Caffeine consumption around an exercise bout: effects on energy expenditure, energy intake, and exercise enjoyment

Schubert, Matthew M., Hall, Susan, Leveritt, Michael, Grant, Gary, Sabapathy, Surendran and Desbrow, Ben (2014) Caffeine consumption around an exercise bout: effects on energy expenditure, energy intake, and exercise enjoyment. Journal of Applied Physiology, 117 7: 745-754. doi:10.1152/japplphysiol.00570.2014


Author Schubert, Matthew M.
Hall, Susan
Leveritt, Michael
Grant, Gary
Sabapathy, Surendran
Desbrow, Ben
Title Caffeine consumption around an exercise bout: effects on energy expenditure, energy intake, and exercise enjoyment
Journal name Journal of Applied Physiology   Check publisher's open access policy
ISSN 1522-1601
8750-7587
Publication date 2014-10-01
Sub-type Article (original research)
DOI 10.1152/japplphysiol.00570.2014
Open Access Status DOI
Volume 117
Issue 7
Start page 745
End page 754
Total pages 10
Place of publication Bethesda, MD, United States
Publisher American Physiological Society
Collection year 2015
Abstract Combining an exercise and nutritional intervention is arguably the optimal method of creating energy imbalance for weight loss. This study sought to determine whether combining exercise and caffeine supplementation was more effective for promoting acute energy deficits and manipulations to substrate metabolism than exercise alone. Fourteen recreationally active participants (mean ± SD body mass index: 22.7 ± 2.6 kg/m2) completed a resting control trial (CON), a placebo exercise trial (EX), and a caffeine exercise trial (EX+CAF, 2 × 3 mg/kg of caffeine 90 min before and 30 min after exercise) in a randomized, double-blinded design. Trials were 4 h in duration with 1 h of rest, 1 h of cycling at ∼65% power at maximum O2 consumption or rest, and a 2-h recovery. Gas exchange, appetite perceptions, and blood samples were obtained periodically. Two hours after exercise, participants were offered an ad libitum test meal where energy and macronutrient intake were recorded. EX+CAF resulted in significantly greater energy expenditure and fat oxidation compared with EX (+250 kJ; +10.4 g) and CON (+3,126 kJ; +29.7 g) (P = 0.05). A trend for reduced energy and fat intake compared with CON (-718 kJ; -8 g) (P = 0.055) was observed. Consequently, EX+CAF created a greater energy deficit (P < 0.05). Caffeine also led to exercise being perceived as less difficult and more enjoyable (P < 0.05). Combining caffeine with exercise creates a greater acute energy deficit, and the implications of this protocol for weight loss or maintenance over longer periods of time in overweight/obese populations should be further investigated.
Keyword Appetite
Caffeine
Exercise
Exercise enjoyment
Fat oxidation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Human Movement and Nutrition Sciences Publications
 
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