24-Hour Movement and Nonmovement Behaviors in Older Adults. The IMPACT65+ Study

Introduction The aims of this study were: (i) to provide a detailed description of movement and non-movement behaviors objectively-assessed over the complete 24-hour period in a sample of older adults, and (ii) to analyze differences in these behaviors by sex, age, educational level, body mass index, self-rated health, and chronic conditions. Methods The sample comprised 607 high-functioning community-dwelling older adults (383 women), aged 65 to 92 years, who participated in the IMPACT65+ study. Movement and non-movement behaviors were assessed by the Intelligent Device for Energy Expenditure and Activity, which provide estimates on both temporal and spatial gait parameters, and identify specific functional activities on the basis of acceleration and position information. Results The final sample with valid data was 432 older adults (284 women). Around 30.7% of daily time was engaged in sedentary behavior (SB), while 33.5% and 35.8% was represented by physical activity (PA) and sleep, respectively. Sitting passive was the most prevalent SB (vs. lying and reclining), while most of light PA was by standing (vs. active sitting and walking at

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