"Bizeps, Trizeps & Co." is a German science documentary exploring how human muscles work — from basic anatomy to the biology of strength, endurance, and movement. The film follows researchers, doctors, and athletes to show what actually happens inside a muscle during exercise, how training reshapes the body, and why the same principles apply whether someone is a competitive athlete, a rehabilitation patient, or simply trying to stay healthy. With accessible explanations and clear visualisations, the documentary translates sports science and physiology for a broad audience. Part of the Kantara Films & Documentaries archive, it sits alongside the production company's other work on health, biology, and the human body, and is aimed at viewers interested in fitness, medicine, and the science behind physical performance.