TitleYouth Energy Expenditure During Common Free-Living Activities and Treadmill Walking.
Publication TypeJournal Article
Year of Publication2016
AuthorsSchuna, Jr, JM, Barreria, TV, Hsia, DS, Johnson, WD, Tudor-Locke, C
JournalJ Phys Act Health
Issue6 Suppl 1
Date Published2016 Jun
KeywordsAdolescent, Child, Energy Metabolism, Exercise, Exercise Test, Female, Humans, Male, Walking


BACKGROUND: Energy expenditure (EE) estimates for a broad age range of youth performing a variety of activities are needed.

METHODS: 106 participants (6-18 years) completed 6 free-living activities (seated rest, movie watching, coloring, stair climbing, basketball dribbling, jumping jacks) and up to 9 treadmill walking bouts (13.4 to 120.7 m/min; 13.4 m/min increments). Breath-by-breath oxygen uptake (VO2) was measured using the COSMED K4b2 and EE was quantified as youth metabolic equivalents (METy1:VO2/measured resting VO2, METy2:VO2/estimated resting VO2). Age trends were evaluated with ANOVA.

RESULTS: Seated movie watching produced the lowest mean METy1 (6- to 9-year-olds: 0.94 ± 0.13) and METy2 values (13- to 15-year-olds: 1.10 ± 0.19), and jumping jacks produced the highest mean METy1 (13- to 15-year-olds: 6.89 ± 1.47) and METy2 values (16- to 18-year-olds: 8.61 ± 2.03). Significant age-related variability in METy1 and METy2 were noted for 8 and 2 of the 15 evaluated activities, respectively.

CONCLUSIONS: Descriptive EE data presented herein will augment the Youth Compendium of Physical Activities.

Alternate JournalJ Phys Act Health
PubMed ID27392374
PubMed Central IDPMC5108056
Grant ListR21 HD073807 / HD / NICHD NIH HHS / United States
U54 GM104940 / GM / NIGMS NIH HHS / United States