D'exercer (en. To exercise)

/dɛɡ.zɛʁ.se/

Slang Meanings

To train intensely in something.
He goes all out to practice basketball.
Il se met à fond pour s'exercer au basketball.
To make efforts to improve one's skills.
She practices hard for her dance competition.
Elle s'exerce dur pour son concours de danse.