In Motion

MotionMetrix Reports: Gait Characteristics

Posted by Oliver Watson

Dec 13, 2016 12:16:38 PM

In this post we will cover the Gait Reports generated automatically by the MotionMetrix system.  In a previous post, we covered the Running Economy section of the MotionMetrix reports - if you missed it, you can find that post here.  The Gait Characteristics report is included as the second page of all MotionMetrix reports, and covers a range of different variables that are important for identifying deficiencies in running form.  

Gait Characteristics at a Glance

Gait Report
The Gait Characteristics report page contains different information compared to the Running Economy page.  Rather than a list of ratings, this page provides averaged joint measurements as well as different classifications for runners' gait.  

Displacement of the Center of Mass

The Displacement of the Center of Mass graph, shown in milimeters, provides a measurement of how a runner's Center of Mass moves on average.  It provides the measurement in terms of antero-posterior (front and back), medio-lateral (side to side) and vertical (up and down) displacement during the gait cycle.  

Hip and Knee Angles

 The Hip and Knee Angle graphs, shown on the right side of the screen and measured in degrees, provide an overview of the runner's hip/knee flexion and extension in thesagittal plane.  The graph is broken down between left and right, and is staggered.  

Step Separation

Step separation is measured relative to the Center of Mass and is calibrated against the results from 600 mixed-level runners at 12 km/h.  The classification is determined to be either neutral, wide, or narrow.  Step separation can have a large impact on the magnitude of frontal plane moments on the lower limb joints.  

Knee Alignment During Support

Knee Alignment during the support phase is measured from the frontal perspective.  The runner's range of motion is compared against the results of 600 mixed-level runners.  There are three potential ratings for knee alignment: neutral, varus/bowlegged, and valgus/knock-knee.  Excessive varus alignment can yield increased frontal knee moments, which can result in various knee problems.

Gait Parameters Table

The gait parameters table shows a selection of important angles of the lower limbs.  Each angle is shown as an average, with the corresponding left and right angles shown in parentheses.  There is also a reference list of the averages taken from elite runners, as well as a comparison of the runner's values to the values of said elite runners. Basically, the closer a runner's measurements are to those of the elite runners, the better (typically).  

MotionMetrix at a Glance

Running Analysis System

The MotionMetrix system is the world first fully automatic 3D running analysis solution.  Through the use of Markerless Motion Capture technology and proprietary algorithms, MotionMetrix is able to accurately dissect runners' stride, gait, and loading characteristics in a mere fraction of the time it took with traditional video or optical motion capture systems.  

3D Gait Analysis Treadmill

The development team at MotionMetrix are working tirelessly everyday to make improvements and add functionality to the system.  Stay tuned for future updates; there will be much, much more to come.  For more information on the most innovative automatic running analysis solution available, please get in touch with us below!

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The zFlo blog is maintained by our team in hopes of providing some insight into the motion-analysis industry. We work with a large number of companies and have over 10 years of experience working with video and optical motion capture technology - this is where we do our best to explain some of the more important aspects of how this technology can be used.