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Sh!t About Movement
You Should Know
Sh!t About Movement You Should Know is the movement foundation of the Liminal Method. It explores how breathing, opposition, connection, grounding, transitions, structure, biomechanics, and nervous-system state shape movement and performance.
Foreword by
Patrick Sweeney, "The Fear Guru" and best-selling author of Fear is Fuel
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"Finally, a movement book that makes sense. Tracy breaks down complex biomechanics into something anyone can actually use."
Verified Amazon Reviewer
"Every coach and parent needs this on their shelf. The principles in here changed how I approach training."
Verified Amazon Reviewer
"Refreshingly direct. No fluff, just the stuff that actually matters for performance and longevity."
Verified Amazon Reviewer
27/30
MLB Organizations Served
25+
Years Developing the Method
40+
Podcasts & Speaking Events
6
Expert Contributing Authors
Why the Ski Industry Needs This
One ski resort implemented these principles.
After year one, they had zero reportable injuries.
This was a real-world implementation, not a controlled scientific study. Results reflect one season at a single pilot resort and are shared as an observation, not a guarantee.
0
Reportable Injuries After Year One (Pilot Ski Resort)
10.1
Injuries Per 100 Ski Area Employees (3rd Highest of Any U.S. Industry)
30%
Of Skiing Injuries Involve the Knee
15%
Of Skiing Injuries Are ACL Tears
The Problem
You're not training wrong.
You're missing the foundation.
Every approach helps. None are complete on their own. The result is a generation of athletes who are strong but inefficient, fast but fragile, and perpetually one injury away from a lost season.
The foundational gap
Most training models skip proper form in foundational movements before progressing to advanced work. Athletes build power on top of dysfunction.
The injury epidemic
Injuries from youth sports to pro sports are increasing year over year. The root cause isn't bad luck. It's movement patterns that were never corrected.
The information ceiling
Coaches and parents know something is off but can't pinpoint what. The science feels locked behind jargon, certifications, and expensive courses.
The Philosophy
It's not about the
positions you reach.
It's about the in-between.
The liminal space is the threshold. The transition. The space between where you are and where you're going. It's the most overlooked, undertrained, and misunderstood dimension of athletic performance.
Most training models focus on the destination: the end-range position, the max lift, the top speed. But elite movement isn't about the positions you can hold. It's about how efficiently you travel through the space between them. How smoothly you transition. How well your nervous system manages the chaos of the in-between.
This is the foundation of The Liminal Method. Where biomechanics meets nervous system regulation. Where the space between positions becomes the training itself. And this book is your guide to mastering it.
The Framework
Stop training positions. Start mastering movement.
Five principles that decode the complicated science into actionable, real-world practice. These principles are part of the five movement pillars of the Liminal Method: Breathing, Opposition, Connection, Grounding, and Transitions. Better performance. Fewer breakdowns. More power. More freedom.
Understand the System
See the whole picture, not just the pain.
Optimize the Basics
Breath, posture, grounding, and tension control.
Train the In-Between
Transitions, timing, and the moments that make or break you.
Reduce Energy Leaks
Move with more efficiency and resilience.
Perform Everywhere
Better movement on the field. Better life off the field.
What's Inside
The Five Movement Pillars
Every page builds on five foundational principles that decode the complicated science into actionable, real-world practice. These are the pillars of the Liminal Method.
Breathing
Breathing is where most people start leaking. The breath is the regulator. Everything downstream of it is compensating.
Opposition
Opposition is the conversation between opposite corners of your body. The diagonal system that powers efficient, resilient movement.
Connection
Connection is the thread between your joints, from the ground up. Where the chain communicates or breaks down.
Grounding
The ground is information. Your nervous system uses pressure through the feet and hands to organize everything upstream.
Transitions
Most training evaluates positions. The leak is usually in between them. That's where efficiency lives.
Most training evaluates positions. The leak is usually in between them.
