In this study, we tried to clarify influences to cardio-vascular functions, mechanical and mental stresses of body, during walking exercise on the sawdust (so called ogakuzu; O) surface road comparing with the concrete (C) one. So we measured blood pressure, heart rate, triaxial accelerogram, salivary amylase and RPE before, during and after walking on each surface one. To eliminate such as environmental factors (wind etc.) in the case of outdoor, the experiment was carried out in a domed facility. Ten voluntary male students corporated as the subjects whose age were 20~22yrs. Systolic blood pressure (SBP) and heart rate (HR) increased, and diastolic blood pressure (DBP) decreased, they were kept a certain level during walking after a couple of minutes when the exercise started on the both trials. But they were not statistically significant between on the O and the C surface ones. SBP indicated lower than that in the previous study, though HR was about the same. The deviation, power spectral density and Lissajous orbit of the accelerograms were not so keen to distinguish the difference of shock reduction between the two surface roads. RPE didn't show typically, it might have influenced by individual characteristics how to feel stress. Salivary amylase increased after walking only on the O. According to these results, we didn't have enough data to explain the advantage on the sawdust walking. More additional data would need to be taken about the shock reduction against a body, especially lower limbs, on the sawdust road.
