Abstract
This study aimed to measure stature changes during and after walking and running at a preferred transition speed (PTS) and the recovery period, and to examine differences caused by loads imposed on the spinal column. Seven males and three females aged 22-41 years took part in this study. Subjects The subjects underwent 15 minutes of walking or running on a treadmill in a random order. Stature changes were measured during each exercise at intervals of 5 minutes and after a 20 minute standing recovery period within units of 0.01 mm. Two- way ANOVA revealed that both main factors, gait (F = 5.250, P < 0.05) and elapsed time (F = 14.409, P < 0.05), had a significant effect on stature. In the post hoc test, stature shrank with time and its loss was found to be greater in running than in walking, but recovered after both exercises. In conclusion, the spinal load increases with time during both walking and running at PTS, but is greater in running than in walking. After both exercises, spinal shrinkage shows a similar recovery process and recovers faster in walking to its pre-exercise level.
Highlights
Walking and running are fundamental modes in human locomotion
The preferred transition speed (PTS) between walking and running has been studied from various viewpoints and it has been found that the energy cost of locomotion would not be the trigger to determine its speed [1]
The energy consumed by running that exceeds walking is at a faster level than PTS [1]
Summary
The preferred transition speed (PTS) between walking and running has been studied from various viewpoints and it has been found that the energy cost of locomotion would not be the trigger to determine its speed [1]. The energy consumed by running that exceeds walking is at a faster level than PTS [1]. The PTS is a faster speed than walking, but slower one than running. PTS may be an exercise intensity that corresponds to an aerobic training level in healthy adults. Walking has merits such as lower intensity and low risks to the cardiovascular system. These are undoubtedly reasons why walking is widely recommended as a mode of exercise. From the prevention of back injuries, many researchers have studied an exact change of stature to evaluate the spinal load imposed by various tasks or ex-
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