This was a team project within my PhD education. We had two biomedical engineers, one exercise physiologist, and me as the biomechanist and physical therapist.

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By using the MatLab phone app we had to create a phone system to measure knee angle and use it for a small research study.

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By using the phone sensors and synchronizing both phones together we created the simple app and compared the knee angle between front-squat and back-squat in a small sample of males and females.

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On the left graphs, we compared the maximum knee angle provided by the app compared to my manual assessment of the knee angle using a goniometer.

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On the right graph, I show a representation of the whole squat angles of all the participants during the front and the back squat.

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The image on the bottom shows an example of a participant wearing the two phones in running straps and me measuring the peak knee flexion with a goniometer.