Smart Biofeedback

  • Biofeedback Intro
  • Video Feedback
  • Top Athletes
  • Biofeedback Talk

What is OptoGait


OptoGait is a system for optical detection made by a transmitting and a receiving bar. Each one contains 96 LEDs communicating on an infrared (visible) frequency with the same number of LEDs on the opposite bar. Once positioned on the floor or on the treadmill, the system detects the interruptions of the communication between the bars - caused by the patient’s movement - and calculates the duration and position. During the execution of a running, gait or series of jumps test, the contact and flight times can be measured with an accuracy of 1 thousandth of a second and the position of the interrupted LEDs with a space resolution of 1,041 cm. Starting from this basic data, the dedicated software measures in real-time a series of crucial data for the movement analysis. The absence of mechanical moving parts ensures a long life, accuracy and repetition possibilities.

  Quantity and Quality Assessment

  OptoGait acquires numerical parameters in real-time for gait, running and jump tests that can be viewed immediately. The easy to read report contains all data, and asymmetries between the two legs are highlighted instantly. OptoGait does not only detect the numerical data, but, via small cameras, which can be freely positioned, it allows the user to acquire images of carried out tests, synchronizing them perfectly with detected events. Without the need for any further synchronization between hardware and cameras, the numerous benefits of cross verification of data and images can be fully used. A more detailed video analysis can be had by further utilizing the dedicated utility (angle, distance calculus, graphic tools, etc.).



The main idea of this new feature is to show the patient directly some main parameters of the test he/she is carrying out. This allows to request real-time 'corrections' of some trial anomalies, making the test become an exercise, not only a diagnosis. Particular attention is paid to the concept of asymmetry, i.e. the difference between right and left foot (expressed in %) with respect to a particular parameter.

A classic example is a treadmill gait test, where the patient has a monitor in front of him/her (better if a large-screen TV), where the operator can choose which parameter among those available to display, depending on the pathology or rehabilitation.

During the gait test, the patient receives a numerical/graphical feedback (in the form of green/orange/red colors and up/down arrow symbols) indicating what is not 'working' and how to correct it (e.g. making the left gait longer or increasing the rhythm, etc.

The new feature (presently available only for Sprint and Gait Tests; Treadmill Gait, Treadmill Run, and Tapping) is found in Test Module > Execute > Configure, with the two parameters 'Output second monitor' and 'Save Test Data.'

ss14 EN

When the 'Output Second Monitor' option is selected, a window is created on the second monitor (or on the same monitor, when the second one is not physically present), where the displaying of one test parameter asymmetry can be configured (e.g. the step length for a gait test) both as a numerical value and as a graphical bar display.

Instead the 'Save Test Data' parameter is used (if set on No) when, as previously described, the patient must 'exercise' and it is not necessary to save the test at the end of the trial. In this case no data 'sampling' and, most of all, no webcam video sampling is carried out, thus reducing the used disk space (temporary video files and memory swap files) as well as CPU use.

The parameter to be displayed is configured in the second window on a side panel bar, which can be minimized (<< key).

ss5 en

The parameters, which can be set, are the following:

                • Type: the parameter to be displayed (changes depending on the test type carried out; e.g. for a tapping test, the flight and contact times, rhythm, etc., for run tests, speed, acceleration, etc., whereas for gait tests, regular gait analysis parameters, such as stance, swing, single support, step length, etc.).
                • Data Window: the amount of data used for calculating the asymmetry (the last N are used); the higher the data, the better the 'average' and the more real the value, but it will be more difficult for the patient to try and correct his/her asymmetry.
                • Warning Threshold: if the asymmetry is lower than this percentage, the value is displayed on a green background, and if it is higher, the background color is orange
                • Bad Threshold: if the asymmetry is lower than this percentage, the value is displayed on an orange background, and if it is higher, the background color is red. Setting for example the warning threshold at 5% and the bad threshold at 10% the following background colors will be used:

0 <= value< 5 -> green

5 <= value<10 -> orange

>= 10 -> red

                  • Trend: if the asymmetry value exceeds the warning threshold, an indication for the patient is displayed with an arrow on the value bar. The indication can be to increase the lower value or to decrease the higher value.

ss17 EN


  Watch how Top Star Athletes use OptoJump Next and/or OptoGait:

Justine Dufour-Lapointe, 2014 Sochi Olympic Gold Medal in the moguls (freestyle ski) event    Andrew McCutchen (2013 Baseball National League Most Valuable Player)
Damian Lillard & Portland Trail Blazers (Basket, NBA)   Sara Errani & Roberta Vinci (Tennis, World #1 in doubles in the WTA Tour Rankings)
Ted Ligety (Alpine ski, Olympic gold & four-time World Cup champion)   AS Roma (Soccer, Italian SerieA Top Team)
LoLo Jones (60m and 100m hurdles, 3 NCAA titles)   Mo Farah and Galen Rupp (5k & 10k; Gold & Silver medals in 2012 London Olympics)
Chad Jones (American Football, NY Giants)   Renaud Lavillenie (Pole Vault, London 2012 Olympic Champion)
Dayron Robles (110m hurdles, Olympic Champion) and Jackson Quiñónez (Spanish national champion)   Christophe Lemaitre(100m and 200m, Europe Champion)
Teddy Tamgho (Triple Jump, World Indoor Champion)   Yohann Diniz (50km walk, Europe Champion)
U.S. National Ski Team (Alpine Ski)   China National Teams of Rugby, Basket, femal soccer, fence

Gordon Uehling & Dr. Peter Gorman presentation about Balance Control And Split Step.

How to develop and maintain world class balance control and a properly well timed and executed split step.