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Donnie Kiernan, personal trainer, doing a chest press on the incline bench at the Strength
Donnie Kiernan, Owner and trainer at the Strength & Performance Institute, flexing in fron

 Meet Donnie! 

Owner & Head Trainer


Donnie Kiernan is the owner and head personal trainer/strength and conditioning coach of the Strength & Performance Institute in Clearwater, FL. Tampa native, born and raised, and local Clearwater resident. Donnie has had an avid desire to understand the biomechanics of the human body and its ability to build strength from early on in his career. Over the last 20 years, his personal fitness journey has evolved from military physical fitness, Strongman competitions, and eventually into powerlifting. Donnie is deeply dedicated to helping others see and experience what their bodies are capable of when given the right knowledge and guidance. Donnie's relentless drive and interest for new knowledge about how the body functions and performs is what makes him a top-tier strength/personal trainer.

Personal trainer, Donnie Kiernan at the Strength & Performance Institute in Clearwater, FL

Education & Credentials

After high school, Donnie spent eight years in the United States Army serving with the Signals Intelligence Corps and deploying to Iraq. Following his military service, Donnie went on to earn his Bachelor of Applied Science degree from St. Petersburg College, as well as his personal trainer certification. While in school, Donnie served as the president of the Student Veterans Association and was honored with the "Veteran of the Year" and  "Atlas Leadership Award." 

Donnie won the American Powerlifting Federation (APF) national championship in 2016 for his division and is a former national and world record holder in the squat and deadlift.

Donnie - Educaton & Credentials
Donnie Kiernan, personal trainer and owner of the Strength & Performance Institute helping

Training Style

Donnie coaches men and women of every fitness level, at a variety of ages. Whether you are seeking physical aesthetic results or have performance-driven goals, Donnie has the knowledge and expertise to help you achieve your fitness goals. His unique experience makes him an ideal personal strength trainer. Whether you've never stepped foot inside a gym, seeking to lose weight, want to look and feel better about yourself, or you're a seasoned athlete. Donnie is dedicated to helping each client become stronger, more capable versions of themselves. If you're dedicated to creating long-lasting results and desire a personal trainer with respect, attention to detail, accountability, and a wealth of knowledge, Donnie may be the right fit for you. 

Donnie Kiernan and Bella Kiernan posing with their softball uniforms for the Clearwater Me

Outside the Gym

When Donnie isn't educating and training clients you can often find him coaching his daughter's district champion softball team, lifting weights, and more recently, spending time with his wife (Ashley) and kids enjoying the Florida life, on the water!

Donnie Kiernan, Owner and Personal Trainer with the Strength & Performance Institute doing
Weights in a gym. Weight room. Focused view of weight plates.

Let's Get Started

Ready to start your fitness journey with SPI? Have additional questions? We're happy to help! Contact us today to get started or to schedule a consultation with an SPI personal trainer.

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