![]() ![]() ![]() Accordingly, simple field tests that require minimal resources to be performed and equations for the prediction of V˙O 2max are essential for the inclusion of CRF evaluation in different clinical settings. Tables of normalcy and specific V˙O 2max prediction equations could facilitate the use of CRF assessment as a routine test for screening cardiovascular risk in clinical practice. In addition, this test is more representative of activities of daily living than other walking tests. 4–6 This characteristic makes the 6MWT a simple and less costly CRF assessment tool. The 6MWT has been validated in several populations, including asymptomatic individuals, 3 and a 6MWT distance has been proven to adequately predict the V˙ O 2max obtained in the laboratory. Among the most appropriate field tests for individuals at higher cardiovascular risk and controlled chronic diseases is the six-minute walk test (6MWT). 2įield tests are performed when neither sophisticated equipment for direct assessment of V˙O 2max nor human resources with a high level of training are available. 1,2 Despite consistent evidence on its relevance, the CRF evaluation has not yet been incorporated as a routine test for cardiovascular risk assessment in clinical practice. In low-resource environments, submaximal and field exercise tests or even CRF estimates should be implemented. 1,2 The gold standard for CRF expression is the maximum oxygen uptake (V˙O 2max) obtained at the end of a cardiorespiratory exercise testing (CPET). It has been recommended that cardiorespiratory fitness (CRF) should be considered as a vital sign in cardiovascular health assessment. It could be useful in clinical practice for screening and monitoring the cardiorespiratory risk in adults. The CRF classification by the 6MWT distance is valid in comparison with V˙O 2max, especially for identifying adults with low CRF. It was not possible to differentiate between participants with regular and good CRF. Moreover, the 6MWT distance (%pred.) showed excellent ability to identify very low CRF (6MWT distance ≤ 96% AUC = 0.819) and good ability to differentiate CRF as low (6MWT distance = 97%–103% AUC = 0.735), excellent (6MWT distance = 107%–109% AUC = 0.715), or superior (6MWT distance > 109% AUC = 0.790). We formulated age- and sex-related classification tables for CRF using the 6MWT distance. The 6MWT distance declined by 9.3% per decade in women and 9.5% in men. V˙O 2max declined by 8.7% per decade in both men and women. We investigated the 6MWT distance cut-off (%pred.) with the highest sensitivity and specificity for identifying each V˙O 2max classification. Age- and sex-related CRF was classified based on the percentiles as very low (95th percentile) for both V˙O 2max and 6MWT distance. We evaluated V˙O 2max and 6MWT distance in 1295 asymptomatic participants aged 18–80 years (60% women). We aimed to develop a CRF classification using the 6MWT distance in asymptomatic adults considering the treadmill maximum oxygen uptake (V˙O 2max) as the gold standard method. ![]() The six-minute walk test (6MWT) distance could facilitate the assessment of cardiorespiratory fitness (CRF) in clinical practice as recommended. ![]()
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