Athlean-X is a fitness brand founded by Jeff Cavaliere, a physical therapist and strength coach. It offers a variety of workout programs, nutrition guides, and fitness resources aimed at helping individuals achieve their fitness goals. The brand emphasizes science-based training methods and injury prevention. The Athlean-X programs cater to different fitness levels and include strength training, muscle building, and fat loss strategies. Users can access online videos, workout plans, and community support to enhance their fitness journey. The brand is well-known for its focus on functional training and athletic performance.