Gait Up is a member of the Keep Control network, a European project focusing on Gait and balance deficits for the elderly that started in November 2017.
One of the goals of this project is to develop tools and algorithms based on optimal sensors configuration to compare gait and balance parameters in clinical and home assessments. One of the well known mobility functional test performed in the clinic is the “5 time sit-to-stand” test that evaluates the balance and muscle power of the patients.Traditionally, the only outcome measured is the total time that it takes for a patient to perform these 5 repetitions.
By using the Physilog® sensors, it is possible to extract parameters such as the power, the maximum angular velocity, and the flexion/extension angle of trunk to characterize the balance performance of the patient more deeply.
The algorithm is being validated against an optical motion tracking system at the Laboratory of Movement Analysis and Measurement (LMAM) at EPFL to maximise the accuracy of the test.
The preliminary results on several young healthy subjects show the feasibility of the algorithm in detecting all the postural transitions during the 5xSTS tests with an error of approximately 200 milliseconds in the duration of the subphases of the test, 1.5 degrees in the tilt angle of the trunk, and 2.5 cms in the vertical displacement of the body center of mass.