The running shoes become the mainstream in the market, whatever exercising or not, having the running shoes seems to be a basic necessary. And we must notice that the cushioning of the running shoes were related with the occurring of lower extremity injury. A healthy 29-years-old male participating this study (172 cm of height and 67 kg of weight) and a metronome was used to control the proper walking velocity. One force plate (sampling rate: 1000Hz) was used to gather maximum reaction force (MRF) and maximum loading rate (MLR). In the procedure, the subject wore the different structure of running shoes respectively and down stepped by the right feet (the height of step: 10cm, 20cm, 30cm). In each shoes and height, six complete data must be gathered. One-Way ANOVA analysis was used to complete the difference of all data. The results were as follow: 1.The MRF of the three pairs of running shoes of different structure weren't different significantly (p > .05). 2.The MLR of the three pairs of running shoes of different structure weren't different significantly (p > .05).