Researcher Rehabilitation Research Institute, National Rehabilitation Center, Republic of Korea Seoul, Republic of Korea
Research Objectives: To compare the IMU sensor-based estimated MET value and the Compendium MET value of stroke patients to confirm the difference and to suggest the need for a more accurate physical activity estimation study for stroke patients in the future.
Design: cross-sectional study.
Setting: Hospitalized care.
Participants: Seven stroke inpatients were participated in the study.
Interventions: Seven stroke inpatients wore IMU sensors on both wrists and ankles, and one observer monitored the patient's actual activity to check the activity status. Subjects were received rehabilitation training programs such as robot rehabilitation training, physical therapy, occupational therapy, pain therapy, speech therapy, and psychological therapy, and performed individual exercises separately.
Main Outcome Measures: The MET value was calculated through the 'count' value measured by the IMU sensor, and the monitored activity derived the MET value according to the activity classification of Compendium.
Results: The correlation between MET estimated by the accelerometer and Compendium MET showed a strong positive correlation in the unaffected ankle (r=0.695, p< 0.01). MET values differed depending on the wearing part, and there was a strong correlation with the ankle (unaffected lower extremity r=0.695; affected lower extremity r=0.634), but there was no or low correlation with the wrist (unaffected upper extremity r=-0.086; Affected upper extremity r=-0.276).
Conclusions: In order to estimate the physical activity of stroke patients using wearable sensors, the sensor should be attached to the ankle rather than the wrist. In order to more accurately estimate the amount of physical activity of stroke patients, a new method of estimating physical activity should be devised in consideration of the stroke patient's functions and activities of daily living.
Author(s) Disclosures: Nothing to specify about conflicts of interest.
Learning Objectives:
Check the Metabolic Equivalent Task estimation method using the IMU sensor.
Check the overview of Compendium MET.
Find out the cause of the difference between the amount of physical activity using the IMU sensor of stroke patients and the result of Compendium MET.
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.jpg "Sung Shin Kim, PhD photo")
