Legion of Strength STL is a fitness training business in St. Charles, Missouri, founded by Johnny, an Exercise Science graduate and Certified Strength and Conditioning Specialist. The business offers a range of fitness classes and programs, including boot camp-style strength training and athleticism-focused training, and works with clients of varying ages, sports backgrounds, and group sizes. Its training approach emphasizes strong academic foundations, creativity, innovation, and engaging coaching tailored to individual fitness and performance goals.