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Updated: May 2, 2026

Home-Based Monitor for Gait and Activity Analysis

Home-Based Monitor for Gait and Activity Analysis

Published on: August 8, 2019

Optimal sensor placement for measuring physical activity with a 3D accelerometer.

Simone T Boerema¹, Lex van Velsen², Leendert Schaake³

¹Telemedicine Group, Roessingh Research and Development, P.O. Box 310, 7500 AH, Enschede, The Netherlands. s.boerema@rrd.nl.

Sensors (Basel, Switzerland)

|February 21, 2014

Summary

Optimal placement of accelerometer-based activity monitors is key for reliable physical activity data. Placing sensors laterally on a snug waist belt improves data quality and reduces variability in research studies.

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Area of Science:

Biomechanics
Wearable Technology
Physical Activity Measurement

Background:

Accelerometer-based activity monitors are widely used for assessing physical activity.
Ensuring the quality and reliability of accelerometer data is crucial for accurate research outcomes.

Purpose of the Study:

To determine the optimal sensor placement for accelerometer-based activity monitors.
To investigate how sensor location and mounting affect the quality of physical activity data.

Main Methods:

A two-staged study involving ten subjects performing various activities (walking at different speeds, deskwork).
Five ProMove2 sensors were worn simultaneously on an elastic waist belt with a snug fit.
Sensor output was analyzed based on location, activity type, and mounting fit.

Main Results:

Sensor location and activity type significantly influenced sensor output.
The most lateral positions on the waist belt showed the least interference.
A loose fit generally decreased sensor output, except during deskwork where it increased.

Conclusions:

For increased reliability and reduced variability, place activity sensors in the most lateral positions on a participant's waist belt.
Ensure sensors are fitted tightly to the body for optimal performance.
Slightly forward placement is acceptable if the sensor impedes movement, but tight fitting remains essential.