| The effect of advice to walk 2000 extra steps daily on food intake. | |
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MedLine Citation:
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PMID: 16911238 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: It is currently unclear how physical activity and diet interact within the ranges of activity seen in the general population. This study aimed to establish whether a small, acute, increase in physical activity would lead to compensatory change in energy intake and nutrient balance, and to provide power analysis data for future research in this field. METHOD: Twelve participants were studied over 7 days of habitual activity and 2 weeks after instruction to increase physical activity by 2000 steps per day. Physical activity was assessed using a diary, the 'activPAL' activity monitor and a pedometer. Dietary analyses from prospective food diaries were compared between the first and third weeks. RESULTS: Participants increased step-counts (+2600 steps per day, P = 0.008) and estimated energy expenditure (+300-1000 kJ day(-1), P = 0.002) but did not significantly change their energy intake, dietary composition or number of meals per day. From reverse power analysis 38 participants would be needed to exclude a change in energy intake of 400 kJ day(-1) with 90% power at P < 0.05; 400 kJ day(-1) would compensate for a 2000 steps per day increase in physical activity. CONCLUSION: These results did not demonstrate any compensatory increase in food consumption when physical activity was increased by walking an average of 2600 additional steps per day. Power analysis indicates that a larger study (n = 38) will be necessary to exclude such an effect with confidence. |
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Authors:
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A-A Koulouri; W W Tigbe; M E J Lean |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of human nutrition and dietetics : the official journal of the British Dietetic Association Volume: 19 ISSN: 0952-3871 ISO Abbreviation: J Hum Nutr Diet Publication Date: 2006 Aug |
Date Detail:
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Created Date: 2006-08-16 Completed Date: 2006-12-05 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8904840 Medline TA: J Hum Nutr Diet Country: England |
Other Details:
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Languages: eng Pagination: 263-6 Citation Subset: IM |
Affiliation:
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Department of Human Nutrition, Division of Developmental Medicine, University of Glasgow, Glasgow, UK. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Energy Intake / physiology* Evidence-Based Medicine Exercise / physiology* Exercise Therapy* Female Health Promotion Humans Male Obesity / prevention & control, therapy* Statistics as Topic Walking* |
| Comments/Corrections | |
Comment In:
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J Hum Nutr Diet. 2006 Aug;19(4):249-51
[PMID:
16911236
]
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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