300 Arm Curl. 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 arm curl, 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.
A compound curve is designed for rotational motions such as a arm curl. Resistance increases in the middle of the movement. Then it reduces at the end of the motion.
Ideal Resistance
Muscles work at their maximum potential
We’ve programmed the ideal resistance curve for a arm curl into the A300 Arm Curl.
Less resistance where you’re weakest: On a arm curl, you’re stronger in the middle of the concentric phase. Keiser’s DVR optimizes your starting resistance with lower resistance.
More resistance where you’re strongest: As you move through the middle of concentric phase, you become mechanically stronger. Keiser DVR increases resistance to match your body’s natural strength curve.
Less resistance at the end of the motion: As you move toward the end of the concentric phase, you become mechanically weaker. Keiser DVR reduces 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.
Industry-leading lifespan and uptime.
Made in U.S.A. with domestic and globally sourced material.
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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’s Dynamic Variable Resistance eliminates that so your training is far less likely to cause injury.
Avoid repeated shock loading: The A300 Arm Curl 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.
POWER DISPLAY
Test. Track. Motivate.
The Power Display shows your level of effort with real-time power data (force x velocity) in watts.
Real-time Feedback
Motivate users with data that indicates their level of effort during training and rehabilitation.
Rep Counter
The Power Display makes exercise easier by keeping track of your reps for the current set.
Power Metrics
See your peak power for the set and the percentage of peak power for each rep in real time.
Maximum Power Testing
The Power Display can tell you the resistance level at which you generate the most power with a six-repetition test. This can be an important new metric in any power or velocity program.
Optimize resistance
Choose the precise resistance for your goals.
With one-pound or one-kilogram increments, ranging from 6 - 113 lbs / 3 - 51 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 starting resistance of zero 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 1721
A300 Arm Curl
Engineered to Perform. Built to last.
Innovative engineering. Solidly reliable. And simply more versatile.
A SAFER WAY TO BUILD BICEPS
The A250 Arm Curl’s smooth resistance lets you build your biceps in a safer way. It allows for easy positioning of the elbow to align with the exercise arm pivot, while the handle grips automatically adjust for your forearm length. The thumb button resistance control in each grip gives you full control of your resistance, allowing you to pyramid and eccentric overload. It’s perfect for people at any fitness level — from older adults to elite athletes.
Proven Durability. Lowest Cost of Ownership over time.
Made in U.S.A. with domestic and globally sourced material.
Features
Specifications
Bilateral movement for body symmetry training.
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:
38" / 965 mm
Width:
25" / 635 mm
Depth:
48" / 1219 mm
Weight:
107 lbs / 49 kg
Resistance:
6 - 113 lbs / 3 - 51 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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