Jeff Cavaliere
Jeff Cavaliere is the physical therapist and strength coach behind ATHLEAN-X, sharing workouts, exercise technique and nutrition through videos and training programs.
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Latest
Jeff’s happenings, collected from public sources, plus his backstory and Starbook, where fans write.
Known for
ATHLEAN-X
YouTube
Huberman LabOverview
- Known as
- The creator of ATHLEAN-X
- Work
- Physical therapist, strength coach and fitness educator
- Education
- University of Connecticut: bachelor’s in physioneurobiology/premedicine and master’s in physical therapy
- Before YouTube
- New York Mets head physical therapist and assistant strength coach, 2006–2008
- Online beginnings
- Started publishing ATHLEAN-X videos in 2009
Mini bio
Before the camera.
Jeff’s route into fitness began with studying the body. He earned degrees at the University of Connecticut, then worked as the New York Mets’ head physical therapist and assistant strength coach from 2006 to 2008. His official biography names players he coached, including Tom Glavine, Pedro Martinez and David Wright.
How ATHLEAN-X grew.
In his own account for YouTube, Jeff dates his first ATHLEAN-X uploads to 2009. He initially taught athletic skills such as throwing faster and hitting harder. As more people found the videos, he broadened his focus to helping everyday viewers build muscle, strength and confidence in movement. YouTube reported that the main channel had passed 12 million subscribers in September 2021.
What fans come for.
His videos connect exercise demonstrations with explanations of anatomy and technique. Structured programs such as AX-1 extend that teaching into a training plan. His 2026 Huberman Lab appearance explored the smaller muscles, movement habits and practical choices that support years of training.
Creditschronological, newest first
Interviews and podcasts
- 2026Huberman Lab: Build Muscle, Great Posture & Resilience to InjuryGuest
- 2026Huberman Lab Essentials: Optimize Your Exercise Program with Science-Based ToolsFeatured guest in an edited archive conversation
- 2021YouTube Creator VoicesGuest essay author
Fitness videos
- 2018The PERFECT Chest Workout (Sets and Reps Included)Host and coach
- 2009–presentATHLEAN-XCreator and host
Professional sport
- 2006–2008New York MetsHead physical therapist and assistant strength coach
Quotes
The important thing is not where you start but what you build up to.Jeff Cavaliere, UConn Magazine
Speaking about maintaining fitness and building strength as he gets older in a 2026 interview.
Trivia
- His older sister Amy’s work in physical therapy helped inspire his move away from a pre-med track.
- In his 2021 YouTube essay, he described family time and walks with his four black Labradors as ways to recharge.
- An official behind-the-scenes video reveals that he plays piano and enjoys carrot cake.
Find Jeff
Follow Jeff for new workouts, technique breakdowns and a look inside ATHLEAN-X.
Are you Jeff Cavaliere?
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