The Influence Of Sex And Body Size On The Validity Of The Microsoft Kinect For Measuring Knee Motion During Landing
Abstract
Measuring knee motion during landing is a method to evaluate knee injury risk. Three-dimensional (3D) motion capture is inaccessible, and the Microsoft Kinect is an alternative to measure knee motion. The primary objective was to evaluate the influence of sex and body size on the validity of the Kinect to measure knee motion during landing. A secondary objective was to compare knee motion between females and males with high and low body mass index (BMI). We assessed frontal plane knee kinematics of 40 (10 per group of females and males with high and low BMI) participants during landing with the Kinect and 3D motion capture. Good agreement between methods was found for the knee ankle separation ratio across groups, but there was low agreement between methods for measuring knee abduction. The high BMI group regardless of sex had more knee abduction than the low BMI group when measured with motion capture.