He has long been an avid fitness enthusiast and became a martial arts practitioner in recent years. He has been weight lifting for 12 years and practicing martial arts for three. Nathan is a Certified Personal Trainer (CPT)/Certified Fitness Trainer (CFT) with the International Sports Sciences Association (ISSA). He is a Certified Fitness Kickboxing Instructor through the Kickboxing Fitness Institute. Nathan is currently pursuing Sport Nutrition Certification through ISSA. Nathan had the opportunity to meet and learn from a USAPL state ranked power lifter, two NPC bodybuilding competitors, and other local, amateur, and competitive athletes. He is the owner/operator of Nathan DeMetz Personal Training.