Comparison of the 6-minute walk distance measured on a 30-metre track with guidance of a health care professional and those measured with a Mobile application outdoors by participants themselves - a validation study.

To improve the practical application of measuring exercise capacity, the purpose of this study was to compare 6-minute walk distance (6MWD) obtained at a 30-metre track with guidance of health care professionals versus 6MWD obtained by participants themselves using an app. In total, 37 participants performed both tests. The mean of the differences between 6MWD on the tests was -4m ± 45m (95% limits of agreement: 84m to -99m). The overall agreement between the two 6MWD measures was 97% with an ICC of 0.96 (95% CI 0.91-0.98, p < 0.001). Use of an app is feasible, reliable and valid to assess 6MWD.