noun
wall bars; stall bars
A piece of gymnastic equipment consisting of a ladder-like frame attached to a wall, used for stretching and exercises.
体育館の肋木でストレッチをする。
I stretch using the wall bars in the gymnasium.
Compound of 肋 (roku, 'rib') and 木 (boku, 'wood'), referring to the rib-like wooden rungs of the apparatus.