STRENGTH & PERFORMANCE COACHING IN DALLAS, TX

GET STRONG.
STAY CAPABLE.

In-person strength and performance coaching in Dallas. Structured training, personalized nutrition coaching, and a comprehensive assessment that starts you in the right place. Private 15,000 square foot studio in the Dallas Design District.

DALLAS, TEXAS · STRENGTH AND PERFORMANCE COACHING · PERSONALIZED NUTRITION COACHING

RESULTS FOCUSED

Coaching decisions built on a comprehensive assessment. Measured, not guessed.

EVERY CLIENT

Personalized nutrition coaching included for every coaching client.

DALLAS, TX

Private 15,000 square foot studio. Professional-friendly scheduling, Monday through Sunday.

THIS ISN'T A GYM.

IT'S A STANDARD.

Gryffon Performance is a results-based coaching business for people who are serious about becoming stronger, leaner, and more capable. Every client trains with structure, personalized nutrition coaching, and coaching decisions built on a comprehensive assessment, so progress is measured, not guessed.

Not a public gym floor. No drop-ins, no open classes. A private 15,000 square foot studio built for coaching and nothing else, backed by 40+ five-star Google reviews.

THE CORE COACHING SYSTEM

BUILT ON THREE PILLARS

01

STRUCTURED STRENGTH TRAINING

Structured strength and performance coaching that builds a durable, capable body for life, not just the gym.

02

PERSONALIZED NUTRITION COACHING

Personalized nutrition coaching aligned with your goals, schedule, and real life. Included for every client.

03

MEASURABLE PROGRESS

Ongoing review and adjustment so progress never stalls. Measured, not guessed.

OUR SERVICES

BUILT AROUND YOU

PERSONAL TRAINING

Coached training built around your goals, ability, and schedule, so every session moves you forward.

BODY RECOMPOSITION & FAT LOSS

Get leaner while getting stronger. Sustainable change built on training, nutrition, and accountability.

STRENGTH & PERFORMANCE

Structured strength and performance coaching that builds a durable, capable body for life, not just the gym.

NUTRITION COACHING

Personalized nutrition coaching aligned with your goals, schedule, and real life. Included for every client.

REAL PEOPLE. REAL RESULTS.

Verified reviews, client stories, and documented progress.

MEASURABLE PROGRESS

Ongoing review and adjustment so progress never stalls. Coaching decisions built on a comprehensive assessment, so progress is measured, not guessed.

START IN THE RIGHT PLACE

GOOD COACHING BEGINS WITH UNDERSTANDING YOU.

Every Gryffon Performance client begins with a comprehensive assessment covering your goals, lifestyle, schedule, training history, current ability, and any joint concerns, so coaching decisions are informed from day one. No guesswork. No generic starting point.

WHO THIS IS FOR

TWO KINDS OF CLIENT. ONE STANDARD.

THE PROFESSIONAL

You’ve built a career and a full life. Now you want a body that keeps up. Structured coaching that fits a demanding schedule and delivers measurable results without taking over your life.

THE PERFORMANCE-MINDED CLIENT

You train with purpose. You want strength and performance coaching with real structure, building a durable, capable body that performs at a higher level, in the gym and beyond it.

HOW IT WORKS

A CLEAR PATH FORWARD

01

APPLY FOR COACHING

Submit your application. We respond within 24 hours.

02

COMPLETE THE ASSESSMENT

A comprehensive assessment so coaching starts in the right place.

03

BEGIN STRUCTURED COACHING

Structured coaching with personalized nutrition, built around you.

04

MEASURE AND ADJUST

Ongoing review and adjustment so progress never stalls.

Rated 5 out of 5

WHAT OUR CLIENTS SAY

      
 
 
      Posted on Google  
   
   Oriole Le 
 5 days ago
 
 
 Trustindex verifies that the original source of the review is Google. I've had the pleasure of training with David for the past year! He's incredibly knowledgeable, patient, and detail-oriented when it comes to strength training. What really sets him apart is his attention to proper form and technique. He takes the time to explain movements, correct your form, and help you build confidence as you progress. He brings positive energy to every session and knows how to challenge you at your own pace. If you're looking for a trainer who prioritizes proper form, safety, and building a strong foundation, David is your guy!
  
 
     Posted on Google  
   
   Michelle Lamar 
 5 days ago
 
 
 Trustindex verifies that the original source of the review is Google. I would highly recommend David as a trainer! I had the pleasure of training with him (virtually) and still received amazing results and the same amount of time and dedication as his in person coaching. Not only was I provided with weekly workouts and nutritional guidance but we had weekly check-ins for video calls where we would go over my weekly progress, form, questions and concerns. I never once felt left out to dry and my results were amazing! He most definitely walks you through everything and makes sure you understand the process based on your goals!
  
