An individual is timed while standing on one leg without holding onto a support, and there is a ceiling of 10 seconds on some of the tests, including the GMFM. For the Single Leg Balance Test, items 57 and 58 from Dimension D of the GMFM were used to establish measurement protocols. Children were asked to stand on their most involved leg without holding onto a support, and the time in seconds was measured on a stopwatch, up to a maximum of 10 seconds.