Burnout

Definition: Burnout is the state of persistent physical, mental or emotional exhaustion caused by long-term stress, typically as a result of excessive workplace and/or personal responsibilities.
Burnout is not a simple consequence of making long hours. The cynicism, depression, and lethargy of burnout can occur when you're not in control of how you carry out your job, when you're working toward goals that don't resonate with you, and when you lack social support.
See also: Work-life Balance.

More on burnout. More on behavior and motivation: Attribution Theory, Employee Commitment, Employee Involvement, Employee Motivation, ERG Theory, more...