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【Share】Defining "moderate-intensity" exercise
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Engage in moderate-intensity physical activity for a minimum of 150 minutes each week. That's the current national recommendation on physical activity. It's easy enough to understand, except for the "moderate intensity" part. Does that mean walking? So-called "brisk" walking? Jogging? San Diego State University researcher Simon Marshall has come up with a practical rule of thumb for figuring out "moderate intensity" as it applies to walking: it's akin to taking at least 100 steps per minute. To get to this definition, Marshall and his colleagues recruited 97 women and men. Each walked on a treadmill four times at four different speeds—from 2.4 miles per hour to 4.1—while a machine measured the amount of energy he or she was expending. The volunteers also wore pedometers to count their steps. Complex calculations later, the researchers determined that walking at a speed of at least 100 steps per minute fulfilled the lower limit of moderate-intensity exercise (American Journal of Preventive Medicine). |
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witch_girl
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8楼2011-01-05 23:05:44
打瞌睡的糖
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2楼2011-01-05 12:02:07
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Is it moderate-intensity? 
4楼2011-01-05 15:30:29
witch_girl
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6楼2011-01-05 22:50:31
