Doug Guthrie

MY BIO:

Focused training to unlock your full potential.
As a coach, my mission is to empower athletes at every level to realize their full potential by drawing on the lessons and experiences I’ve gained over the years. Success comes not just from the training plan itself—but from the strong, communicative partnership between coach and athlete. I believe that regular feedback and honest dialogue transform a standard plan into a tailored strategy that fits the athlete’s goals, experience, and lifestyle. When communication is open, implementation becomes seamless, and the athlete’s path forward is clear.

With over two decades of experience in endurance sports, I’ve developed deep expertise across all facets of athletic training—from nutrition and strength conditioning to race strategy, equipment, and scheduling. My coaching philosophy is rooted in both study and mentorship, shaped by real-world experience and a passion for helping athletes grow.

My approach to balancing training with all the aspects of day-to-day life will take the guesswork out of the process

I hold certifications from USAT Level 1, Ironman University, TrainingPeaks Level 2, 80/20 Certified Coach and US Masters, equipping me with the knowledge to guide athletes of all levels. As head coach of a YMCA program with over 50 members for five years, I supported athletes training for everything from 5Ks to Ironman triathlons.

Now through Gu3 Training, I work with athletes across the United States, creating customized programs for triathlon and running. I’ve helped dozens achieve their first finish lines—and others reach elite milestones, including IM 70.3 World Championship and Kona qualifications.

I spent five years as the head coach of the YMCA endurance program, guiding over 50 athletes of all levels—from 5Ks to Ironman. Through Gu3 Training, I now support athletes across the world, helping first-timers achieve finish lines and seasoned competitors qualify for world championships.

My coaching philosophy is simple but powerful: meet athletes where they are, simplify the path forward, and build a personal partnership rooted in communication, trust, and tailored training. I lead by example—constantly learning, growing, and inspiring others to do the same.

Over the past 20+ years, I have raced extensively at nearly every level, completing:
29 Ironman-distance races
9 Ironman World Championship finishes, with a personal best of 9:32 at Ironman Texas 2015—posting the fastest run split (3:20) in his age group
Multiple Boston Marathon qualifications
Numerous 70.3 events

Additional career highlights include:
Ultraman Florida Finisher (2023)
2nd Place – Ironman Chattanooga (2023)
Course Record – IM Chattanooga 55–59 AG run split (3:36)
Guiding Adrienne Bunn to a World Record finish at the 2023 and 2025 Ironman World Championship (12:41, PCID Division)
2nd Overall – Great Floridian Triathlon (2014, 2015), with a record-setting performance in 2015 just two weeks after racing Kona
Florida State Masters Champion – Space Coast Marathon (2019, 3:10)
USA Triathlon National & Masters Champion – Great Floridian Triathlon (2020)