Dr. Charlie Seltzer Lifestyle Medicine Team

Sgt. nate griffin

personal trainer

Sergeant Nate Griffin, affectionately known as “Sarge,” is a proud U.S. Army Veteran and former Army Medic with over 17 years of military service and more than 20 years of experience in healthcare and personal training.

Nate brings a unique combination of medical knowledge, fitness expertise, and a genuine passion for helping others improve their health and quality of life. He specializes in strength training, corrective exercise, injury rehabilitation, mobility, and functional fitness, with a particular focus on orthopedic concerns and helping clients move safely and confidently.

His experience also includes weight management, pre- and postnatal fitness, older adult training, basic self-defense, and T’ai Chi Chuan. He holds certifications through the American Red Cross, AFAA, ISSA, and MTS.

Whether you’re looking to build strength, regain mobility, manage a health concern, or simply feel better in your everyday life, Sarge brings patience, encouragement, and years of hands-on experience to help you reach your goals.