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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.
想鍛煉身體，卻苦于沒有足夠的時間？別再提花半個小時在跑步機上跑步了。在健身自行車上快速沖刺也能燃燒掉同樣多的熱量。一項美國生理學會會議研究如此報道。
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.
研究人員以10名充滿活力的年輕男子為對象展開了實驗。讓他們攝取能量均衡的飲食，以保證攝入和輸出相等的熱量，并維持三天。之后讓每個人在封閉的室內住兩天，同時繼續上述飲食方式。這樣研究人員就能通過監測氧氣和二氧化碳的水平，來計算消耗了多少熱量。
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.
就算他們整天躺著看電視，也要每天燃燒二千二百卡路里。有時讓他們做30秒的自行車沖刺，則會多消耗兩百卡路里熱量。注意，這可不是閑散的運動。他們得盡全力踩踏板，中途還得休息四分鐘。
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：像這樣的沖刺訓練能夠改善身體的血糖循環，有預防糖尿病的可能性。研究人員還指出這也許是另一種燃燒脂肪的方式，可以替代持久的鍛煉。如果你真的不介意燃燒的感覺，那么就去試試吧。
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