Perceived exertion during walking and running???II

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Abstract
It was hypothesized that perceptions of exertion while running would be greater than for walking at velocities lower than approximately 4.0 mph. The reverse was hypothesized at velocities higher than approximately 4.0 mph. Twenty male university students served as subjects. Utilizing a motor-driven treadmill, subjects walked and ran at each of four randomly presented velocities, i.e., 2.5, 3.5, 4.5 and 5.5 mph. Heart rate and perceived exertion were recorded during the last 30 seconds of each 3 minute velocity trial. Heart rates while walking were found to be less than for running at velocities less than 4.0 mph. The curves intersected at 4.92 mph and reversed so that walking heart rates were higher following this point. Perceived exertion displayed a similar pattern except the curves intersected at a significantly lower velocity, i.e., 4.31 mph. Although perceived exertion generally follows heart rate responses, local muscular discomfort at higher walking velocities is proposed as the factor responsible for the earlier perceptual intersection.

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