Ground reaction force and its feeling during walk in middle and elderly :focused on walking speed and carrying weight

测量了不同条件下步行时的地面反力，包括水平步行和楼梯条件。受试者为健康学生。通过使用足部扫描系统（Nitta Co. Ltd）测量足部压力。用足部扫描系统测量连续行走过程中足底压力的分布及触地过程中足底压力的峰值，并对三种不同情况下的足底压力分布及峰值进行比较。步行过程中的足部压力值被报告为小于体重的150%，这将不能够覆盖足够的强度或值以保持人体骨骼作为健康状态。在水平步行的情况下，在自由步行过程中需要超过6 Km/h的速度来获得体重压力的150%。在4Km/h自由行走的情况下，负重超过体重的10%时产生150%的应力值，在楼梯条件下，获得足够的压力来覆盖超过150%的应力。在负重10%体重的情况下，获得超过200%的应力。建议考虑楼梯条件，以便更好地行走，获得足够的骨应力。

The ground reaction force during walk on different condition was measured including level walk and stairway condition. The subjects were healthy students. The foot pressure was measured by using a foot scanning system (Nitta Co. Ltd). The distribution of the foot pressure and the peak value of it during contact with the ground during walk continuously by using the foot scanning systemThe foot pressure was compared with each result of the three different conditions. The value of foot pressure during walk was reported as less than 150% of body weight which will not be able to cover the enough strength or value for keep a the human bone as a healthy condition.In case of the level walking, the speed was needed more than 6Km/h for getting the 150 % of body weight pressure during free walk. Even a case of 4Km/h of free walking, 150% of value was produced carrying with the weight of more than 10% of body weight.Incase of stairway condition, the enough pressure was obtained for cover the more than 150% of stress. More than 200% of stress was obtained in case of carrying 10% of weight of the body weight. It will be recommended that, the stairway condition should be considered for a better walking of getting an enough bone stress.