Exercise Science Commons^™

Validity And Reliability Of A Computer Vision System To Determine Bar Displacement And Velocity, Christopher Taber, Emma Patterson, Jui Shah, Padraig Francis, Justin C. Wager

Exercise Science Faculty Publications

This study examined the validity and reliability of a video-based smartphone application (VBA) to measure displacement and velocity in the barbell bench press, back squat, and deadlift. Nine resistance-trained subjects (three females; six males; age: 24.2±4.2 years; height 175.8±8.1 cm; body mass 87.2±18.2kg) completed two test-retest sessions for the barbell bench press, back squat, and deadlift one week apart. Eight repetitions were completed for the bench press, back squat, and deadlift with a load of 40kg and completed at fast and slow velocities. Bar displacement and average velocity were measured simultaneously using 3-D motion capture (MC) and a VBA. The …