Effects of a 12-Week Exercise Intervention on Subsequent Compensatory Behaviors in Adolescent Girls: An Exploratory Study
| Autor: | Rachel Massie, James W. Smallcombe, Keith Tolfrey |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
030109 nutrition & dietetics Exercise intervention business.industry Physical activity Exploratory research VO2 max Physical Therapy Sports Therapy and Rehabilitation 030229 sport sciences 03 medical and health sciences 0302 clinical medicine Energy expenditure Pediatrics Perinatology and Child Health Cohort Medicine Orthopedics and Sports Medicine business Group level Weight status Demography |
| Zdroj: | Pediatric Exercise Science. 31:495-504 |
| ISSN: | 1543-2920 0899-8493 |
| DOI: | 10.1123/pes.2019-0012 |
| Popis: | Purpose: Chronic exercise programs can induce adaptive compensatory behavioral responses through increased energy intake (EI) and/or decreased free-living physical activity in adults. These responses can negate the benefits of an exercise-induced energy deficit; however, it is unclear whether young people experience similar responses. This study examined whether exercise-induced compensation occurs in adolescent girls. Methods: Twenty-three adolescent girls, heterogeneous for weight status, completed the study. Eleven adolescent girls aged 13 years completed a 12-week supervised exercise intervention (EX). Twelve body size–matched girls comprised the nonexercise control group (CON). Body composition, EI, free-living energy expenditure (EE), and peak oxygen uptake () were measured repeatedly over the intervention. Results: Laboratory EI (EX: 9027, 9610, and 9243 kJ·d−1 and CON: 9953, 9770, and 10,052 kJ·d−1 at 0, 12, and 18 wk, respectively; effect size [ES] = 0.26, P = .46) and free-living EI (EX: 7288, 6412, and 5273, 4916 kJ·d−1 and CON: 7227, 7128, and 6470, 6337 kJ·d−1 at 0, 6, 12, and 18 wk, respectively; ES ≤ 0.26, P = .90) did not change significantly over time and were similar between groups across the duration of the study. Free-living EE was higher in EX than CON (13,295 vs 12,115 kJ·d−1, ES ≥ 0.88, P ≥ .16), but no significant condition by time interactions were observed (P ≥ .17). Conclusion: The current findings indicate that compensatory changes in EI and EE behaviors did not occur at a group level within a small cohort of adolescent girls. However, analysis at the individual level highlights large interindividual variability in behaviors, which suggests a larger study may be prudent to extend this initial exploratory research. |
| Databáze: | OpenAIRE |
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