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Evaluating a Wearable Solution for Measuring Lower Extremity Asymmetry During Landing
Anu M Räisänen1,2, Lauren C Benson2,3, Jackie L Whittaker2,4,5,6
1From the: Department of Physical Therapy Education, College of Health Sciences - Northwest, Western University of Health Sciences, Lebanon, Oregon, United States.
Physiotherapy Canada. Physiotherapie Canada
|September 22, 2023
Summary
Wearable accelerometers show good agreement for measuring center of mass (COM) acceleration during landings, but not for tibial acceleration asymmetries. COM acceleration is a viable tool for rehabilitation monitoring.
Area of Science:
- Biomechanics
- Rehabilitation Technology
- Wearable Sensors
Background:
- Force plates are effective for monitoring landing asymmetries in rehabilitation but lack widespread availability.
- Accelerometer-based wearable technology presents a more accessible alternative for gait and landing analysis.
Purpose of the Study:
- To assess the agreement between impact accelerations measured by force plates and accelerometer-derived measures.
- To evaluate accelerometer-based center of mass (COM) acceleration and tibial acceleration asymmetries during bilateral landings.
Main Methods:
- Nineteen adults performed countermovement jumps (CMJ) and squat jumps (SJ) on force plates with accelerometers attached to the tibia and lower back.
- Bland and Altman 95% limits of agreement (95% LOA) were used to analyze the data.
Main Results:
- Acceptable agreement was found between impact accelerations and accelerometer-derived COM acceleration (mean differences: 0.24 g for CMJ, 0.38 g for SJ).
- Poor agreement was observed between impact accelerations and accelerometer-derived tibial acceleration asymmetries (mean differences: -6% for CMJ, 0% for SJ).
Conclusions:
- Accelerometer-based COM acceleration shows potential for quantifying landing impacts in rehabilitation settings.
- Accelerometer-derived tibial acceleration asymmetries are not a suitable substitute for force plate measurements.
- Further research is needed to establish normative values for lower extremity asymmetries during landing.
