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ABOUT ARC

Training and rehabilitation are not two separate disciplines. They are points on the same arc.

"The choices we make today will affect the kind of choices we can make tomorrow."

Most athletes experience a hard line between their S&C coach and their physical therapist. Two separate offices, two separate conversations, two sets of recommendations that don't always agree. ARC Performance Rehab exists because that separation doesn't serve the athlete.

We built ARC from a shared belief: that performance science and sports physical therapy speak the same language when practiced at a high enough level. Force production, movement quality, load tolerance, return to sport — these aren't different conversations. They're the same conversation, held across a continuum.

ARC is where that continuum lives. From the weight room to the clinic and back again — without losing the thread.

G. Harrison Smith
PhD candidate · MS · CSCS
Sport Scientist S&C Coach Professor Founder, VBTfit

I was a 90s kid who grew up doing everything physical. Nine years of martial arts, baseball, football through high school and college, a stint at rugby. As the levels got higher, sport became more regimented — the play got taken out of it. That's when my relationship with sport shifted. I started using it differently: as a pre-test post-test environment for my own training interventions. Leaning too heavily into powerlifting methods without the right balance made me slower on the field — finding emphasis models that developed multiple qualities simultaneously made me more well-rounded. Sport became the laboratory where the training hypotheses got tested.

Alongside the athletics I was finding philosophy through sport itself — the relationship between mind and body, how one shapes the other, how performance lives at that intersection. Space and flight fascinated me too — not as a career, but as a frontier. The unknown has always been more interesting than the settled.

My father was an engineer who worked on the Walt Disney Concert Hall and the Guggenheim. He digitized hand-drawn renderings and got CATIA and CAD working on projects where no one had a roadmap. What he taught me wasn't a work ethic — it was something more specific: focus on what excites you. The development is the journey.

That thread runs through everything I do now. Coaching elite sprinters, teaching at Mt. SAC, building VBTfit, finishing a PhD — it's all the same compulsion expressed across different surfaces. None of us have it figured out. We pursue what we enjoy and build from what we find.

Natalia Barajas
DPT · SCS · MS · CSCS
Sports PT Clinic Director Collegiate Athlete Bodybuilder Bilingual EN/ES

Sports and community were always at the center of Natalia's life. She competed in volleyball through college, stepped on a bodybuilding stage, and coached — both as a strength and conditioning coach and a sport coach at Mt. SAC. Through all of it she saw what life actually asks of people physically. She watched what happens when the body stops cooperating, when strength fades, when pain becomes the baseline. She watched it happen to her father.

That became the decision point. She didn't want to accept it passively. She wanted to understand the body well enough to change the outcome — for him, and for the people around her. That desire drove her from kinesiology at Whittier College through a master's in exercise science, into a doctorate in physical therapy at USC, and through a sports residency that took her onto the field at the CrossFit Games and into professional football with Angel City FC.

Today she runs a clinic, leads a team, and brings the same intent she started with — keep people strong, keep them capable, keep them in the game. At ARC, that clinical depth is what makes the performance work complete. Rehabilitation isn't the end of the athlete's arc. It's part of it.

CREDENTIALS
G. HARRISON SMITH — EDUCATION

PhD candidate

Health Sciences: Sport & Human Performance · Rocky Mountain University · ABD

MS Exercise Science

Dual concentration: Performance Enhancement & Rehabilitation Sciences · Cal U of Pennsylvania

BA Kinesiology

Whittier College
NATALIA BARAJAS — EDUCATION

Doctor of Physical Therapy (DPT)

University of Southern California

Sports PT Residency

University of Southern California

MS Exercise Science

Performance Enhancement & Injury Prevention · Cal U of Pennsylvania

BA Kinesiology

Whittier College
G. HARRISON SMITH — CERTIFICATIONS
NSCA Certified Strength & Conditioning Specialist (CSCS)
NASM Performance Enhancement Specialist (PES)
NASM Corrective Exercise Specialist (CES)
Functional Movement Screen (FMS)
NASE Certified Speed & Agility Coach (CSAC)
Altis Short Sprints · Altis Foundations
Force Plate · 3D Motion Capture · VO₂ & Lactate
IASTM · Yoga-Fit · USAW Level 1
NATALIA BARAJAS — CERTIFICATIONS
Board-Certified Sports Clinical Specialist (SCS)
Certified Strength & Conditioning Specialist (CSCS)
Licensed Physical Therapist — California
Advanced Manual Therapy
Return-to-Sport Testing & Protocols
Bilingual — English & Spanish
PUBLISHED
Reiner, S.L., Smith, G.H., & Davis, R.B. (2022). Exercise participation and subjective well-being of collegiate athletes during COVID-19. Journal of Human Sport and Exercise, 17(3).
PUBLISHED
Ellenbecker, T.S., Roetert, E.P., Petracek, K., Kovacs, M., Barajas, N., & Bailie, D. (2022). Bilateral comparison of anterior shoulder position in elite tennis players. International Journal of Sports Physical Therapy.
IN REVIEW
Ellenbecker, T.S., Barajas, N., Smith, G.H., et al. Acute effects of Thera-Band kinesiology tape on glenohumeral joint isometric rotational strength.
IN PREP
Smith, G.H. Validity of a smartphone-based computer vision app for assessing CMJ metrics against force plate analysis. JSCR.
IN PREP
Smith, G.H. Sex-based differences in CMJ strategy and performance using a validated smartphone-based velocity tracking app. JSCR.
EXPERIENCE
2016 – PRESENT
On Athletics Club
Sport Scientist · S&C Coach
Applied sport science for elite sprinters including national 100m champions. Load-velocity profiling with 1080 Sprint, CMJ and reactive strength assessment with Hawkin Dynamics, individualized force-velocity profiles.
2016 – PRESENT
Mt. San Antonio College
Adjunct Professor · Head S&C Coach
Teaching Exercise Physiology in Fitness, Applied Kinesiology, Fitness Testing, and Principles & Techniques of S&C. Head S&C Coach for volleyball, basketball, and soccer.
2019 – PRESENT
VBTfit · Kinematic Coach LLC
Founder
Built the first smartphone app with live VBT feedback. Validated against force plate technology across 18 CMJ variables in 44 collegiate athletes.
2023 – PRESENT
California Rehabilitation and Sports Therapy
Clinic Director · Physical Therapist — Natalia Barajas
Leading daily clinic operations, staff development, and quality assurance. Implementing evidence-based treatment plans for orthopedic and sports-related injuries.
2022 – 2023
University of Southern California · Evolution PT
Sports PT Resident — Natalia Barajas
600+ hours of on-field coverage. On-site PT at the CrossFit Games and Angel City FC. Return-to-sport testing protocols and interdisciplinary collaboration.
2024 – PRESENT
GuildMMA · Team USA Pankration
Performance Analyst
Performance analytics for amateur MMA and Team USA Pankration athletes. VBT, force-time profiling, and readiness monitoring for combat sport preparation.
2017 – PRESENT
Private Coaching
Personal & Performance Coach
Individual coaching for NFL athletes, professional track & field athletes, Olympic weightlifters, MMA fighters, and general population.
2011 – 2017
Commercial Fitness Leadership
Personal Trainer → Training Manager · LA Fitness / Equinox
Managed training operations across 2 districts and 12 gyms. Set a new net revenue record. Maintained 350+ client relationships with high retention.