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

• Autorzy: Arsalan Damirchi , Farhad Rahmani-Nia , Bahman Mirzaie , Sadegh Hasan-Nia , Mohsen Ebrahimi
• Języki publikacji: EN

Abstrakty

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.

Słowa kluczowe

EN

Caffeine; Body composition; Responses to exercise

• Czasopismo: Biomedical Human Kinetics
• Rocznik: 2009
• Tom: 1
• Strony: 31-35

Daty

wydano

2009-01-01

online

2009-09-08

Twórcy

autor

Arsalan Damirchi

• Department of Sport Sciences, University of Guilan

autor

Farhad Rahmani-Nia

• Department of Sport Sciences, University of Guilan

autor

Bahman Mirzaie

• Department of Sport Sciences, University of Guilan

autor

Sadegh Hasan-Nia

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

autor

Mohsen Ebrahimi

• Department of Sport Sciences, University of Guilan

Bibliografia

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Identyfikatory

DOI

10.2478/v10101-009-0009-7