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Reliability and convergent validity of the 6-min run test in young adults with Down syndrome
Carlos Ayán-Pérez1, R Iván Martínez-Lemos1, José M Cancela-Carral1
1University of Vigo, Department of Special Didactics, Faculty of Education and Sports Science, Campus A Xunqueira s/n, 36005, Pontevedra, Spain.
Background:
There is limited evidence about the psychometric properties of field tests to measure cardiorespiratory fitness in people with Down syndrome.
Objective:
This study aimed at analyzing the reliability and convergent validity of the 6-min run test when performed by young adults with Down syndrome (DS).
Methods:
In a cross-sectional design fifty-one young adults with DS (mean age 26.20 ± 7.14 years; 54% women) performed the 6-min run test and the 16-min shuttle run test twice with a one week-interval between test and retest.
Results:
The 6-min run test offered high reliability for the distances covered (ICC: 0.974; 95% CI: 0.955-0.985) and good reliability when comparing peak heart rate values obtained in the test and retest (ICC: 0.870; 95% CI: 0.772-0.926). A significant correlation between the 6-min run test and the 16-min shuttle run test was observed for the test (r = 0.705; Sig = 0.001), and retest phases (r = 0.651; Sig = 0.001). The relationship between the estimated maximal oxygen consumption (VO2 max) peak after the performance of the 16-min shuttle run test and the distance covered by the 6-min run test was statistically significant (r > 0.7). No significant differences were found between the equations that estimate VO2 peak for both tests.
Conclusions:
These findings suggest that the 6-min run test shows high test/retest reliability and moderate to moderately high convergent validity when performed by adults with DS.
