title: Aerobic fitness testing in 6- to 9-year-old children: reliability and validity of a modified Yo-Yo IR1 test and the Andersen test.
abstract: This study analysed the reliability and validity of two intermittent running tests (the Yo-Yo IR1 test and the Andersen test) as tools for estimating VO(2max) in children under the age of 10. Two groups, aged 6-7 years (grade 0, n = 18) and 8-9 years (grade 2, n = 16), carried out two repetitions of a modified Yo-Yo IR1 test (2 × 16 m) and the Andersen test, as well as an incremental treadmill test, to directly determine the VO(2max). No significant differences were observed in test-retest performance of the Yo-Yo IR1 test [693 ± 418 (±SD) and 670 ± 328 m, r (2) = 0.79, CV = 19%, p > 0.05, n = 32) and the Andersen test (988 ± 77 and 989 ± 87 m, r (2) = 0.86, CV = 3%, p > 0.05, n = 31). The Yo-Yo IR1 (r (2) = 0.47, n = 31, p < 0.002) and Andersen test performance (r (2) = 0.53, n = 32, p < 0.001) correlated with the VO(2max). Yo-Yo IR1 performance correlated with Andersen test performance (r (2) = 0.74, n = 32, p < 0.0001). In conclusion, the Yo-Yo IR1 and the Andersen tests are reproducible and can be used as an indicator of aerobic fitness for 6- to 9-year-old children.
authors.affiliation: Department of Physiotherapy, University College Lillebaelt, Blangstedgårdsvej 4, 5220 Odense SØ, Denmark. thah@ucl.dk
authors.forename: T
authors.initials: T
authors.lastname: Ahler
authors.forename: M
authors.initials: M
authors.lastname: Bendiksen
authors.forename: P
authors.initials: P
authors.lastname: Krustrup
authors.forename: N
authors.initials: N
authors.lastname: Wedderkopp
mesh_terms: D000367:Age Factors; D000465:Algorithms; D054874:Athletic Performance / Q000502:physiology; D002648:Child; D015444:Exercise / Q000502:physiology; D005080:Exercise Test / Q000379:methods* / Q000592:standards; D005260:Female; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology; D010809:Physical Fitness / Q000502:physiology*; D015203:Reproducibility of Results; D012420:Running / Q000502:physiology