Grant R. Tomkinson|Justin J. Lang|Mark S. Tremblay|Michael J. Dale|Allana G. LeBlanc|Kevin Belanger|Francisco B. Ortega|L Léger
International normative 20 m shuttle run values from 1 142 026 children and youth representing 50 countries
University of North Dakota|Children's Hospital of Eastern Ontario|Children's Hospital of Eastern Ontario|University of South Australia|Children's Hospital of Eastern Ontario|Karolinska Institutet|Universidad de Granada|Université de Montréal
develop sexspecific agespecific international norms 20 shuttle run test 20msrt children youth aged 917 years estimate prevalence meeting fitnessgram criterionreferenced standards healthy cardiorespiratory endurance crea systematic review undertaken identify papers explicitly reporting descriptive 20msrt 1 min stages data children youth since 1981 data included apparently healthy free known diseaseinjury 917 years old following standardisation common metric protocol differences pseudo data generated using monte carlo simulation populationweighted sexspecific agespecific normative centiles generated using lambda mu sigma lms method sexrelated agerelated differences expressed per cent standardised differences means prevalence healthy cre estimated using sexspecific agespecific fitnessgram criterionreferenced standards formula see textnorms displayed tabulated centiles smoothed centile curves 20msrt using 4 common metrics speed last completed stage completed stagesminutes laps relative formula see text final data set included 1 142 026 children youth 50 countries extracted 177 studies boys consistently outperformed girls age group mean difference95 ci 086028 kmh 079020 standardised units magnitude agerelated increase larger boys girls higher proportion boys mean95 ci 6714 healthy cre girls mean95 ci 5417 prevalence healthy cre decreasing systematically agethis study provides comprehensive uptodate set international sexspecific agespecific 20msrt norms children youth utility health fitness screening profiling monitoring surveillance