美国科学60秒 SSS 2012-10-23

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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.

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