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Energy Cost Expression for a Youth Compendium of Physical Activities: Rationale for Using Age Groups
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2 01 2018
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Source: Pediatr Exerc Sci. 30(1):142-149
[PDF-659.32 KB]
Details:
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Alternative Title:Pediatr Exerc Sci
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Personal Author:
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Description:Purpose:
This study compared the accuracy of physical activity energy expenditure (PAEE) prediction using two methods of accounting for age dependency versus one standard (single) value across all ages.
Method:
PAEE estimates were derived by pooling data from five 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 METy) associated with using age-groups (6–9, 10–12, 13–15, and 16–18 years) and age-in-years (each year of chronological age (e.g., 12=12.0–12.99 years)) 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 two methods. Mean values for root mean square error ranged from 0.2–1.7 METy across all activities. Error reduction ranged from −0.2–21.7% for age-groups and −0.23–18.2% for age-in-years, compared to the standard.
Conclusion:
Accounting for age showed lower errors than a standard (single) value; using an age-dependent model in the Youth Compendium is recommended.
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Source:
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Pubmed ID:28787244
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Pubmed Central ID:PMC9643012
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Funding:
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Volume:30
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Issue:1
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