Want to exercise, but don't have enough time? Forget slogging half an hour on the treadmill. You can burn the same number of calories with a few quick sprints on an exercise bike. So says a study presented at a meeting of the American Physiological Society.
想锻炼身体，却苦于没有足够的时间？别再提花半个小时在跑步机上跑步了 。在健身自行车上快速冲刺也能燃烧掉同样多的热量 。一项美国生理学会会议研究如此报道 。
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 chamber, so researchers could monitor oxygen and CO2 levels—a way of exactly calculating calories burned.
研究人员以10名充满活力的年轻男子为对象展开了实验 。让他们摄取能量均衡的饮食，以保证摄入和输出相等的热量，并维持三天 。之后让每个人在封闭的室内住两天，同时继续上述饮食方式 。这样研究人员就能通过监测氧气和二氧化碳的水平，来计算消耗了多少热量 。
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.
就算他们整天躺着看电视，也要每天燃烧二千二百卡路里 。有时让他们做30秒的自行车冲刺，则会多消耗两百卡路里热量 。注意，这可不是闲散的运动 。他们得尽全力踩踏板，中途还得休息四分钟 。
Previous studies show that sprint training like this improves the body's response to blood sugar, possibly helping to stave off diabetes. 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.
以前的研究表明：像这样的冲刺训练能够改善身体的血糖循环，有预防糖尿病的可能性 。研究人员还指出这也许是另一种燃烧脂肪的方式，可以替代持久的锻炼 。如果你真的不介意燃烧的感觉，那么就去试试吧 。