Ground Contact Time accuracy

The accuracy of the Ground Contact measurements was assessed using a high-speed camera. Male and female runners were recruited for the study. They ranged in age, height, weight, running experience, and running style. The runners were tested across a range of running paces faster than 7:00 minutes per kilometer (11:15 per mile). Compared to the video data, accuracy of the ground contact time measurement was better than 96% for most users. This typically corresponds to an error of less than 10 milliseconds.