Physiological comparison of three types of ergometry

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Abstract
A physiological comparison of cycling, cranking and walking has been made, using in all experiments the same subjects and methods. In cycling and cranking energy expenditure increases with work load in a rectilinear way, the energy expenditures being always higher in cranking. In treadmill walking energy expenditure per kilogram of body weight rises curvilinearly both with increasing speed and grade. In cycling, cranking and walking there are nearly the same relations between heart rate and metabolism. Ventilation in cranking always exceeds that in walking and cycling at the same level of oxygen consumption. The curve of ventilation versus oxygen consumption shows a steeper rise in cranking. In level and grade walking ventilation increases curvilinearly with oxygen consumption. Submitted on September 17, 1959

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