 
     Posted on Google  
   
   Ashley Prange 
 11 days ago
 
 
 Trustindex verifies that the original source of the review is Google. David is a great coach and mentor. He takes the time to learn clients needs and implement them into a workout that is efficient and enjoyable. I have seen noticeable changes in how I feel and how I move within my sport!
  
 
     Posted on Google  
   
   LaShanda M 
 12 days ago
 
 
 Trustindex verifies that the original source of the review is Google. David is professional, knowledgeable, motivating, and genuinely passionate about helping his clients reach their fitness goals. What stands out most is his dedication, patience, and ability to push you beyond your comfort zone while making sure you feel supported and encouraged throughout the process. His personalized approach to training, extreme attention to detail, and commitment to building confidence and consistency make all the difference. It's not just about physical transformation; it's about developing discipline, strength, and a healthier mindset.
  
 
     Posted on Google  
   
   Lilian O 
 18 days ago
 
 
 Trustindex verifies that the original source of the review is Google. I started training with David in February of this year. It was my first time using a trainer after not being active for almost 3 years. I highly recommend David, especially if you’re new to strength training. He’s knowledgeable and patient when learning new workouts. Since starting I’ve definitely seen a huge improvement in my strength and also my core. I was also able to lose 40lb while training with him. Highly recommend especially if you’ve ever felt intimidated by weights.
  
 
     Posted on Google  
   
   Austin Widmyer 
 20 days ago
 
 
 Trustindex verifies that the original source of the review is Google. David is an expert on nutrition, fitness, motivation, and mobility. Many personal trainers over focus on one aspect of being a trainer and neglect the others, but David is the full package. I’ve personally watched David develop his physique over the years and apply that knowledge to myself and countless others. He will get you to where you want to be if you follow his training. He will tell you how it is, not what you want to hear. He’s helped me diagnose and fix injuries and mobility issues better than physical therapists. I can’t recommend him enough!
  
 
     Posted on Google  
   
   Raymond Rodela 
 22 days ago
 
 
 Trustindex verifies that the original source of the review is Google. David has definitely changed my life for the better. Working with him has been an eye opening experience, he doesn’t just train you he gets technical and breaks the science around working out. And if you’ve been working on your nervous system he’s the ultimate go to. From personalized nutrition plans to fun banters in our sessions I can’t recommend him enough!
  
 
     Posted on Google  
   
   Sandra Njemo 
 22 days ago
 
 
 Trustindex verifies that the original source of the review is Google. David is an exceptional personal trainer who guided me through losing 76 pounds postpartum. Every mom knows how challenging postpartum weight loss and body recomposition can be after having a baby, and David has been an incredible coach, motivator, and educator throughout my entire fitness journey. He prioritizes proper form, functional movement, and a deep understanding of nutritional science. Whenever I experienced joint pain or shoulder tightness, he immediately adapted our workouts with targeted corrective exercises and mobility stretches to alleviate discomfort safely. Thanks to his customized strength training program and holistic approach to postpartum health, I achieved major weight loss while maintaining skin elasticity and muscle tone. If you are a mother looking for a top-tier, highly knowledgeable, and professional private personal trainer in the Dallas area, I cannot recommend David enough!
  
 
     Posted on Google  
   
   Ashieley J 
 23 days ago
 
 
 Trustindex verifies that the original source of the review is Google. Training with David has transformed not only my physique but my lifestyle in general. He did more than just structure my workouts. He explained the process, the reasons behind the movements and general knowledge about nutrition, macros, building strength and maintaining results. He’s always professional, has never cancelled, reliable, super knowledgeable, and personable. Thanks David and see you next time!
  
 
     Posted on Google  
   
   Angelus Wilson 
 23 days ago
 
 
 Trustindex verifies that the original source of the review is Google. +2
Got me right !!! 40lb weight difference. My nutrition and meal planning was horrible , David was very helpful even has an app to track food . With a proper workout routine and a nutrition plan you’ll get the best results. Highly recommend
  
 
 
  
 
 
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MEET THE FOUNDER

MEET DAVID GRYFFON

David Gryffon is the founder and head coach of Gryffon Performance, a Dallas strength and performance coaching business built around one belief: training should prepare you to be more capable in every area of life. A lifelong student of strength, athletic performance, nutrition, and business, David continues to train seriously himself while balancing life as a husband, father, coach, and business owner.

He understands that most clients are not professional athletes. They are busy people who want to look better, feel stronger, move with confidence, and perform at a higher level without letting fitness take over their lives. His philosophy is to understand the entire person, including goals, lifestyle, schedule, training history, current ability, and joint concerns, before deciding how they should train.

READY TO BECOME YOUR STRONGEST SELF?

Serious goals deserve a thoughtful starting point. Apply for coaching, complete your comprehensive assessment, and begin structured coaching with personalized nutrition.