Green tea catechin consumption enhances exercise-induced abdominal fat loss in overweight and obese adults.
This study evaluated the influence of a green tea catechin beverage on body composition and fat distribution in overweight and obese adults during exercise-induced weight loss. Participants (n = 132 with 107 completers) were randomly assigned to receive a beverage containing approximately 625 mg of catechins with 39 mg caffeine or a control beverage (39 mg caffeine, no catechins) for 12 wk. Participants were asked to maintain constant energy intake and engage in >or=180 min/wk moderate intensity exercise, including >or=3 supervised sessions per week. Body composition (dual X-ray absorptiometry), abdominal fat areas (computed tomography), and clinical laboratory tests were measured at baseline and wk 12. There was a trend (P = 0.079) toward greater loss of body weight in the catechin group compared with the control group; least squares mean (95% CI) changes, adjusted for baseline value, age, and sex, were -2.2 (-3.1, -1.3) and -1.0 (-1.9, -0.1) kg, respectively. Percentage changes in fat mass did not differ between the catechin [5.2 (-7.0, -3.4)] and control groups [-3.5 (-5.4, 1.6)] (P = 0.208). However, percentage changes in total abdominal fat area [-7.7 (-11.7, -3.8) vs. -0.3 (-4.4, 3.9); P = 0.013], subcutaneous abdominal fat area [-6.2 (-10.2, -2.2) vs. 0.8 (-3.3, 4.9); P = 0.019], and fasting serum triglycerides (TG) [-11.2 (-18.8, -3.6) vs. 1.9 (-5.9, 9.7); P = 0.023] were greater in the catechin group. These findings suggest that green tea catechin consumption enhances exercise-induced changes in abdominal fat and serum TG.
Maki
Kevin C
KC
Provident Clinical Research, Bloomington, IN 47403, USA. kmaki@providentcrc.com
Reeves
Matthew S
MS
Farmer
Mildred
M
Yasunaga
Koichi
K
Matsuo
Noboru
N
Katsuragi
Yoshihisa
Y
Komikado
Masanori
M
Tokimitsu
Ichiro
I
Wilder
Donna
D
Jones
Franz
F
Blumberg
Jeffrey B
JB
Cartwright
Yolanda
Y
D050153:Abdominal Fat / Q000000981:diagnostic imaging; D015502:Absorptiometry, Photon; D000328:Adult; D000368:Aged; D002392:Catechin / Q000008:administration & dosage*; D004311:Double-Blind Method; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000000981:diagnostic imaging / Q000503:physiopathology*; D050177:Overweight / Q000000981:diagnostic imaging / Q000503:physiopathology*; D013662:Tea / Q000737:chemistry*; D015431:Weight Loss
D013662:Tea; D002392:Catechin