scholarly journals Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans

1999 ◽  
Vol 70 (6) ◽  
pp. 1040-1045 ◽  
Author(s):  
Abdul G Dulloo ◽  
Claudette Duret ◽  
Dorothée Rohrer ◽  
Lucien Girardier ◽  
Nouri Mensi ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Green Tea ◽  
Fat Oxidation ◽  
Green Tea Extract ◽  
Tea Extract

Green tea extract improves endurance capacity and increases muscle lipid oxidation in mice

2005 ◽  
Vol 288 (3) ◽  
pp. R708-R715 ◽  
Author(s):  
Takatoshi Murase ◽  
Satoshi Haramizu ◽  
Akira Shimotoyodome ◽  
Azumi Nagasawa ◽  
Ichiro Tokimitsu
Keyword(s):  
Fatty Acid ◽  
Green Tea ◽  
Epigallocatechin Gallate ◽  
Fat Oxidation ◽  
Green Tea Extract ◽  
Endurance Capacity ◽  
Oxidation Activity ◽  
Tea Extract ◽  
High Level ◽  
Dose Dependent

Green tea contains a high level of polyphenolic compounds known as catechins. We investigated the effects of green tea extract (GTE), which is rich in catechins, on endurance capacity, energy metabolism, and fat oxidation in BALB/c mice over a 10-wk period. Swimming times to exhaustion for mice fed 0.2–0.5% (wt/wt) GTE were prolonged by 8–24%. The effects were dose dependent and accompanied by lower respiratory quotients and higher rates of fat oxidation as determined by indirect calorimetry. In addition, feeding with GTE increased the level of β-oxidation activity in skeletal muscle. Plasma lactate concentrations in mice fed GTE were significantly decreased after exercise, concomitant with increases in free fatty acid concentrations in plasma, suggesting an increased lipid use as an energy source in GTE-fed mice. Epigallocatechin gallate (EGCG), a major component of tea catechins, also enhanced endurance capacity, suggesting that the endurance-improving effects of GTE were mediated, at least in part, by EGCG. The β-oxidation activity and the level of fatty acid translocase/CD36 mRNA in the muscle was higher in GTE-fed mice compared with control mice. These results indicate that GTE are beneficial for improving endurance capacity and support the hypothesis that the stimulation of fatty acid use is a promising strategy for improving endurance capacity.

The Effects of EGCG on Fat Oxidation and Endurance Performance in Male Cyclists

2009 ◽  
Vol 19 (6) ◽  
pp. 624-644 ◽  
Author(s):  
Sara Dean ◽  
Andrea Braakhuis ◽  
Carl Paton
Keyword(s):  
Fatty Acids ◽  
Green Tea ◽  
Time Trial ◽  
Endurance Performance ◽  
Fat Oxidation ◽  
Cycling Performance ◽  
Green Tea Extract ◽  
Endurance Capacity ◽  
Caffeine Ingestion ◽  
Tea Extract

Researchers have long been investigating strategies that can increase athletes’ ability to oxidize fatty acids and spare carbohydrate, thus potentially improving endurance capacity. Green-tea extract (epigallocatechin-3-gallate; EGCG) has been shown to improve endurance capacity in mice. If a green-tea extract can stimulate fat oxidation and as a result spare glycogen stores, then athletes may benefit through improved endurance performance. Eight male cyclists completed a study incorporating a 3-way crossover, randomized, placebo-controlled, double-blinded, diet-controlled research design. All participants received 3 different treatments (placebo 270 mg, EGCG 270 mg, and placebo 270 mg + caffeine 3 mg/kg) over a 6-day period and 1 hr before exercise testing. Each participant completed 3 exercise trials consisting of 60 min of cycling at 60% maximum oxygen uptake (VO2max) immediately followed by a self-paced 40-km cycling time trial. The study found little benefit in consuming green-tea extract on fat oxidation or cycling performance, unlike caffeine, which did benefit cycling performance. The physiological responses observed during submaximal cycling after caffeine ingestion were similar to those reported previously, including an increase in heart rate (EGCG 147 ± 17, caffeine 146 ± 19, and placebo 144 ± 15 beats/min), glucose at the 40-min exercise time point (placebo 5.0 ± 0.8, EGCG 5.4 ± 1.0, and caffeine 5.8 ± 1.0 mmol/L), and resting plasma free fatty acids and no change in the amount of carbohydrate and fat being oxidized. Therefore, it was concluded that green-tea extract offers no additional benefit to cyclists over and above those achieved by using caffeine.

The Effect Of Green Tea Extract And High Intensity Intermittent Exercise On Fat Oxidation

2011 ◽  
Vol 43 (Suppl 1) ◽  
pp. 813
Author(s):  
Ehsan Ghahramanloo ◽  
Yati N. Boutcher ◽  
Stephen H. Boutcher
Keyword(s):  
Green Tea ◽  
High Intensity ◽  
Intermittent Exercise ◽  
Fat Oxidation ◽  
Green Tea Extract ◽  
Tea Extract

scholarly journals The Effect of Green Tea Extract on Fat Oxidation at Rest and during Exercise: Evidence of Efficacy and Proposed Mechanisms

2013 ◽  
Vol 4 (2) ◽  
pp. 129-140 ◽  
Author(s):  
Adrian B. Hodgson ◽  
Rebecca K. Randell ◽  
Asker E. Jeukendrup
Keyword(s):  
Green Tea ◽  
Fat Oxidation ◽  
Green Tea Extract ◽  
Tea Extract

Exercise and Green Tea Extract Stimulate Fat Oxidation and Prevent Obesity in Mice

2005 ◽  
Vol 37 (11) ◽  
pp. 1884-1892 ◽  
Author(s):  
AKIRA SHIMOTOYODOME ◽  
SATOSHI HARAMIZU ◽  
MISAKO INABA ◽  
TAKATOSHI MURASE ◽  
ICHIRO TOKIMITSU
Keyword(s):  
Green Tea ◽  
Fat Oxidation ◽  
Green Tea Extract ◽  
Obesity In Mice ◽  
Tea Extract

scholarly journals Green tea extract ingestion increases fat oxidation during exercise in humans

2007 ◽  
Vol 21 (6) ◽  
Author(s):  
Michelle Clare Venables ◽  
Carl J Hulston ◽  
Asker E Jeukendrup
Keyword(s):  
Green Tea ◽  
Fat Oxidation ◽  
Green Tea Extract ◽  
Tea Extract ◽  
Exercise In Humans

No Effect of 1 or 7 d of Green Tea Extract Ingestion on Fat Oxidation during Exercise

2013 ◽  
Vol 45 (5) ◽  
pp. 883-891 ◽  
Author(s):  
REBECCA K. RANDELL ◽  
ADRIAN B. HODGSON ◽  
SILVINA B. LOTITO ◽  
DORIS M. JACOBS ◽  
NIELS BOON ◽  
...  
Keyword(s):  
Green Tea ◽  
Fat Oxidation ◽  
Green Tea Extract ◽  
Tea Extract
Sign in / Sign up

Export Citation Format

Share Document