The Use of a Cost-Effective High Speed Video Camera to Assess Abnormal Gait Mechanics in an Avid Runner with Lumbosacral Dysfunction

Introduction. The sport of long-distance running continues to grow exponentially, and injury rates, associated with running remain high. Research has shown that abnormal gait mechanics are a potential cause for injury. Traditionally, gait analysis studies of injured runners have used expensive, highly technological equipment that is not readily available or practical to use in most clinics. Purpose. This case report will demonstrate the use of an inexpensive high-speed camera to analyze the gait pattern of an avid runner presenting with lumbosacral dysfunction and referred symptoms into the left lateral thigh. Case Description. The patient is a 46 y/o active female presenting with a 2-year history of left buttocks and thigh pain that after examination was felt to be due to lumbosacral dysfunction. Running Gait Analysis. A Canon PowerShot ELPH 320 HS camera and a Vision Fitness T9700 Series treadmill were used for videotaping and the frame-by-frame analysis was performed using Kinovea. Outcomes. Through the use of this camera, subtle gait deficits were able to be recognized and addressed accordingly and our patient was able to return to running with minimal symptoms. In addition, this paper will discuss how the use of the high-speed camera was successfully implemented into the gait retraining component of our patient's rehabilitation. By providing this visual feedback during the gait retraining period, our patient was able to see how effectively she was incorporating the recommended changes in her running pattern. Discussion. This paper will also discuss the current research on impact peaks and various strike patterns as well as the limitations of the two-dimensional motion analysis systems.