Abstract
Purpose: This study compared the accuracy of physical activity energy expenditure (PAEE) prediction using 2 methods of accounting for age dependency versus 1 standard (single) value across all ages. Methods: PAEE estimates were derived by pooling data from 5 studies. Participants, 6-18 years (n = 929), engaged in 14 activities while in a room calorimeter or wearing a portable metabolic analyzer. Linear regression was used to estimate the measurement error in PAEE (expressed as youth metabolic equivalent) associated with using age groups (6-9, 10-12, 13-15, and 16-18 y) and age-in-years [each year of chronological age (eg, 12 = 12.0-12.99 y)] versus the standard (a single value across all ages). Results: Age groups and age-in-years showed similar error, and both showed less error than the standard method for cycling, skilled, and moderate-to vigorous-intensity activities. For sedentary and light activities, the standard had similar error to the other 2 methods.Mean values for root mean square error ranged from 0.2 to 1.7 youth metabolic equivalent across all activities. Error reduction ranged from -0.2% to 21.7% for age groups and -0.23% to 18.2% for age-in-years compared with the standard. Conclusions: Accounting for age showed lower errors than a standard (single) value; using an age-dependent model in the Youth Compendium is recommended.
Original language | English (US) |
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Pages (from-to) | 144-151 |
Number of pages | 8 |
Journal | Pediatric Exercise Science |
Volume | 30 |
Issue number | 1 |
DOIs | |
State | Published - Feb 2018 |
Keywords
- Adolescents
- Children
- Energy expenditure
- MET
ASJC Scopus subject areas
- Pediatrics, Perinatology, and Child Health
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation