Why longevity researchers are paying attention to adaptive resistance

A $101M global competition to reverse biological aging is underway — and the exercise arm of one semifinalist study is built on the training category ARX pioneered. Here’s why the science of aging keeps landing on adaptive resistance.

A $101M bet on reversing biological age

XPRIZE Healthspan is a global, multi-year competition offering $101 million for therapies that restore muscle, cognitive and immune function — by a minimum of 10 years, with a goal of 20. Among the semifinalists: ASU Team Healthspan, one of only 100 teams selected from 765 applicants worldwide, now running an eight-week clinical pilot with 20 participants aged 55 and up — with a 200-participant, full-year trial on the horizon for teams that advance.

Their intervention has three arms: nutrition, hyperbaric oxygen therapy, and exercise. ASU describes the exercise arm as “AI-driven, adaptive resistance training, designed to maximize functional gains in minimal time.”

ARX machines are used in that training arm. To be precise about what that means: ARX is the equipment, not a competitor in the XPRIZE, not a sponsor — and neither XPRIZE nor ASU endorses products. The machines being used in a marquee longevity study is simply a fact, and a telling one.

What adaptive resistance is, in one paragraph

Adaptive Resistance Exercise™ is motorized, computer-controlled resistance that matches your exact force on every inch of every rep — no weight stacks, no momentum, and a precise force reading on every repetition. ARX pioneered the category and has built it for 15 years. If you want the full mechanics, read the complete guide to Adaptive Resistance™ or see how it works.

Why researchers keep landing on it

Look at what an aging study needs from its exercise arm, and the category choice starts explaining itself:

It’s measurable. Research runs on quantified dose and response. Adaptive resistance produces force data on every rep of every session — the training equivalent of lab-grade instrumentation, where a barbell workout is a guess.

It’s time-efficient. ASU’s own framing — “maximize functional gains in minimal time” — is the same property ARX’s published research found: in the ACE-commissioned Western Colorado University study, the ARX group matched and beat traditional training outcomes while spending 72% less time exercising.

It scales safely to older adults. The resistance only ever matches the force you produce — which is what makes hard training tolerable for the 55+ participants an aging study needs.

And the biomarkers the study tracks — grip strength, gait speed, VO₂ max, immune and cognitive function — are exactly the ones strength training moves. In the ACE study, ARX training produced a 3.5× greater VO₂ max gain and 90% more strength than traditional weight training.

The proof that’s already published

The XPRIZE study hasn’t reported results — when it does, they belong to the researchers. But ARX’s own evidence is already on the record: the ACE-commissioned Western Colorado University study, published in the International Journal of Research in Exercise Physiology, found 2.5× more fat loss, 2× more muscle, 3.5× greater VO₂ max gain, 90% more strength — in 72% less time than traditional weight training. ARX’s machines are also among those examined in a 2023 Sports Medicine review of the category.

What it means for you

If you run a studio, gym, or clinic: the fastest-growing demand in fitness — longevity clients, GLP-1 users protecting muscle, 55+ members — is being validated by the most serious research money in the field, on the category of equipment you can put on your floor. See ARX for business.

If you’re building your own healthspan: the biomarkers this study tracks are the same ones you can train at home in two 15-minute sessions a week. See ARX for longevity.

The full research story — with sources and straight answers on what “used in the study” does and doesn’t mean — lives on our research page.