Abstract
The purpose of this study was to estimate daily body postures using accelerometers. First, we obtained reference values for body postures (i.e., lying (supine, on the side, and prone), sitting, standing) using two triaxial accelerometers. Second, we estimated body postures for 24 h using these reference values. We assessed the concordance rate of daytime body postures using a lifetime survey and reference values. The concordance rate for continued maintenance of body postures for less than 5 min was significantly low. That was attributed to omissions from the lifetime survey. The rate of supine lying was significantly higher than side or prone lying. The reference value obtained using two triaxial accelerometers might offer a useful parameter to assess daily body postures.
