“踏车”常见的英文表达是 “treadmill”，它既可以指健身房里供人跑步或行走锻炼的跑步机（a kind of exercise machine for running or walking in place），也有“（旧时）脚踏驱动的纺车、织布机等”（a kind of old-fashioned machine powered by foot pedals for spinning, weaving, etc. ）的含义。不过在现代语境中，更多时候指健身跑步机。
例句：
He runs on the treadmill for thirty minutes every day.（他每天在跑步机上跑三十分钟。）
In the old workshop, there were several treadmills for spinning.（在那个旧车间里，有几台脚踏驱动的纺车 。）