Summary
Assessing children’s 24-hour movement behaviors (i.e., time spent active, sedentary, and asleep) can reveal the complex and interdependent ways energy expenditure and sleep are related to health outcomes. However, assessing energy expenditure and sleep among children in free-living conditions is inherently difficult, and no single method is without limitation. A combination of heart rate and accelerometry data provides a more precise estimate of energy expenditure and sleep than either heart rate or accelerometry alone, when compared to a criterion measure of indirect calorimetry or polysomnog
