“When I started working with Coach Greg, the idea of running a full marathon—my first one—felt pretty intimidating. Now, I genuinely believe I can do it.”
Running CoachingPersonalized race preparation • Lexington + online
Train with purpose for your next finish line.
Personalized running coaching that brings your mileage, pacing, strength, mobility, fueling, and recovery together—so you arrive at race day prepared.
A short application. Greg reviews every response personally.
10+years coaching
200+clients helped
ACEcertified trainer
Built for your finish lineYour training, built around your life.
How it works
A clear next step toward your race.
- 01ApplyTell Greg your goal and biggest challenge.
- 02CallTalk through your training and whether coaching fits.
- 03PlanGet a personalized approach if you work together.
Client reviews
What it feels like to train with Greg.
Real experiences from runners and fitness clients, in their own words.
“We continue to meet goals and I feel stronger every week! I am getting closer and closer to my goal of completing my first marathon.”
“With his guidance, I’ve been back into the workout scene and gaining more confidence and strength each day.”
“I am brand new to the workout world and Greg has been amazing. He is patient and offers the best explanations. Greg is positive, supportive, and easygoing. Highly recommend him!”
“I have been working with Greg for nearly two years and seen incredible growth and success during my fitness journey. His motivational skills are unparalleled, always pushing me to give my best.”
“We’ve been together for nearly two and a half years with very good progression and no injury. If you are committed, he’s a great accountability coach and training partner.”
Individual experiences vary. These are client testimonials.
More miles are not always the answer
Your training should build toward one clear race-day goal.
Running every workout too hard
Easy days become moderate, recovery suffers, and the workouts that matter never feel sharp.
Following mileage without context
A generic calendar cannot account for your schedule, recovery, injury history, or how training is actually going.
Leaving strength and fueling to chance
The pieces that keep you durable and energized get ignored until late in the training cycle.
The GTB method
Build fitness. Practice the details. Peak on time.
Your race plan is built around your current fitness, schedule, recovery, and goal—not copied from a generic calendar.
Run with the right purpose
Easy runs, quality sessions, and long runs are paced and progressed for the result each workout needs to create.
Build race-day durability
Runner-specific strength and mobility support your mileage without competing with your key runs.
Practice fueling before race day
Use long runs to find the hydration and fueling approach your body can trust when it matters.
Adjust from real feedback
Your plan evolves with fatigue, soreness, missed sessions, weather, travel, and the progress you are making.
“
The goal isn’t to prove how hard you can push today. It’s to build a runner who can keep showing up tomorrow.
— The GTB Performance coaching philosophy
Choose your finish line
One coaching approach, personalized to your race.
Start with the path that best matches the distance and challenge in front of you.
PRIMARY RACE-PREP COACHING
Online Marathon Coaching
Personalized mileage, pacing, long runs, strength, mobility, fueling, and weekly adjustments wherever you train.
Explore online marathon coaching →LEXINGTONRunning Coach in Lexington, KY
Local, personalized coaching for new and returning runners.
Explore coaching →YOUR FIRST FINISH LINEBeginner 5K Coaching
A progressive path from short run-walk intervals to your first 5K.
Explore coaching →TRAIN ANYWHEREOnline Running Coach
Personalized workouts, feedback, and accountability nationwide.
Explore coaching →Other ways to get started: running and weight-loss coaching, the free Marathon Wall-Proof Checklist, the First 5K Guide, or the Lexington First 5K Guide. For training advice, read how to lift around long runs and what to do after a missed week.
Your coach
Hi, I’m Greg.
I’m an ACE-certified personal trainer and running coach with more than 10 years of experience helping everyday runners prepare for meaningful finish lines.
You do not need elite speed or unlimited training time. You need a plan that fits your real life, connects every part of race preparation, and changes when your training calls for it.
- Personalized weekly running and race preparation
- Strength, mobility, fueling, and recovery support
- In-person in Lexington, Kentucky, or online anywhere
Running coaching questions
What to know before we build your plan.
Clear guidance from Greg Barber, an ACE-certified personal trainer and running coach in Lexington, Kentucky.
What race distances do you coach?
GTB Performance provides personalized coaching for 5K, 10K, half-marathon, and marathon runners. Your training is built around your current fitness, race date, schedule, and experience.
Can you help me train for my first marathon?
Yes. First-time marathon runners receive a progressive plan that coordinates weekly mileage, long runs, pacing, strength, mobility, fueling practice, recovery, and race-day preparation.
Do you offer running coaching in Lexington, Kentucky?
Yes. GTB Performance provides running coaching in Lexington, Kentucky, as well as online coaching for clients throughout the United States.
How does online running coaching work?
You receive personalized running, strength, mobility, and nutrition guidance with regular accountability and weekly adjustments. Your plan changes as your fitness, schedule, and needs change.
What is included in marathon and half-marathon coaching?
Coaching includes personalized running workouts, runner-specific strength and mobility, fueling guidance, accountability, and weekly adjustments based on your training, recovery, schedule, and feedback.
Do I need to be fast or experienced?
No. Coaching is built for your starting point, whether you are preparing for your first race, returning after time away, or trying to improve a previous performance.
Your next finish line
Ready to stop guessing your way through race prep?
Tell me about your race, current training, and biggest challenge. I’ll review your application and recommend the best next step.
COACHING APPLICATION
Take the first step.
Complete the short application so I can learn where you are now and where you want to go.
Apply for coaching No pressure. Your answers help us see if coaching is a good fit.