"Body by Science" by John Little is a comprehensive guide to achieving optimal health and fitness through brief, intense workouts based on scientific principles. With a focus on maximizing the body's adaptive response, the book advocates for a specific style of training called the Big 5 workout. This regimen consists of five compound exercises performed intensely and slowly for no more than 12 minutes. By minimizing time spent at the gym and emphasizing quality over quantity, "Body by Science" promises to deliver dramatic improvements in strength, endurance, and overall fitness. The book also delves into the science behind muscle growth, hormonal responses, and the benefits of high-intensity training. With its evidence-based approach and practical tips, "Body by Science" offers a time-efficient and scientifically proven method for transforming your body and improving your health.