What does the Yo-Yo test measure?

The Yo-Yo test measures aerobic fitness, specifically assessing an individual's ability to perform prolonged, intense exercise while maintaining a certain level of performance. This test involves repeated short bursts of running interspersed with periods of active recovery, which simulates the physical demands of sports that require intermittent high-intensity effort.

By evaluating how well an individual can recover from brief efforts and sustain their performance over time, the Yo-Yo test provides a clear indication of cardiovascular endurance and aerobic capacity. This is particularly significant in sports that require endurance, such as soccer or rugby, where players often need to recover quickly between sprints or high-intensity plays.

The other options focus on different aspects of physical fitness. Muscle strength assesses the maximum force that can be generated, flexibility measures the range of motion around a joint, and body composition evaluates the proportion of fat and non-fat mass in the body. While these are all important components of physical fitness, they are not what the Yo-Yo test specifically targets.