Effects of open-loop feedback on physical activity and television viewing in overweight and obese children: a randomized, controlled trial.

Full Abstract

OBJECTIVES:
Television viewing and physical inactivity increase the risk of obesity in youth. Thus, identifying new interventions that increase physical activity and reduce television viewing would be helpful in the prevention and treatment of pediatric obesity. This study evaluated the effects of open-loop feedback plus reinforcement versus open-loop feedback alone on physical activity, targeted sedentary behavior, body composition, and energy intake in youth.

METHODS:
Thirty overweight or obese 8- to 12-year-old children were randomly assigned to an intervention (n = 14) or control group (n = 16). Participants wore accelerometers every day for 8 weeks and attended biweekly meetings to download the activity monitors. For children in the open-loop feedback plus reinforcement (intervention) group, accumulating 400 counts of physical activity on pedometers earned 1 hour of television/VCR/DVD time, which was controlled by a Token TV electronic device. Open-loop feedback control subjects wore activity monitors but had free access to targeted sedentary behavior.

RESULTS:
Compared with controls, the open-loop feedback plus reinforcement group demonstrated significantly greater increases in daily physical activity counts (+65% vs +16%) and minutes per day of moderate-to-vigorous physical activity (+9.4 vs +0.3) and greater reductions in minutes per day spent in television viewing (-116.1 vs +14.3). The intervention group also showed more favorable changes in body composition, dietary fat intake, and energy intake from snacks compared with controls. Reductions in sedentary behavior were directly related to reductions in BMI, fat intake, snack intake, and snack intake while watching television.

CONCLUSIONS:
Providing feedback of physical activity in combination with reinforcing physical activity with sedentary behavior is a simple method of modifying the home environment that may play an important role in treating and preventing child obesity.

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Author information

Author/s: Goldfield, Gary S (GS); Mallory, Risa (R); Parker, Torrey (T); Cunningham, Terrell (T); Legg, Christine (C); Lumb, Andrew (A); Parker, Kasey (K); Prud'homme, Denis (D); Gaboury, Isabelle (I); Adamo, Kristi B (KB);

Affiliation: Research Institute, Children's Hospital of Eastern Ontario, Mental Health Research, 401 Smyth Rd, Ottawa, Ontario, Canada K1H 8L1. ggoldfield(-atsign-)cheo.on.ca

Journal and publication information

Publication Type: Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't

Journal: Pediatrics (Pediatrics), published in United States. (Language: eng)

Reference: 2006-Jul; vol 118 (issue 1) : pp e157-66

Dates: Created 2006/07/04; Completed 2006/08/09; Revised 2006/11/15;

PMID: 16818530, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Health Promotion
Humans
Male
Motor Activity
Obesity - etiology; prevention & control
Overweight
Reinforcement, Social
Television

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