No evidence of reactivity in accelerometry-based measurement of physical activity and sleep.

ABSTRACT:

Objective

Accelerometry provides more objective estimates of physical activity and sleep parameters than self-report data. However, the use of accelerometry may suffer from reactivity to measurement, that is, changes in behaviour under study due to the awareness of being observed.

Design

In two field-experimental studies, we examined reactivity to measurement in physical activity and sleep parameters estimated with accelerometry. We used within-subjects designs and manipulated if participants were made aware of the measurement intention or if it was concealed.

Methods

During a 2-week study, participants received a red accelerometer for one of the weeks and were informed that their physical activity would be monitored in this week. In the other week, participants recei

SUBMITTER: Hausser JA 

PROVIDER: S-EPMC12750485 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature