Thermogenic Effect from Nutritionally Enriched Coffee Consumption
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Thermogenic Effect from Nutritionally Enriched Coffee Consumption Jay R. Hoffman, Jie Kang, Nicholas A. Ratamess, Peter F. Jennings, Gerald Mangine, and Avery D. Faigenbaum The College of New Jersey, Ewing, NJ. Address correspondence to [email protected]
Received February 10, 2006/Accepted May 22, 2006 ABSTRACT Background: The purpose of this study was to examine the effect of nutritionally enriched JavaFit™ (JF) coffee (450 mg of caffeine, 1200 mg of garcinia cambogia, 360 mg of citrus aurantium extract, and 225 mcg of chromium polynicotinate) on resting oxygen uptake (VO2), respiratory exchange ratio (RER), heart rate (HR), and blood pressure (BP) in healthy and physically active individuals. Method: Ten subjects (8 male, 2 female; 20.9 ± 1.7y; 178.1 ± 10.4 cm; 71.8 ± 12.1 kg) underwent two testing sessions administered in a randomized and double-blind fashion. During each session, subjects reported to the Human Performance Laboratory after at least 3-h post-absorptive state and were provided either 354 ml (1.5 cups) of freshly brewed JF or commercially available caffeinated coffee (P). Subjects then rested in a semi-recumbent position for three hours. VO2 and HR were determined every 5 min during the first 30 min and every 10 min during the next 150 min. BP was determined every 15 min during the first 30 min and every 30 min thereafter. Area under the curve (AUC) analysis was computed for VO2, whereas a session-average was calculated for RER, HR and BP. Results: Initial analysis revealed no significant differences. However, seven of the ten subjects were considered responders to JF (had a higher AUC for VO2 during JF than P). Statistical analysis showed the difference between JF and P (12%) to be significantly different in these responders. In addition, the average systolic BP was higher (p
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