In this episode of Strength Coach Rants, we explore the dark history of Unit 731, the notorious Japanese military unit that conducted inhumane experiments during World War II, including those on children. These horrifying events left an indelible mark on scientific and cultural perceptions of physical development in youth. We connect the historical context to modern debates about weight training for children, dissecting common myths and misconceptions. Why is youth strength training still so misunderstood? How can we ensure that science and ethics guide our practices today? Join me as we unravel the lessons from history and how they shape the world of strength and conditioning for young athletes.