美国科学60秒 SSS 2012-10-23_在线英语听力室_免费在线英语听力学习网站

(单词翻译:双击或拖选)

Want to exercise, but don't have enough time? Forget slogging half an hour on the treadmill¹. You can burn the same number of calories with a few quick sprints³ on an exercise bike. So says a study presented at a meeting of the American Physiological⁴ Society.

Researchers studied 10 active young men. For three days, the men ate an energy-balanced diet--meaning calories in matched calories out. Then, still on the diet, each guy spent two days living in a sealed chamber⁵, so researchers could monitor oxygen and CO2 levels—a way of exactly calculating calories burned.

Just hanging out watching TV, the guys burned 2,200 calories a day. But they burned 200 more on days when they did five 30-second sprints on an exercise bike. Now, these were not laid-back efforts. The guys pedaled as hard as they could, and had to take four-minute rest breaks in between.

Previous studies show that sprint² training like this improves the body's response to blood sugar, possibly helping⁶ to stave off diabetes⁷. And the researchers say it may be an alternative to endurance exercise for burning calories. That is, if you don't mind really feeling the burn.

点击

收听单词发音

1 treadmill
n.踏车；单调的工作
参考例句：
The treadmill has a heart rate monitor.跑步机上有个脉搏监视器。 Drugs remove man from the treadmill of routine.药物可以使人摆脱日常单调的工作带来的疲劳。

2 sprint
n.短距离赛跑；vi. 奋力而跑，冲刺；vt.全速跑过
参考例句：
He put on a sprint to catch the bus.他全速奔跑以赶上公共汽车。 The runner seemed to be rallied for a final sprint.这名赛跑者似乎在振作精神作最后的冲刺。

3 sprints
n.短距离的全速奔跑( sprint的名词复数 )v.短距离疾跑( sprint的第三人称单数 )
参考例句：
You can run sprints only so long before you're out of breath. 你死命地跑，只能跑那么一段时间，到了喘不上气的时候，只好停下来。来自辞典例句 The cheetah finds the open grasslands ideal footing for its lightning-quick sprints. 非洲猎豹把开阔的草原作为它们闪电猎食的理想处所。来自互联网

4 physiological
adj.生理学的，生理学上的
参考例句：
He bought a physiological book.他买了一本生理学方面的书。 Every individual has a physiological requirement for each nutrient.每个人对每种营养成分都有一种生理上的需要。

5 chamber
n.房间，寝室；会议厅；议院；会所
参考例句：
For many,the dentist's surgery remains a torture chamber.对许多人来说，牙医的治疗室一直是间受刑室。 The chamber was ablaze with light.会议厅里灯火辉煌。

6 helping
n.食物的一份&adj.帮助人的，辅助的
参考例句：
The poor children regularly pony up for a second helping of my hamburger. 那些可怜的孩子们总是要求我把我的汉堡包再给他们一份。 By doing this, they may at times be helping to restore competition. 这样一来, 他在某些时候,有助于竞争的加强。

7 diabetes
n.糖尿病
参考例句：
In case of diabetes, physicians advise against the use of sugar.对于糖尿病患者，医生告诫他们不要吃糖。 Diabetes is caused by a fault in the insulin production of the body.糖尿病是由体內胰岛素分泌失调引起的。