With the increasing popularity of extreme conditioning programmes, athletes and patients are searching for new, engaging, high-intensity, total-body workouts. The sport of Hooverball is increasingly used as a workout. First devised in the USA in 1929 to keep President Hoover physically fit, Hooverball has experienced increasing popularity in the past 15 years. The game is scored like tennis and played like volleyball, with players throwing and catching a heavy medicine ball over a volleyball net. Players use complex, multi-joint, explosive movements, featuring torsion, flexion and extension to absorb the forces involved. This paper reports a case of a Hooverball player who presented with a knee injury. The paper also reviews the origins of the sport, and its increase in popularity related to the increasing prominence of extreme conditioning programmes. A literature review, and common Hooverball-related injuries, are presented. Clinical recommendations are set out for patient safety, injury prevention and game coverage, including a prehabilitation strategy for players prior to engaging in this revived and growing sport.