Measuring the Fitness of Football Referees: A New Yo-Yo Test Equation
Football referees need to keep up with the fast-paced game to enforce rules fairly. A key part of their job is staying fit, especially during matches and the whole season. The Yo-Yo Intermittent Recovery Test-Level 1 (Yo-Yo-1) is commonly used to estimate how much oxygen athletes can use maximally (