Detection of lying down, sitting, standing, and stepping using two activPAL monitors.
Med Sci Sports Exerc
; 46(10): 2025-9, 2014 Oct.
Article
em En
| MEDLINE
| ID: mdl-24598698
ABSTRACT
UNLABELLED 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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Postura
/
Monitorização Ambulatorial
Tipo de estudo:
Diagnostic_studies
Limite:
Adolescent
/
Adult
/
Humans
/
Middle aged
Idioma:
En
Revista:
Med Sci Sports Exerc
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Marrocos