Effect of caffeine on metabolic and cardiovascular responses to submaximal exercise in lean and obese men

• Authors: Arsalan Damirchi , Farhad Rahmani-Nia , Bahman Mirzaie , Sadegh Hasan-Nia , Mohsen Ebrahimi
• Languages of publication: EN

Abstracts

EN

Study aim: To compare the effects of caffeine on metabolic and cardiovascular responses to exercise in lean and obese subjects.Material and methods: In a double blind random design, 6 lean (BMI<20) and 6 obese (BMI>28) sedentary young men performed treadmill running for 30 min at similar exercise intensities (60% VO2max) one hour after caffeine (5 mg/kg body mass) or placebo ingestion. Gas exchange was measured by indirect calorimetry/open-circuit spirometry. Heart rate (HR) was measured throughout the exercise. Blood pressure (BP) measurements were taken at baseline, 1 h after caffeine/placebo ingestion and immediately after exercise. Repeated measures ANOVA was used in data analysis.Results: Caffeine significantly (p<0.05 - 0.01) increased the exercise-induced oxygen uptake, energy expenditure, systolic blood pressure and heart rate in both groups, the respiratory exchange ratio remaining unchanged. The effects of caffeine were in both groups alike.Conclusions: Caffeine activates metabolism without inducing major changes in fat/carbohydrate oxidation. The differences in body fat content seem not to affect the caffeine-induced effects in a submaximal exercise.

Keywords

EN

Caffeine; Body composition; Responses to exercise

• Publisher: Versita
• Journal: Biomedical Human Kinetics
• Year: 2009
• Volume: 1
• Pages: 31-35

Dates

published

1 - 1 - 2009

online

8 - 9 - 2009

Contributors

author

Arsalan Damirchi

• Department of Sport Sciences, University of Guilan

author

Farhad Rahmani-Nia

• Department of Sport Sciences, University of Guilan

author

Bahman Mirzaie

• Department of Sport Sciences, University of Guilan

author

Sadegh Hasan-Nia

• Faculty of Sciences, University of Guilan, Rasht, Iran

author

Mohsen Ebrahimi

• Department of Sport Sciences, University of Guilan

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Identifiers

DOI

10.2478/v10101-009-0009-7