A total of 1,702 people aged between 51 and 75 and with stable gait were followed between 2008 and 2020 for the study. At the start, participants were asked to stand on one leg for 10 seconds without any additional support. To standardise the test, participants were asked to place the front of their free foot on the back of the opposite lower leg while keeping their arms by their sides and their gaze fixed straight ahead. Up to three attempts on either foot were allowed.