Strength & Longevity

Muscle is the organ of longevity.

After your 30s, the muscle and strength you keep are among the biggest levers on how long — and how well — you live. ARX’s patented, computer-controlled strength machines build them faster, safer, and in far less time than weights.

Talk to ARX See the science ↓

One set. To failure.

Ben Greenfield’s entire workout is one all-out set.

Bestselling author and one of the most influential voices in health & longevity — watch what a single set to failure looks like when the machine matches your maximum force on every inch of the rep.

Ben Greenfield · author & longevity voice

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The muscle problem

You lose muscle every year you don’t fight for it — and now it’s accelerating.

Age quietly takes it

Starting in your 30s, adults lose muscle mass and strength every decade — a slide called sarcopenia that erodes metabolism, bone density, balance, and independence long before you feel it.

GLP-1 speeds it up

The GLP-1 medications millions of people now take drive fast weight loss — and a meaningful share of that loss is lean muscle. Clinicians increasingly urge anyone on them to strength-train to protect the muscle they’d otherwise give up — and for studios and clinics, that makes GLP-1 clients part of the fastest-growing demand in fitness.

The fix, in every case, is the same: resistance training. The real question is how to do it effectively, safely, and consistently — for years.

Why strength is the lever

Strength touches almost everything that keeps you healthy and independent.

Metabolic healthMuscle is where your body burns glucose and stores energy — more of it supports better blood sugar and insulin sensitivity.

Bone densityLoading your muscles loads your bones. Resistance training is one of the few things proven to build bone as you age.

Cardiovascular fitnessIn an independent university study, VO₂ max — one of the strongest predictors of lifespan — improved 3.5× more than with weights.

IndependenceStrength and balance are what let you lift, climb, catch yourself, and stay out of a care facility later in life.

Why ARX

The only machines with patented, computer-controlled Adaptive Resistance Exercise™.

Now used in the training arm of the ASU Team Healthspan XPRIZE Healthspan study — the research story →

ARX’s patented Adaptive Resistance™ is built on the three pillars ARX has always stood on — efficient, effective, and safe: real results, in a workout short enough to keep for life, with none of the injury risk of heavy weights.

EfficientA complete, full-body workout in about 15 minutes, twice a week. Short enough that people actually stick with it — and the only training that works is the training you keep doing.

EffectiveAdaptive Resistance meets your true strength on every rep — including the lowering (eccentric) phase ordinary weights can’t load. In the study it built more muscle and strength than weights in a fraction of the time — and it measures every rep, so you can watch your strength climb.

SafeNo free weights to drop, no heavy loads to fail under. Motorized resistance meets exactly the force you produce — which makes it ideal for older, deconditioned, or GLP-1 clients.

2×more muscle gained vs. weights

3.5×greater VO₂ max improvement

90%greater strength gains

72%less time than weights

Independently proven vs. traditional weights over 12 weeks — ACE-commissioned, university-run, peer-reviewed.*

Where do you fit?

Put ARX to work — for your studio, gym, clinic, or med-spa, or for your own longevity.

For your business

The longevity and GLP-1 wave is the fastest-growing demand in fitness. Members pay $250–600+ per month for ARX-based training — around 100 members is a six-figure annual business on under 40 square feet, with no franchise fees or royalties. Some operators break even in month one.

See the business case → For your home

Own the most efficient, joint-safe strength tool made — and give yourself, and the people you love, the muscle that carries you into later life.

Explore ARX at home →

Muscle is the organ of longevity.

Ben Greenfield’s entire workout is one all-out set.

Age quietly takes it

GLP-1 speeds it up

Build strength that lasts.