淫手好鹹的魯芬Fans
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原帖由 little_lam 於 2007-7-24 01:47 PM 發表 when we run at a more or less constant pacefrequency of 180 paces/min, heel strike should allow you to use lessforce to achieve the same strike length (or a longer strike length ifthe same force), as heel strike gives a long strike length by nature.Less force in a marathon is important.
花落人靜了時別~