'Stronger' is an urgent call for each of us to recognise muscle as 'the vital, inextricable and effective partner of the soul'. It tells a story of breathtaking scope, from the battlefields of the Trojan War in Homer's Iliad, where muscles enter the scene of world literature; to the all-but-forgotten Victorian-era gyms on both sides of the Atlantic, where women build strength and muscle by lifting heavy weights; to a retirement home in Boston, where a young doctor makes the astonishing discovery that frail ninety-year-olds can experience the same relative gains of strength and muscle as thirty-year-olds if they lift weights.