A Cross-Sectional Study on Fall Direction and Lower Limb Loading in Response to a Perturbation on Laterally Inclined Platform

Figure 3

Measurement of step width using Kinovea software. (a) The grid in Kinovea software is calibrated to ensure accurate measurements. (b) Step width (SW) measurement: Real Kinovea data are collected, as illustrated in the SW3 of diagram (c). The measured step width is 1.64 cm, which is calculated by subtracting the resultant 12.86 cm from the initial 14.5 cm since the right leg has crossed the midline. Reference distance test: A reference distance test is performed in the background, where a 16.89 cm Kinovea measured distance is validated between stickers placed within a grid section that measures physically 17 cm. (c) SW1 case: SW1 represents a case where the right leg did not cross the midline and is positioned 14.5 cm away from the midline. Therefore, SW1 is 29 cm. SW2 case: SW2 represents a case where the step width is on the midline, resulting in a step width (SW2) of 14.5 cm.

(a)

(b)

(c)