“步幅”用英语怎么说？

她开始加快步子，但他加大了步幅跟着她。She began to walk faster, but he lengthened his stride to keep up with her.四肢长度, 力量和跑步技术可以影响步幅.Limb length, strength and running technique can affect stride length.前步幅带动身体前进, 而不是向上, 这样不容易疲劳.The propels...

“步幅”的拼音为：bù fú...