폴 사용과 걷는 지속시간이 내리막 걷기에 미치는 효과

Abstract

The purpose of this study was to investigate 45minutes down-hill walking depending on hiking poles and steady walking time. Seven healthy men volunteered for this experiment. Each of them performed down-hill walking with hiking poles-using and without poles at speed of 3.5km/h for 45 minutes on a treadmill. The treadmill was set 25% down-hill inclination. Kinematic data collected in 60Hz were recorded and analyzed by using 2D motion capture system to measure step time and step length so on. Rating of perceived exertion(RPE) was recorded and analyzed by 15minutes interval. And the lower extremity 4 muscles activity including rectus femoris, tibialis anterior, gastrocnemius, biceps femoris was simultaneously recorded in 1500Hz and assessed by using EMG. The statistical analysis was two-way ANOVA with repeated measures to compare effects of hiking poles and steady walking time. The level of statistical significance for all tests was .05. The results of this study were following: Step time was showed statistically different according to pole conditions. That is, the case of poles-using was longer than without poles in step time(P.05). Also, step length was showed statistically different between two conditions. Step length about trials with poles was longer than trials without poles(P.05). In the RPE, steady walking time was stronger factor than pole condition. That is, RPE was increased significantly as times up 45minutes(P.05). In the muscle activity, integrated EMG(IEMG) about four muscles was decreased some with poles than without poles. And IEMG about four muscles was increased significantly as times up(P.01). These results can be interpreted that using of hiking poles can be increased step time and step length. In addition to, RPE can be increased as steady walking times up. Finally, four muscles activity that is required on down-hill walking is increased relatively by walking times up.