As soon as summer arrives, short-sleeved shorts make excess fat smooth, and many people choose the healthiest exercise to lose weight. However, foreign studies have confirmed that drinking tea before exercise, in which catechins contribute to lipid metabolism in the body, can effectively increase the fat consumption during 17% exercise by taking catechins after three meals and doing moderate-intensity bicycle exercise for 30 minutes. In the study published in the American Journal of Clinical Nutrition in 2008, 12 healthy men were cross-tested. Before moderate-intensity and 30-minute cycling exercise, catechin and placebo were ingested after three meals, respectively, in line with dietary restrictions. The results showed that compared with the placebo group, the catechin group could increase the fat oxidation rate by 17% under the same exercise amount. Another study in the Journal of Nutrition in 2009 also showed that after 12 weeks, the total abdominal fat and subcutaneous abdominal fat of tea drinkers decreased by 7.4% and 7% respectively. Obviously, exercise combined with drinking tea can increase the oxidation and consumption of abdominal fat. Liu Jiaoshou, Department of Nutrition and Health Care, Taipei Medical College, explained that during exercise, the body will secrete norepinephrine, and through a series of enzyme reactions, it will induce lipolytic enzymes to operate, transforming fat cells into energy needed for exercise. However, a COMT enzyme in the body can inhibit norepinephrine and affect the effect of fat cells being decomposed and consumed. Taking catechin can inhibit COMT, ensure that norepinephrine is not affected by COMT enzyme, and then increase the efficiency of exercise to reduce fat. According to domestic investigation, green tea on the market contains 369 mg of catechin per liter, followed by oolong tea with 204 mg per liter, and black tea with only 4 1.8 mg per liter. Liu reminded that if you want to buy tea products on the market, you must choose sugar-free ones to reduce fat, otherwise sugary drinks will get fatter and fatter! In addition, the elderly with gastrointestinal discomfort, osteoporosis, anemia, pregnant women and sleep disorders are not suitable for drinking green tea, oolong tea and other teas. It should be noted that eating and drinking tea will affect the absorption of iron and calcium in the body. It is recommended to drink tea 2 hours after meals, and not more than 2000c.c a day. The best time to help exercise to reduce fat is about half an hour before exercise 1 hour. If it is too close to the exercise time, it may not work. Liu stressed that a healthy way to lose weight depends not only on drinking tea, but also on exercise to effectively reduce fat! Subscribe to the health Aloha audio-visual channel, read health knowledge more easily, and pay attention to your health every day! Line @ ID: @:/beauty/article/9564/Study on the effect of burning fat by drinking tea before exercise increased 1 Cheng7 Keywords: burning fat, green tea, Liu, fat, catechin, norepinephrine.