There is good news for people who think they do not have time to exercise.
A group of researchers from a university in Canada recently published a study that says short bursts of high-intensity exercise are good for you.
In fact, this kind of exercise is just as good as spending up to an hour riding a bike or running steadily.
The research team followed 27 men who were not very active for 12 weeks. They divided the men into three groups. One group did short, intense workouts on a bicycle three times a week. Another group rode a bicycle for about 50 minutes, three times a week. A third group did nothing.
The researchers found something they did not expect. The group that exercised for only 10 minutes each session was just as healthy after 12 weeks as the group that exercised for 50 minutes each session.
That is because of the way the researchers organized the workouts.
Each group started with a two-minute warm-up and finished with a three-minute cool-down. But in-between, the high-intensity group sprinted for 20 seconds, followed by a two-minute recovery period. They did three sprints for a total of 10 minutes of exercise. This kind of exercise is known as interval training.
The lead author of the study says interval training is both time efficient and effective.
I'm Dan Friedell.
1.burst n.爆炸; 爆裂; 爆发
Her burst of exuberance and her brightness overwhelmed me.
His daughter was very active and noisy in the mornings.
3.intense adj.热情的，强烈的，紧张的; 热烈的
The military on both sides are involved in intense activity.
4.workout n.锻炼; 练习
She does a 20-minute workout every morning.
He returned from a lunchtime drinking session with his business cronies.
Sergeant Horne sprinted to the car.
7.interval n.间隔; 幕间休息
The ferry service has restarted after an interval of 12 years.
该研究团队追踪记录了27名不那么积极运动的男子连续12周的时间。他们将这些男子分成几组 。一组男子每周三次骑自行车进行短暂的高强度运动 。另外一组每周三次骑自行车，每次50分钟 。第三组什么运动都不做 。
每一组都从两分钟的热身运动开始，以三分钟的放松活动结束。但是在这期间，高强度运动的一组短跑冲刺20秒钟，然后进行两分钟的恢复 。他们在十分钟的运动时间内进行了三次冲刺 。这种锻炼方式被称为间歇训练 。