When your system stops managing the space between demands, that's where efficiency lives. That's where most people are leaking energy without knowing it. This book shows you how to find it.
Excerpt from Sh!t About Movement You Should Know
The Results
Not theory. Proof.
The principles in this book aren't just concepts. They've been tested at the highest levels of sport with measurable, documented outcomes.
15x
Fewer days on the Injured List
4 days vs. 50-day league average
87%
Spent zero days on the IL
Of pro clients on the mobility series
0.63
ERA reduction for pitchers
Across the full season
2-5 mph
Velocity increase
48% of pitchers saw gains
80%
Increase in home run rate
69%
Pitchers increased K/9 rate
93%
Players promoted at least one level
0
Injuries all season, Angelo State D2 National Champs
The Author
The most uniquely
qualified voice in movement
Tracy Tanguay, known as "MobilityChick," is the only movement professional in the industry who integrates this many multi-faceted methodologies into intentional movement and mobility training.
Her background bridges neuroscience, cognitive science, and linguistics from Northwestern University with a professional research career at McKinsey & Company, then over 1,000 hours of specialized movement training across a dozen disciplines.
She has worked with players and coaches from 27 of 30 MLB organizations, from A-ball to All-Star, as well as NHL, PGA, Ironman, and ultra-marathon athletes. She prepared athletes for the Tokyo Olympic Games and helped Angelo State University go injury-free on their way to a D2 National Championship.
Credentials
Early Praise
What the experts are saying
Very few books make me rethink how the pieces of movement connect. This one did.
Lee Taft
"The Speed Guy" | World-Renowned Movement Specialist
The movement education I wish every athlete had before they ever stepped into a weight room.
Bryan King
Tampa Bay Rays | Head MLB Strength Coach
Complex movement science made understandable without watering it down. This book changes how you see the body.
Dr. Kevin Cota
New York Rangers | Former Physical Therapist Consultant
Collaborative Authority
Featuring international experts
Full chapters authored by leading professionals from professional sports organizations around the world. A multi-disciplinary guide unlike anything else available.
Andrew Hauser
World-renowned breathing and performance specialist
Philip Stotter
Authority on ground reaction force & biomechanics
Dr. Brett Winchester
Expert in developmental kinesiology & DNS
Dr. Ismael Gallo
Movement flow + performance specialist
Alan Jaeger
High-performance mindset coach
Bryan Eisenberg
NY Times best-selling author and consultant
Foreword by Patrick Sweeney, "The Fear Guru" and author of the best-seller Fear is Fuel
Who This Is For
Written for everyone who moves
Coaches
From youth rec leagues to professional staffs. Understand the 'why' behind the drills you already teach, and learn what you've been missing.
Parents
Give your kid the foundation they need. Stop guessing and start knowing what proper movement looks like and why it matters for their development.
Athletes
Feel the difference immediately. Fix the patterns holding you back, move better than you ever have, and stay healthy all season.
Trainers & Therapists
Add a new lens to your practice. Bridge biomechanics with nervous system regulation in a way no single certification teaches.
Featured On
A trusted voice in performance
Tracy has been featured on MLB.com and invited onto dozens of podcasts and speaking stages to share her approach to movement. Here are just a few:
Speaking
Invited to the biggest stages
From the American Baseball Coaches Association to international federations, Tracy is a sought-after speaker who translates complex movement science into actionable coaching.
ABCA '23, '24, '25
USA Baseball Coaches Clinic
CatcherCON
Swiss National Baseball
German National Baseball Association
Barnstormers Clinic at Boston College
TXHSBCA
VBCA
MHSBCA
Baseball Ontario
Runningman Festival
Questions
Frequently asked
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Movement Is One Layer
This book begins with the body.
The complete Liminal Method goes further, integrating movement optimization, nervous-system regulation, somatics, subconscious patterning, energetic work, and mind-body-soul integration.
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