研究表明 健康行为也会像疾病一样传染
<p><span word="If">If</span> <span word="your">your</span> <span word="friends">friends</span> <span word="are">are</span> <span word="happy">happy</span>—<span word="turns">turns</span> <span word="out">out</span> <span word="you">you</span>'<span word="re">re</span> <span word="more">more</span> <span word="likely">likely</span> <span word="to">to</span> <span word="be">be</span> <span word="happy">happy</span> <span word="too">too</span>. <span word="If">If</span> <span word="your">your</span> <span word="friends">friends</span> <span word="are">are</span> <span word="overweight">overweight</span>, <span word="that">that</span> <span word="too">too</span> <span word="ups">ups</span> <span word="the">the</span> <span word="odds">odds</span> <span word="you">you</span>'<span word="ll">ll</span> <span word="pack">pack</span> <span word="on">on</span> <span word="pounds">pounds</span>.</p><p>如果你的朋友很快乐，那你也快乐的可能性很大。如果你的朋友体重超重，那你体重增加的几率也会上升。</p><p><span word="Those">Those</span> <span word="effects">effects</span> <span word="have">have</span> <span word="been">been</span> <span word="shown">shown</span> <span word="in">in</span> <span word="studies">studies</span>. <span word="And">And</span> <span word="now">now</span> <span word="researchers">researchers</span> <span word="have">have</span> <span word="identified">identified</span> <span word="another">another</span> <span word="seemingly">seemingly</span> <span word="contagious">contagious</span> <span word="quality">quality</span>: <span word="exercise">exercise</span>.</p><p>这些效应已经被研究证明。现在，研究人员证实了另一个似乎具传染性的东西：锻炼。</p><p><span word="The">The</span> <span word="investigators">investigators</span> <span word="analyzed">analyzed</span> <span word="the">the</span> <span word="running">running</span> <span word="activity">activity</span> <span word="of">of</span> <span word="more">more</span> <span word="than">than</span> <span word="a">a</span> <span word="million">million</span> <span word="individuals">individuals</span> <span word="worldwide">worldwide</span> <span word="who">who</span> <span word="used">used</span> <span word="an">an</span> <span word="exercise">exercise</span> <span word="tracking">tracking</span> <span word="device">device</span> <span word="for">for</span> <span word="five">five</span> <span word="years">years</span>. <span word="And">And</span> <span word="they">they</span> <span word="used">used</span> <span word="weather">weather</span> <span word="patterns">patterns</span> <span word="as">as</span> <span word="a">a</span> <span word="way">way</span> <span word="to">to</span> <span word="randomly">randomly</span> <span word="examine">examine</span> <span word="different">different</span> <span word="parts">parts</span> <span word="of">of</span> <span word="that">that</span> <span word="global">global</span> <span word="network">network</span>.</p><p>研究人员分析了全球100多万人的跑步活动，这些人5年来一直在使用运动追踪装置。研究人员运用天气模式对全球不同地区进行随机检测。</p>
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