Beep Test VO2 Max Chart: Understanding the Measurement
The beep test, also known as the multistage shuttle run test, is a widely used exercise protocol to measure an individual's maximal oxygen uptake (VO2max). This chart explains how the VO2 max value is estimated during and after the test.
Upon termination of the test, four 20-second samples are taken to measure VO2. The O2 recovery curve is then retroextrapolated at time zero of recovery to estimate VO2max. Each individual's test is performed separately, as this allows for a unique regression line to be created.
The beep test involves running back and forth on a 20-meter course while keeping pace with sound signals emitted from a prerecorded tape. The frequency of the sound signals increases by 0.5 km/h every minute, starting at a speed of 8.5 km/h.
By analyzing the relationship between the stage number and the corresponding speed, age, and VO2max value, researchers have developed a prediction formula to estimate VO2max. This formula is: Y = 31.025 + 3.238X - 3.248A + 0.1536AX, where Y represents VO2max (ml/kg/min), X is the speed (km/h) corresponding to the stage number, and A is age (years). The formula has been validated with a high correlation coefficient of 0.71 using data from 188 boys and girls aged 8-19 years.
The beep test is a reliable and efficient way to measure VO2max in various populations, including schoolchildren, healthy adults attending fitness classes, and athletes participating in sports that involve frequent stops and starts, such as soccer or basketball.