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 training floor at Gryffon Performance, a private studio in Dallas, TX
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.

Coached strength training at Gryffon Performance in Dallas, where progress is reviewed and adjusted over time
A coaching session at Gryffon Performance in Dallas, where every client starts with a comprehensive assessment
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

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Lilian O profile picture
Lilian O
3 days ago
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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.
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Austin Widmyer profile picture
Austin Widmyer
5 days ago
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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!
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Raymond Rodela profile picture
Raymond Rodela
7 days ago
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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!
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Sandra Njemo profile picture
Sandra Njemo
7 days ago
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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!
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Ashieley J profile picture
Ashieley J
8 days ago
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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!
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Angelus Wilson profile picture
Angelus Wilson
8 days ago
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+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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Laquan Davis profile picture
Laquan Davis
8 days ago
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David is the truth! If you want someone who cares about your well-being and making sure you reach your goals, you’ve got the right person. He makes sure you’re not just lifting and getting stronger but also making sure you have the proper technique. I hate he had to move to Dallas.
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Tamara Wright profile picture
Tamara Wright
8 days ago
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I trained back with David when he was in Atlanta, and he was truly an expert in his craft! You rarely meet trainers that know about nutrition, how to properly stretch, and how each muscle group is connected within the body! I learned some invaluable information from him, and if you use him, I promise you will too! Follow the program, and you will see the results!
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Obi Asiama profile picture
Obi Asiama
8 days ago
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David changed the way I think about my body and my health. When I started with David, I was frustrated with my weight, lacked confidence in what I was doing, and honestly didn’t know enough about nutrition or training to make meaningful progress on my own. I didn’t have a meal plan, I didn’t really understand how to structure my workouts, and I was dealing with serious knee pain. I was wearing knee braces regularly just to get through workouts and everyday movement. From the beginning, David was honest with me about what it would take to actually change. He didn’t sell me a quick fix or make unrealistic promises. He taught me. He helped me understand what I was eating, how to train, how to build muscle, and how to approach my goals in a way that was sustainable. And throughout the entire process, he has been incredibly patient, honest, and genuinely invested in helping me improve. The physical transformation has been incredible. I’ve dropped at least 8% body fat while building real muscle. I can do things I never thought I could. But honestly, the change in my body composition is only part of what I’m most proud of. I DON’T WEAR A KNEE BRACE ANYMORE. I HAVEN’T BEEN INJURED IN OVER A YEAR. That might sound like a small thing, but for me, it’s huge. I’m a dancer and an athlete, so mobility and being able to actually use my body matter to me far more than simply seeing a smaller number on a scale. When I started, my knee pain was limiting the things I could do. Now I’m running faster, moving better, getting lower, and able to dance and train with a completely different level of confidence. The improvements in my running and mobility have been especially meaningful. I’m not just stronger in the gym—I’m moving better outside of it. The strength and stability I’ve built have carried over into my running, my dancing, and the way I move in general. I also notice better posture in my day to day life. I’m able to push myself physically without constantly thinking about whether my knees are going to give me trouble. And that’s what I appreciate most about working with David: he doesn’t just give you workouts. He gives you knowledge. I came in not really knowing what I was doing, and I’ve come out understanding much more about training, nutrition, recovery, and what it actually takes to change your body. David also has a way of dropping these little life nuggets and gems along the way that have nothing to do with your body and everything to do with your mindset and mentality. His own life experiences have clearly taught him a lot about discipline, resilience, and what it takes to succeed—and he’s incredibly generous about sharing those lessons. Sometimes you’re expecting to talk about your workout and walk away thinking about something much bigger. He’s honest when you need to hear it, encouraging when you need it, and willing to meet you where you are. There have been plenty of moments where I probably would have gotten frustrated or talked myself out of continuing, but David has consistently helped me stay focused on the bigger picture. I’m extremely grateful for the investment David has made in me and for everything I continue learning from him. Im seeing results and having fun along the way. I would recommend him to anyone who is serious about changing their life—not just changing their body.
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Dame Belden profile picture
Dame Belden
8 days ago
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Great experience trained with David for about a year my biggest thing was having someone there to push me and hold me accountable and he did that and more. I suffered a major leg injury which left me not being able to walk run or jump and David went out of his way to create a specific program for my injuries and got me all the way to full sprinting and jumping like non of my physical therapy had done for me. Great values, Great man couldn’t recommend him enough. 11/10 experience
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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.

David Gryffon, founder and head coach of Gryffon Performance in Dallas, TX

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.