It didn't look at shoe heel height, it looked at anatomical heel length, the distance from the back of your ankle joint to the insertion of the Achilles tendon.
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他们还发现,跟腱拉伸时所产生的“杠杆长度”也有差别,短跑运动员的“杠杆长度”要短四分之一。
The length of the lever of bone that the Achilles tendon pulls on also differed, being a quarter shorter in sprinters.