Cite
MLA Citation
Justin J Lang et al.. “International variability in 20 m shuttle run performance in children and youth: who are the fittest from a 50-country comparison? A systematic literature review with pooling of aggregate results.” British journal of sports medicine, vol. 52, no. 4, 2018, p. 276. http://access.bl.uk/ark:/81055/vdc_100135554336.0x000020