Many scientists who use the present gait analysis systems may not realize the error associated with the methods . Gait analysis, however, may be useful for research or comparison purposes. The answer is yes, under certain conditions. The most important condition is having a video to be able to observe the actual movement and relate it to the results. Without video, there is no method to evaluate your findings, no technique for overlapping the results with the original data.
Video provides the ability to compare calculated results with the original performance.
Kinematic analysis based on mathematical calculations of unseen joint centers should be viewed with some level of skepticism when compared to scientific principles and standards. The utilization of Gait Analysis as a biomechanical exercise or to test a hypothesis is an application which reflects acceptable scientific standards. The Markers Sets that are used in the industry are not very accurate. Check here just to see the comparison of the existing Markers Sets. The answer, though complex, can be explained in surprisingly simple terms.