Sensor Shorts version 1
Reducing hamstring injuries in football and field hockey
In this version of the sensor shorts we integrate five acceleration sensors (MPU-9250 IMUs, InvenSense Inc.) in a stretchable legging. The sensors are much smaller and lighter than the Shimmer IMU sensors used for the version 0 and are therefore expected to be more comfortable and result in less spurious signals due to the inertia of the sensors itself.
Results and conclusions
In order to test the accuracy of the new sensor shorts the recorded movements were compared to an Optoelectronic Motion Analysis System (Vicon Nexus), see Fig.4. From this we conclude that our measurement system was able to measure the local knee and hip angle movements as accurate as the Vicon system, which is currently considered as the golden standard for local motion measurements.