noun
brain training; brain workout
Abbreviation of 脳力トレーニング; refers to mental exercises, puzzles, or games designed to stimulate cognitive function. Common in health and gaming contexts.
毎朝、スマホで脳トレのアプリをやっている。
Every morning I do brain training apps on my smartphone.
このパズルはいい脳トレになる。
This puzzle is a good brain workout.