Runners have long debated the difference between training on a treadmill and training on solid ground. 鈥淏elt turnover鈥� is commonly cited as a factor that helps to move your foot backwards and thereby makes running on a treadmill easier than running on the road. At constant velocity, is this a real effect? If so, wouldn鈥檛 it be felt on any 鈥渕oving鈥� surface you walk on, such as a train or plane 鈥� or even Earth?
Dan Bruestle, North York, Ontario, Canada
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