Look good naked. Perform at your peak. Die young as late as possible.

We combine advanced biometrics, proprietary AI, and expert coaching to deliver elite fitness, performance, and longevity—tailored precisely to you.

That's A3. Fitness, improved.


 

Want to get started?
Come in for a free, in-depth Health & Performance Assessment —
so you know exactly where you’re starting,
and how to improve.

 

Outperform Coaching

Our personalized coaching starts with deep biometrics — from blood panels, DEXA scans, and DNA sequencing, to wearable data, VO₂max, and strength testing.

Proprietary AI turns those insights into a precision plan for training, nutrition, supplementation, and recovery.

Your dedicated coach then helps you execute that plan, adapt it in real time, and stay on track for lasting results.

Learn about Outperform

Reboot Gym

Many NYC-based members also train with us at Reboot — our private, data-driven gym in Midtown, built for serious results.

Here, you’ll work 1-on-1 with expert coaches to execute your Outperform program with precision, safety, and efficiency.

Every session is purpose-driven, every movement informed by your data, and every detail engineered for faster, more sustainable progress.

Learn about Reboot


Results that Speak for Themselves

+12–18%
VO₂max
+8–15%
Strength
+2–4 lbs
Lean Muscle
−2–5 pts
Body Fat %
−4–8 bpm
Resting HR
−1.5–3 yrs
Biological Age
−0.2–0.4%
HbA1c
+5-12%
Sleep Efficiency

The A3 Advantage

Advanced biometrics, proprietary AI, and expert coaching—integrated into a single system that delivers visible results fast, and meaningful health gains long-term.

Deep Biometrics

Blood panels, DEXA, DNA and microbiome sequencing, VO₂max & strength testing, wearable data, and more give us a precise starting point.

Proprietary AI

Our system analyzes your data and prioritizes the few changes that will move the needle fastest for you.

Expert Coaching

Work with industry-leading coaches for 1‑on‑1 guidance to implement, adapt in real time, and sustain progress—without guesswork.


What Our Clients Say

“A3 has changed the way I think about fitness and health.”

— Clay DeGiacinto
Managing Partner & CIO, Axonic Capital

“Every workout and habit has made a real impact. I can’t recommend A3 highly enough for anyone serious about longevity and health.”

— Robert Den
Chief Medical Officer, Alpha Tau

“This is the only thing that keeps me in shape.”

— Matt Giannini
Managing Partner, Biz Dev, Citadel

Where Do We Go from Here?

Book your free Health & Performance Assessment to get your baseline and roadmap.

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