Comparison of inertial sensor data from the wrist and mid-lower back during a 2-minute walk test

Triaxial inertial sensor data was measured at the wrist and mid-lower back location during a 2-minute walk test. A Microsoft Band 2 was used to acquire gait data at the wrist and a Samsung Galaxy S5 smartphone was placed at the posterior pelvis. Accelerometer and gyroscope signals did not correlate well between the two locations. Important gait parameters at the wrist may lead to a better understanding of human locomotion profile due to periodic trends observed in wrist data. Turn detection accuracy was 86.0±23.1% and 78.3±20.2% for the MSB2 and smartphone, respectively. Turn detection showed that the smartphone y-axis gyroscope had more distinct peaks. Turn peak analysis showed that normalized peak heights were in agreement and MSB2 had a longer turn time.