Measure your body composition with a DEXA scan

Kalos is a data science backed personal training service that uses DEXA technology to design customized exercise and nutrition "A/B tests" for our clients. We specialize in muscle growth and fat loss.

Our office is located at 98 Battery Street in downtown San Francisco.

Book YOUR FIRST DEXA SCAN

Each 30-Minute Kalos Session includes:

DEXA Scan

A full-length body composition scan on a 2024 DEXA machine.
(5 min)

Expert Interpretation

In-person review of your results with a certified personal trainer, including your body's top strengths and weaknesses.
(10 min)

Customized "A/B Test"

Day by day, customized, 8-week exercise & nutrition program based off your results
(15 min)

Priority Access

Access to our in-house app, including your nutrition journal, exercise tracking, wearable integration, and 24/7 access to your trainer.

About DEXA

The most sophisticated picture of your body


DEXA scans are the world's most accurate method of measuring your body fat, muscle mass, and bone strength.

Kalos is a personal training service, founded by Harvard-trained data scientists and NASM-certified personal trainers that uses DEXA technology to "A/B test" exercise and nutrition programs for our clients.

We test the impact of intermittent fasting or powerlifting with medical grade accuracy.

Trusted by the best

"We are really adamant that our patients get DEXA scans at least once a year. I think it’s a very important thing to be doing."

Peter Attia, M.D.
Author, Outlive

“In 5 minutes, DEXA gives a crystal-clear picture of mass imbalances that even outstanding physical therapists can miss after hours of observation."

Tim Ferriss
Author, The 4-Hour Body

"My DEXA scan this year had the lowest body fat on the team. It feels good to be competing with running backs on body fat."

Nick Bosa
Defensive End, San Francisco 49ers

We're located at 98 Battery Street, San Francisco.


Book a DEXA scan and a 30-minute consultation with one of our trainers today.

Book YOUR FIRST DEXA SCAN