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  • Title: The Six-Minute Walk Test for adults with intellectual disability: a study of validity and reliability.
    Author: Nasuti G, Stuart-Hill L, Temple VA.
    Journal: J Intellect Dev Disabil; 2013 Mar; 38(1):31-8. PubMed ID: 23244742.
    Abstract:
    BACKGROUND: The Six-Minute Walk Test (6MWT) has been used with clinical and healthy populations to assess functional capacity and cardiovascular fitness. The aim of this study was to determine the test-retest reliability of a modified-6MWT as well as concurrent validity of walk distance with peak oxygen uptake (VO₂ peak). METHOD: Participants were 13 adults (males = 7) with intellectual disability aged 18-44 years recruited from Special Olympics, and with no medical contraindications to exercise. The 6MWT was modified to include familiarisation, a 1:1 pacer, and encouragement every 15 s. Each participant performed the graded maximal treadmill test and the modified-6MWT twice. RESULTS: Test-retest reliability of the modified-6MWT was ICC = .98, and linear regression revealed that the modified- 6MWT distance was significantly related to VO₂ peak (R = .84, p < .001). CONCLUSIONS: The modified-6MWT is easy to administer and score and shows acceptable validity and excellent reliability for assessing cardiovascular fitness in adults with intellectual disability.
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