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ABOUT TUNL

This isn't a clinic.
It's a 
commitment.

TUNL is a private rehab and performance practice in Boston's Seaport District, built on a single belief: that every person who walks through the door deserves a program that was built specifically for them — their body, their goals, their timeline. No templates. No assembly lines. No guesswork.

We exist because the standard model of physical therapy is broken for people who refuse to accept "good enough." Active people. Driven people. People who define themselves by what they do — and need a partner who understands what's actually at stake when they can't do it.

+

Years at Ripple Boston — Boston's premier performance PT clinic

+

Years coaching at Backyahd Boston alongside clinical practice

1 .

Program. Built from scratch. Specific to you. Every single time.

THE DOCTOR

DEGREE

Doctor of Physical Therapy
Tufts University School of Medicine

UNDERGRADUATE

B.S. Psychology & Pre-PT
Trinity College, Hartford

MOST RECENT ROLE

Clinic Director
Ripple Boston

Brookline, MA

COACHING

Fitness Coach
Backyahd Boston · 4+ years

Fitness

  • Past Collegiate Football Athlete at Trinity College 16-20'

  • Former NSCA All American 20'

  • Boston Hyrox Doubles 25'

  • Miami Hyrox Solo 26'

Dr. Negron, founder of TUNL Boston and creator of the Tunnel Method for physical therapy and performance training

Dr. Daniel Negron, DPT

Daniel didn't become a Doctor of Physical Therapy to hand people printouts and send them home. He became one because he understood, early on, that the gap between recovering from an injury and actually performing again was where most practitioners stopped — and where the real work begins.

 

After earning his Doctorate from Tufts University School of Medicine, Daniel joined Ripple Boston — one of the most respected performance PT practices in the city. Over nearly three years, he worked his way from staff Physical Therapist to Lead PT to Clinic Director, building a reputation for the kind of thorough, individualized care that kept clients coming back not because they were still injured, but because they were getting better than they'd ever been.

"The best compliment I can get isn't 'you fixed me.' It's 'I'm doing things I couldn't do before I got hurt.' That's the actual goal."

Alongside his clinical work, Daniel has spent four-plus years coaching at Backyahd Boston — a community training facility in the city that sharpened his eye for performance, movement quality, and what real athletes actually need to thrive. That dual lens — clinical precision and real-world coaching — is the foundation everything at TUNL is built on.

 

TUNL is the practice Daniel always wanted to build: private, unhurried, and relentlessly specific. One doctor. One client. One program. Every time.

Our Mission

“TUNL helps people move out of pain, build resilient bodies, and unlock the athlete within. We believe everyone is capable of more than they think—and our mission is to guide people toward realizing their true physical potential.”

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