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Sensor and Hardware

  • How many sensors do I need for IMU Step?

    We highly recommend 2 sensors to gain a better understanding of the load on each limb and associated asymmetry...

  • Why do the sensors measure at such high frequency?

    Research shows that to precisely identify & characterize human step impacts you need to be able to measure each step at over 400Hz. To account for other possible movements throughout the human range o...

  • What are the recommended specifications to run IMU Step?

    The below specs and devices are recommended for an optimal experience when running IMU Step: iOS - an iOS device running iOS 9 or later must be used to capture session data. Android OS devices are cur...

  • Where do you put the sensors on the body?

    The lower medial side of the tibia, just above the malleolus (i.e. just above the ankle bone on the inner side of the leg). This location is the best surrogate measure of tibial shock. Tibial shock is...

  • Can I control my sensors from my computer?

    While running a session, sensors are only able to be tracked via the iOS app, not a computer. When you plug your sensors into the computer you are able to download, preview, charge, and clear data fro...

  • How do I reset the sensors?

    If the sensor is not functioning properly or is stuck recording, a sensor reset may resolve the issue. To reset the sensor: oClose Step desktop  oWith sensors plugged in, hold the adapter button for 1...

  • How to download one sensor at a time

    The sensors and software in IMU-Step are designed to be uploaded in pairs. If your computer only has one USB port we recommend using a USB-hub to download two sensors at once. The link below has our r...

  • What sizes do the straps come in?

    IMeasureU offers 4 sizes of straps, listed below. Medium straps are the default size we provide unless other sizes are requested. Strap Size S M L XL Ankle Size (Inches) 7.7-8.9 9.1-10.4 10.6-12.0 12....

  • Why won't my sensor charge?

    If you have a sensor that will not charge when it's plugged in, there are a few things to check. First, try plugging the sensors into different computers and USB ports, with multiple USB cords and cha...

  • Why won't my firmware update?

    In some cases, the firmware update returns an error. If this happens, you may have to reset your sensors again before trying, the instructions for that are:oClose Step desktop  oWith sensors plugged i...