Exercise

Wanna 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. Researchers studied 10 active young men. For [three:triad] 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:closed] chamber, so researchers could monitor oxygen and CO2 levels a way of exactly calculating calories burned. Just hanging out watching TV, the guys [burned:sunburned] 2,200 calories a day. But they burned 200 more on days when they did five 30-second sprints on an exercise bike. And 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 [sprint:race] 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:tolerance] exercise for burning calories. That is if you don't mind really feeling the burn.