About David 'Arm' Barr

David Arm Barr ArmBarr.com

Mission: To advance the fields of human performance through high fidelity, intellectually honest applied science.

David 'Arm' Barr shares his 30 years of training, research, and fitness industry experiences to help you:

1) Build Muscle
2) Lose Fat
3) Perform Better

Sound too good to be true? Read the FAQ

David's Textbook Publications

NSCA's Guide to Sport and Exercise Nutrition - 2nd Ed.

(Available Now!)

NSCA Nutrition Textbook

Nutritional Supplements in Sports and Exercise - 2nd Ed.

Carbs in Exercise

Dietary Protein and Resistance Exercise

Protein and Exercise

Research and Work Experience

  • NASA - Johnson Space Center
  • T-Nation/Biotest
  • Muscle & Fitness
  • NSCA
  • ACSM
  • EXAMINE.com Research Digest
  • PPSC - Pain-free Performance Specialist Certification

Qualifications: MSc., CSCS, PPSC, CISSN, RSCC


Did you really work at NASA?

Yes, this was a career highlight! I conducted muscle wasting research at NASA’s Johnson Space Center. The experience was incredible, but more importantly, in Chapter 8 I show you how to use the result of that research to improve your own recovery.

Why have you been described as the Elon Musk of fitness?

It wasn’t an entirely flattering comparison, but like Elon Musk, in addition to the NASA-space connection, I have Asperger’s syndrome and the ‘unusual’ sense of humor that comes with it. Also like Elon, our results are achieved by applying the 2 benefits of Asperger’s:

  • we think differently about solving problems*
  • we do so obsessively

The result is a Massive upgrade to existing methods, along with new innovations to make your gains come faster.

*I even kick off Chapter 1 by quickly showing you the power that comes from reverse engineering a problem (aka Musk’s First Principles approach), which you then get to apply using the rest of the book.

Are your arms really as big as they seem in the banner?

Absolutely not. I was playing with poses during a workout and stumbled on the old childhood trick of pushing my arm against my knee. I’m still a meathead at heart and liked the way it looked. As a bonus, it helps me to take a shot at the standard BS hyperbole of the industry, which is the antithesis of my mission.

David Arm Barr; arms without the push
a version without the push

You’re very handsome, but did you just make this question up?


David, what is best in life?

Teaching and presenting -sharing and learning from others- is my greatest joy in life (which I share through my YouTube channel and Blog). From deep-dive presentations at science conferences to hands-on personal training instruction, my goal is to educate through entertainment and storytelling.

David Arm Barr Teaching
Having fun, presenting at a Personal Trainer Conference


Check out the Blog for more!