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This was the conclusion of an author of Runner's World magazine did a comparison between these two cardio activity. By using a heart rate monitor, he ran on a treadmill in 6 different speeds. Then after a pause, he repeated it but on foot.
He found that when her footsteps exceed 5 miles per hour (mph), walking became more difficult than running. This was indicated by heart rate (heart rate).
It is undeniable, running over 5 mph is very difficult, but if the condition can be accepted by our joints, do not need prestige if you can not offset the running speed of your colleague.
Running at high speed will force the body to move in a manner inconsistent with the supposed movement thereby increasing the internal friction.
Indeed, running burns more calories. But walking is also a good alternative to burning calories. The point is to do something challenging without making body fatigue.
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