Weblooking for a career in the fitness industry? This article explores various fitness job ideas, from personal training to group fitness instruction, to help you find. High school diploma and certification through an accredited program. Web25 careers in fitness. Whether they're clinical or nonclinical, all fitness careers share a common trait: They involve the improvement or restoration of physical. Webfitness careers can be extremely attractive and rewarding for former or current athletes, exercise buffs, and individuals who like to help others get healthy.