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Keeping a busy social life amongst lots of friends may keep people slimmer than spending several hours on a treadmill, according to scientists。 科学家研究发现，与在跑步机上锻炼几个小时相比，忙于参加朋友们的社交活动可能更有利于保持苗条身材。 Scientists believe social activities can release a brain chemical that converts white fat into brown fat. Brown fat burns calories to generate heat, while white fat stores calories and makes us fatter。 科学家认为，社交活动能使大脑释放一种化学物质，将白色脂肪转化为棕色脂肪，后者可以燃烧卡路里，产生热量，而白色脂肪却储存卡路里，使人长胖。 Converting white fat into brown fat is very difficult, normally requiring long-term exposure to cold conditions or activating part of the body's nervous system. However, scientists from Ohio State University think that having a busy social life is an even more effective way of carrying out this conversion。 白色脂肪转化为棕色脂肪出奇地难，通常需要长期暴露在寒冷的环境中，或者激活人体部分神经系统。但俄亥俄州立大学的科学家认为，繁忙的社交生活能更有效地进行这一转换。 Tests on mice showed that those lived in large communities and had more space and toys lost half of their abdominal weight in four weeks, even if they ate more than those in boring, lonely environments. Researchers said that social stimulation aids weight loss。 | 
