Detection of Lying Down, Sitting, Standing, and Stepping Using Two ActivPAL Monitors
| Autor: | David R. Bassett, Dinesh John, Brian C. Rider, Scott A. Conger, Justin M. Clark, Ryan M. Passmore |
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| Rok vydání: | 2014 |
| Předmět: |
Adult
medicine.medical_specialty Supine position Adolescent Movement Posture Monitoring Ambulatory Physical Therapy Sports Therapy and Rehabilitation Accelerometer Sitting Young Adult Prone Position medicine Humans Orthopedics and Sports Medicine Right Thigh Light Activity business.industry Reproducibility of Results Torso Middle Aged Prone position medicine.anatomical_structure Thigh Physical therapy business Lying |
| Zdroj: | Medicine & Science in Sports & Exercise. 46:2025-2029 |
| ISSN: | 0195-9131 |
| Popis: | AB The activPAL is an accelerometer-based monitor worn on the thigh that classifies daily activities into three categories (sitting/lying down, standing, and stepping). The monitor discriminates between sitting/lying and the upright position by detecting the inclination of the thigh. It detects stepping from the acceleration versus time wave form. However, a current limitation of the activPAL is that it does not discriminate between sitting and lying down. Purpose: This study aimed to determine whether placing a second activPAL monitor on the torso would allow the detection of seated versus lying postures. Methods: Fifteen healthy adults (18-55 yr of age) wore an activPAL on the right thigh and another activPAL over the right rib cage. Both monitors were synchronized and initialized to record data in 15-s epochs. Participants performed a semistructured routine of activities for 3 min each. Activities included lying down (while supine, prone, and on the side), sitting, standing, sweeping, treadmill walking at 3 mph, and treadmill running at 6 mph. The spatial orientation of the thigh and chest monitors was used to determine body posture, and the activPAL on the thigh was used to detect ambulation. Results: The use of two activPAL devices enabled four behaviors to be accurately classified. The percentages of observations that were classified accurately were as follows: lying down (100%), sitting (100%), standing/light activity in the upright position (90.8%), and stepping (100%). Conclusions: The current method allows researchers to obtain more detailed information on postural allocation compared with that in the use of a single activPAL on the thigh |
| Databáze: | OpenAIRE |
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