1.【答案】B。解析：细节题。根据real problem定位到文章第四段“Of course, physiologists are not the problem. The problem, according to Duane, is that everybody in the fitness industry uses basic science and then twists the results to come up with something that sounds like a scientific recommendation for whatever they’re selling.”从这句话可知，真正的问题在于健身行业的每个人都使用基础科学，然后扭曲结果，使得他们想推销的东西听起来像一个科学建议。所以B符合题意。
2.【答案】A。解析：细节题。定位到文章第一段“If you like to exercise, you may have learned that high-intensity interval training is all the rage at the moment. There are also seven-minute and 20-minute workouts that promise results in just a short period of time.”，可知，high-intensity interval training盛行是因为它承诺人们在短时间内就可以取得健身成果。故A符合题意。
3.【答案】D。解析：词义猜测题。根据定位句Daniel Duane, a Men’s journal editor, recently wrote in The New York Times that there are in fact no cutting-edge scientific studies on workout routines. 可知Daniel Duane最近在一本书中写到，事实上，对于锻炼方式还没有____科研研究。根据“recently”这个词，再结合语境，可推断出应该是没有“最前沿的科学研究”。cutting-edge意为“先进的，前沿的”;well-founded理由充足的;general-accepted普遍接受的;authoritative权威的;most advanced最先进的。故D. most advanced与cutting-edge意思一致，符合题意，答案选D。
4.【答案】A。解析：细节题。最后一段中Always push yourself to your limits对应B项。倒数第二段中If you force it to do something a little harder than it has done recently, it will respond.对应C项。倒数第二段中All athletic training uses this principle through small, steady increases in weight, speed ,or distance.对应D项。本文讲的是跟运动强度相关的话题，与兴趣无关，故选A。
5.【答案】B。解析：主旨题。本文首先写到高强度间歇训练很受欢迎，接着写到其所存在的问题，最后又提醒训练者注意事项。所以本文属于健身指南，故选B。
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