發表於 2010-1-24 16:31:51
原帖由 hksis8888 於 2010-1-24 10:50 發表
多謝 ching , 我要求唔高 , 平就得 , 唔係電子野 , 我唔擔心膠有問題 .
the protective effect of running shoes is resulted from the design and materials.
If the materials are aged (e.g. "rubber"), then the flexibility and the shock absorptive effect will be reduced significantly.
That's why second-hand shoe cannot offer good protection.