社交活动有利于保持苗条身材
<p><span word="Keeping">Keeping</span> <span word="a">a</span> <span word="busy">busy</span> <span word="social">social</span> <span word="life">life</span> <span word="amongst">amongst</span> <span word="lots">lots</span> <span word="of">of</span> <span word="friends">friends</span> <span word="may">may</span> <span word="keep">keep</span> <span word="people">people</span> <span word="slimmer">slimmer</span> <span word="than">than</span> <span word="spending">spending</span> <span word="several">several</span> <span word="hours">hours</span> <span word="on">on</span> <span word="a">a</span> <span word="treadmill">treadmill</span>, <span word="according">according</span> <span word="to">to</span> <span word="scientists">scientists</span>。</p><p>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。</p><p><span word="Scientists">Scientists</span> <span word="believe">believe</span> <span word="social">social</span> <span word="activities">activities</span> <span word="can">can</span> <span word="release">release</span> <span word="a">a</span> <span word="brain">brain</span> <span word="chemical">chemical</span> <span word="that">that</span> <span word="converts">converts</span> <span word="white">white</span> <span word="fat">fat</span> <span word="into">into</span> <span word="brown">brown</span> <span word="fat">fat</span>. <span word="Brown">Brown</span> <span word="fat">fat</span> <span word="burns">burns</span> <span word="calories">calories</span> <span word="to">to</span> <span word="generate">generate</span> <span word="heat">heat</span>, <span word="while">while</span> <span word="white">white</span> <span word="fat">fat</span> <span word="stores">stores</span> <span word="calories">calories</span> <span word="and">and</span> <span word="makes">makes</span> <span word="us">us</span> <span word="fatter">fatter</span>。</p><p>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。</p><p><span word="Converting">Converting</span> <span word="white">white</span> <span word="fat">fat</span> <span word="into">into</span> <span word="brown">brown</span> <span word="fat">fat</span> <span word="is">is</span> <span word="very">very</span> <span word="difficult">difficult</span>, <span word="normally">normally</span> <span word="requiring">requiring</span> <span word="long">long</span>-<span word="term">term</span> <span word="exposure">exposure</span> <span word="to">to</span> <span word="cold">cold</span> <span word="conditions">conditions</span> <span word="or">or</span> <span word="activating">activating</span> <span word="part">part</span> <span word="of">of</span> <span word="the">the</span> <span word="body">body</span>'<span word="s">s</span> <span word="nervous">nervous</span> <span word="system">system</span>. <span word="However">However</span>, <span word="scientists">scientists</span> <span word="from">from</span> <span word="Ohio">Ohio</span> <span word="State">State</span> <span word="University">University</span> <span word="think">think</span> <span word="that">that</span> <span word="having">having</span> <span word="a">a</span> <span word="busy">busy</span> <span word="social">social</span> <span word="life">life</span> <span word="is">is</span> <span word="an">an</span> <span word="even">even</span> <span word="more">more</span> <span word="effective">effective</span> <span word="way">way</span> <span word="of">of</span> <span word="carrying">carrying</span> <span word="out">out</span> <span word="this">this</span> <span word="conversion">conversion</span>。</p><p>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。</p><p><span word="Tests">Tests</span> <span word="on">on</span> <span word="mice">mice</span> <span word="showed">showed</span> <span word="that">that</span> <span word="those">those</span> <span word="lived">lived</span> <span word="in">in</span> <span word="large">large</span> <span word="communities">communities</span> <span word="and">and</span> <span word="had">had</span> <span word="more">more</span> <span word="space">space</span> <span word="and">and</span> <span word="toys">toys</span> <span word="lost">lost</span> <span word="half">half</span> <span word="of">of</span> <span word="their">their</span> <span word="abdominal">abdominal</span> <span word="weight">weight</span> <span word="in">in</span> <span word="four">four</span> <span word="weeks">weeks</span>, <span word="even">even</span> <span word="if">if</span> <span word="they">they</span> <span word="ate">ate</span> <span word="more">more</span> <span word="than">than</span> <span word="those">those</span> <span word="in">in</span> <span word="boring">boring</span>, <span word="lonely">lonely</span> <span word="environments">environments</span>. <span word="Researchers">Researchers</span> <span word="said">said</span> <span word="that">that</span> <span word="social">social</span> <span word="stimulation">stimulation</span> <span word="aids">aids</span> <span word="weight">weight</span> <span word="loss">loss</span>。</p>
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