单选题
Group Exercise" Boosts Happiness"

Exercising together appears to increase the level of the feel - good endorphin hormones naturally released during physical exertion, a study suggests.
A team from Oxford University carried out tests on 12 rowers after a vigorous workout in a virtual boat.
Those who trained alone withstood less pain—a key measure of endorphins—than those who exercised together.
Row your boat
It has long been known that phyrsical exertion releases endorphins and that these are responsible for the sometimes euphoric sensations experienced after exercising.
They have a protective effect against pain.
But researchers from Oxford University's Institute of Cognitive and Evolutionary Anthropology found this response was beightened by the synergistic effect of rowing together.
After 45 minutes of either rowing separately or in a team of six, the researchers measured their pain threshold by how long they could tolerate an inflated blood pressure cuff on the arm.
Exercise increased both groups' ability to tolerate pain, but the difference was significantly more pronounced among the team rowers.
This, they said, was a measure of an increased endorphin release.
As well as potentially improving performance in sport, the researchers speculated that this endorphin release may be the mechanism that underpins the sense of communal belonging that emerges from activities such as religious rituals, dancing or laughing.
"The results suggest that endorphin release is significantly greater in group than in individual training even when power output, or physical exertion, remains constant," said lead author Emma Cohen,
"The exact features of group activity that generate this effect are unknown, but this study contributes to a growing body of evidence suggesting that synchronised, coordinated physical activity may be responsible. "
Carole Seheuh, a sport and exercise psychologist from the British Psychological Society, said "The findings were entirely credible. Rowing is a sport which requires real team work and endorphins could well foster that process. But more generally we know from experience that exercising in groups is good for people, it's motivational, it's social. Groups sessions really do work. /

单选题 What is NOT right about endorphin?
【正确答案】 A
【答案解析】endorphin hormones naturally released during physical exertion. Those who trained alone withstood less pain—a key measure of endorphins, It has long been known that physical exertion releases endorphins and that these are responsible for the sometimes euphoric sensations experienced, They have a protective effect against pain．(在体力运动中，人体可以自然释放安多芬，抗疼性是测量安多芬的一个重要标准，人们根早就知道体力运动能刺激安多芬的产生，这也和运动后产生的快感有关，也能有效地抵抗疼痛感)。选项A认为安多芬是不能被测量的，是不符合文意的，故选择A。
单选题 What is right about the experiment?
【正确答案】 C
【答案解析】定位到文章原句A team from Oxford University carried out tests on 12 rowers, After 45 minutes of either rowing separately or in a team of six，(有12名测试者。或选择独自训练，或选择参加6人小组)，可见选项C认为参加者必须至少运动45分钟，是不合题意的。故选择C。
单选题 How did the research to find out the change of pain tolerance ability?
【正确答案】 B
【答案解析】定位到文章原句the researchers measured their pain threshold by how long they could tolerate an inflated blood pressure cuff on the arm．(研究人员通过测量他们承受充气的血压计的时间来测量其痛阈值)。可见选项B是合文意的，故选择B。
单选题 Which is right?
【正确答案】 D
【答案解析】定位到文章原句The results suggest that endorphin release is significantly greater in group than in individual training…the sense of communal belonging that emerges from activities such as religious rituals, Rowing is a sport which requires real team work．(结果表明，参加集体锻炼的人的安多芬的释放明显大于单独培训的人，宗教活动对集体归属感的产生的积极作用。赛艇是一项需要真正的团队工作的运动)。可见选项D是不合文意的，故选择D。
单选题 What is Emma Cohen's ideas?
【正确答案】 D
【答案解析】定位到文章原旬lead author Emma Cohen said, "but this study contributes to a growing body of evidence suggesting that synchronised．coordinated physical activity may be responsible．”(已存在大量关于同步协调的体力运动可能对安多芬的增加有帮助的证据，这项研究又增加了一个证据)。可见选项D是Emma的意见，而选项ABC都是Carole的意见，故选择D。