Exert
The word exert means to apply mental or physical effort to bring about certain desired changes in one’s immediate or extended environment. It can be understood as an genuine or deliberate effort. A behaviour can be repeated intentionally for number of reasons. An individual repeats a behaviour quite often when he or she wants to convey something to the observer, when the behaviour is important or necessary. When someone exerts oneself, they generally involves extreme effort that is put in by an individual to achieve a goal. However, escalation of commitment might also result due to over exertion that is given in by an individual. Inspite of it, exerting effort is necessary to bring about the desired change.