noun
treadmill (especially for home use)
Wasei-eigo from 'room runner'. Refers to a treadmill, typically a compact model for home exercise, not a commercial gym machine.
wasei-eigo (Japanese-coined English), from room-runner
毎朝、家のルームランナーで30分走っています。
Every morning, I run for 30 minutes on my home treadmill.
ルームランナーを買
I'm undecided whether to buy a treadmill or go to the gym.