Exercise is a great way to lose weight, but exercise combined with green tea is even greater. A Penn State news release reports that researchers at the school found that high-fat-fed mice that exercised regularly and ingested green tea extract showed an average body mass reduction of 27.1 percent and an average abdominal fat mass reduction of 36.6 percent in just 16 weeks. Is that a lot? Well, mice that ingested green tea extract but did not exercise or those that exercised but were not given green tea extract experienced less significant changes in weight and health measurements. Wait, there’s more: the mice on the green-tea-extract-and-exercise regimen also experienced a 17 percent reduction in fasting blood glucose level, a 65 percent decrease in plasma insulin level and reduction in insulin resistance of 65 percent. Tea — Camellia sinensis — is rich in catechins, polyphenols that are natural antioxidents. The latest mouse study, incidentally, was unsurprising to scientists who had been working with people: A recent analysis of 11 human trials with green tea preparations reported a 1.31 kilogram average body weight loss in intervention groups compared to control groups.