stiffness

n.僵硬；硬度

As the stiffness and soreness subside, slowly build up your runs. 随着僵硬和酸疼的消退，逐渐加大你的跑量。

These increase the stiffness of the overall suspension system and this is balanced with a softer damping-rebounding ratio. 这些改变增加了悬吊系统整体的硬度，和较软的避振器平衡。