Table 3: Summary of studies classified as moderate quality, aimed at validating SR-20m test for estimating cardiorespiratory fitness in children and adolescents.

♂ = boys; ♀ = girls; CRF: cardiorespiratory fitness; Mean Dif.: mean differences; MS and PR: Measured and Predicted; VO₂max: maximum oxygen consumption; VO₂ peak: peak oxygen consumption; CRF: cardiorespiratory fitness; SEE: standard error of estimate; %E: percentage of subjects who were within the measurement error; SR-20m: shuttle run test of 20 meters; PACER: Progressive Aerobic Cardiovascular Endurance Run; SR-20m (AD): shuttle run test of 20 meters adapted.