1. to exert oneself too much; to use too much physical or mental effort
Usage: often reflexive

Examples

• Don’t overexert yourself on your first day back at the gym.
• The athlete overexerted during training and pulled a muscle.
• She tends to overexert herself when studying for exams.
• The doctor warned him not to overexert after his surgery.
• Many runners overexert themselves in the final stretch of a marathon.
• He overexerted his back while moving furniture.