Caffeine intake, short bouts of physical activity, and energy expenditure: a double-blind randomized crossover trial

PA energy expenditure (PAEE) is the most variable component of Total Energy Expenditure (TEE) and largely due to the balance of sedentary time (SedT) and low intensity physical activity (LIPA). There has been an emergence for seeking an understanding of factors which determine variations in SedT, LI...

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Bibliographic Details
Published in:PloS one 2013-07, Vol.8 (7), p.e68936-e68936
Main Authors: Júdice, Pedro B, Matias, Catarina N, Santos, Diana A, Magalhães, João P, Hamilton, Marc T, Sardinha, Luís B, Silva, Analiza M
Format: Article
Language:English
Subjects:
Accelerometers
Accelerometry
Adult
Adults
Alertness
Behavior
Body weight
Caffeine
Caffeine - pharmacology
Calorimetry
Clinical trials
Cross-Over Studies
Cups
Dextrins
Diet
Dietary intake
Dietary supplements
Double-Blind Method
Double-blind studies
Energy
Energy expenditure
Energy Metabolism
Exercise
Human performance
Humans
Insulin resistance
Interdisciplinary aspects
Laboratories
Living conditions
Maltodextrin
Mathematical analysis
Metabolism
Mortality
Motor Activity
Obesity
Physical activity
Physical fitness
Sedentary behavior
Studies
Tea
Type 2 diabetes
Vigor
Washout
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Summary:PA energy expenditure (PAEE) is the most variable component of Total Energy Expenditure (TEE) and largely due to the balance of sedentary time (SedT) and low intensity physical activity (LIPA). There has been an emergence for seeking an understanding of factors which determine variations in SedT, LIPA, and PAEE. Sedentary behavior and physical activity are relatively resistant to change by experimental dietary treatments and significant body weight changes. Although caffeine (Caf) is by far the most heavily used nutritional agent ingested to promote a sense of vigor/alertness, it is still unknown if Caf is effective in increasing PAEE and physical activity. The aim of the study was to test the hypothesis that 2 daily doses of Caf (as a capsule to blind the treatment and divided equally during breakfast and lunch) increase PAEE and TEE, and it would do so through increasing the frequent and brief bouts of physical activity (~1-5 min long) through the day as measured by accelerometry. In 21 low Caf users (
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0068936