Document Detail


Physical activity self-monitoring and weight loss: 6-month results of the SMART trial.
MedLine Citation:
PMID:  21200337     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
INTRODUCTION: Weight loss has been associated with higher physical activity (PA) levels and frequent dietary self-monitoring. Less is known about how PA self-monitoring affects adherence to PA goals, PA levels, and weight change.
METHODS: The SMART Trial is a clinical weight loss trial in which 210 overweight adults were randomized equally to one of three arms: 1) paper record (PR), 2) personal digital assistant with self-monitoring software (PDA), and 3) PDA with daily tailored feedback message (PDA + FB). PA self-monitoring and adherence to PA goals were based on entries in weekly submitted diaries. PA levels were measured via self-report by the past 6-month Modifiable Activity Questionnaire at baseline and 6 months.
RESULTS: Data are presented on 189 participants with complete 6-month PA data (84% female, 77% white, mean age = 47.3 ± 8.8 yr, mean body mass index = 34.1 ± 4.5 kg·m(-2)). Median PA level was 7.96 MET·h·wk(-1) at baseline and 13.4 MET·h·wk(-1) at 6 months, with significant PA increases in all three arms. PDA + FB arm had a higher mean number of weekly self-monitoring entries than the PR arm (3.4 vs 2.4, P = 0.003) and were more likely to maintain high (i.e., 100%) adherence to PA goals over time than the PDA (P = 0.02) or PR arms (P = 0.0003). Both PA self-monitoring and adherence to PA goals were related to higher PA levels at 6 months. A higher mean rate of PA self-monitoring was associated with a greater percentage of weight decrease (ρ = -0.49, P < 0.0001) at 6 months.
CONCLUSIONS: PA self-monitoring and adherence to PA goals were more likely in participants in the PDA + FB arm and in turn predicted higher PA levels and weight loss.
Authors:
Molly B Conroy; Kyeongra Yang; Okan U Elci; Kelley Pettee Gabriel; Mindi A Styn; Jing Wang; Andrea M Kriska; Susan M Sereika; Lora E Burke
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  43     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2011 Aug 
Date Detail:
Created Date:  2011-07-18     Completed Date:  2011-11-29     Revised Date:  2014-09-14    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1568-74     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Adult
Body Mass Index
Diagnostic Self Evaluation*
Feeding Behavior / physiology
Female
Humans
Male
Middle Aged
Monitoring, Physiologic / methods*
Motor Activity / physiology*
Overweight / therapy*
Patient Compliance
Questionnaires
Weight Loss / physiology*
Grant Support
ID/Acronym/Agency:
K23 HL085405/HL/NHLBI NIH HHS; K23 HL085405/HL/NHLBI NIH HHS; K24 NR010742/NR/NINR NIH HHS; R01 DK071817/DK/NIDDK NIH HHS; R01 DK071817/DK/NIDDK NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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