Why Adaptive Resistance™

Get the perfect rep — every single time.

Adaptive Resistance Exercise™ dynamically adjusts in real time to deliver exactly the load you can handle — on every rep of every set.

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What Is Adaptive Resistance™?

Our breakthrough Adaptive Resistance™ technology uses patented, motorized resistance and computer software to give you the perfect workout every time.

Each repetition is perfectly matched, in both the push and pull motion, during your workout so that you receive the exact right amount of resistance automatically at every moment of your workout.

Fixed weight

Only truly hard at your weakest point in the rep.

Adaptive resistance

Maximal load on every inch — lifting and lowering.

Achieve The Perfect Rep

When you experience Adaptive Resistance™, your muscles are challenged on both the positive and negative portion of every rep to the exact level you are capable of at each moment.

Compared to traditional tools like weights, these optimal levels of resistance allow for improvements in strength, muscle mass, bone mineral density, and cardiovascular fitness to occur in just minutes per week compared to hours per week.

Use The Best To Be Your Best

ARX’s revolutionary technology has been quantifiably improving the lives of tens of thousands of people around the world for 15 years.

ARX is trusted by Tony Robbins, Dave Asprey, and Ben Greenfield — alongside the members of 100+ studios and clinics worldwide.

ARX vs weights

ARX Is More Effective and Efficient Than Weights

2×

Muscle Mass Gains

Muscle grows in response to the stress signal of resistance — and that signal is only as good as the resistance itself. ARX loads the muscle perfectly through every moment of every rep, maximizing the signal to grow.

90%

Greater Strength Gains

Strength is built by mechanical tension. ARX applies higher — but safe — tension than weights can, at every point in the range, so you get stronger across the whole movement, not just your sticking point.

72%

Less Training Time

Because every moment of every rep is fully loaded, no effort is wasted. That’s how the ARX group beat weights on all four measures while training 72% less.

2.5×

More Fat Loss

Every rep forces your muscles to burn large amounts of glycogen. That raises insulin sensitivity and lowers blood sugar — so your body stores less of what you eat as fat.

3.5×

Greater Cardio Fitness

Producing very high force demands a surge of blood and oxygen. Meeting that demand forces your cardiovascular system to expand its capacity — training the heart the way hard intervals do.

Hover any result to see the mechanism behind it.

All five figures come from a single 12-week randomized head-to-head study — ARX vs. traditional weight training. See the research ↓

These results are why members pay $250–600+/month for ARX-based training — and why 100+ studios and clinics have built businesses on it. Run a facility? See ARX for Business.

See it work

The most scientific training tour in fitness ends on an ARX.

When Will Tennyson tested the world’s most scientific workout machines for 1.3 million viewers, the machine that matched his maximum force on every inch of every rep — and painted the proof on screen in real time — was ARX. Five minutes of adaptive resistance doing what weights can’t.

Featured for 1.3M viewers

Will Tennyson · 5-min segment

The Research And Science Of Adaptive Resistance™

The following reports are from an independent study that was performed by the
Physiology Program at Western Colorado University:

The ACE-Commissioned Study: How Adaptive Training Compares to Traditional Resistance Training

Adaptive resistance exercise equipment uses AI to create workouts that are safe, controlled and fully quantifiable — but how do they compare to free weights and traditional machines? Researchers in the High Altitude Exercise Physiology Program at Western Colorado University set out to find the answer.

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Adaptive Resistance™ Training Is Superior to Traditional Resistance Exercise

Featured in the International Journal of Research in Exercise Physiology — a randomized, controlled study comparing muscular fitness, body-composition, and cardiorespiratory outcomes between Adaptive Resistance™ (ARX) and traditional moderate-intensity resistance exercise with weights.

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Beyond this commissioned study, ARX’s technology is also examined in the independent peer-reviewed literature — Sports Medicine (2023).

The Machines

Meet Our Two
Machines

Meet Alpha And Omni

Frequently asked questions

Why Adaptive Resistance™ FAQ

What is ARX?

How do you set the resistance while using ARX?

Who buys ARX?

What is the difference between the Alpha and the Omni?

How much space does ARX need?