Cafeína + te verde y pérdida de grasa

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Cafeína + te verde y pérdida de grasa

Notapor Fisio » Dom, 21 Feb 2016, 14:54

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DIETARY CAFFEINE AND POLYPHENOL SUPPLEMENTATION ENHANCES OVERALL METABOLIC RATE AND LIPID OXIDATION AT REST AND AFTER A BOUT OF SPRINT INTERVAL EXERCISE.
Jo, Edward; Lewis, Kiana; Higuera, Daniel; Hernandez, Joshua; Osmond, Adam; Directo, Dean; Wong, Michael
Published Ahead-of-Print
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Abstract

The purpose of this study was to investigate the effects of a caffeine-polyphenolic supplement on 1) metabolic rate and fat oxidation at rest and following a bout of sprint interval exercise (SIE) and 2) SIE performance. In a double-blind, randomized, placebo-controlled, crossover study and following an initial familiarization visit, 12 subjects (male: n=11; female: n=1) (body mass= 76.1+/-2.2 kg; height= 169.8+/-1.6 cm; BMI= 22.7+/-3.0 kg/m2; body fat %= 21.6+/-2.0%) underwent two testing sessions during which time they consumed either a caffeine-polyphenol supplement or placebo. After supplementation, resting energy expenditure, heart rate (HR), and blood pressure (BP) were assessed. Subsequently, subjects performed 30 minutes of SIE while researchers collected performance data. Subjects were then tested for post-SIE energy expenditure, HR, and BP. The caffeine-polyphenol treatment resulted in significantly (p<0.05) greater energy expenditure (+7.99% rest; +10.16% post-SIE), VO2 (+9.64% rest; +12.10% post-SIE), and fat oxidation rate (+10.60% rest; +9.76% post-SIE) vs. placebo at rest and post-SIE. No significant differences were detected for peak and average power at all sprint intervals between treatments. Post-SIE HR was significantly (p<0.05) greater with caffeine-polyphenol supplementation vs. placebo (90.8+/-3.5 vs. 85.1+/-3.6 bpm). There were no significant between-treatment differences for BP. It may be concluded that the observed thermogenic response post-SIE was directly attributable to caffeine-polyphenol supplementation as opposed to an indirect manifestation of enhanced performance and work output. Collectively, these results corroborate the use of dietary caffeine and polyphenols to support efforts to reduce adiposity and improve overall body composition especially in conjunction with sprint interval exercise.



http://journals.lww.com/nsca-jscr/Abstr ... 96665.aspx


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