Exhaustion is an act of energy level that is not being normal or what is suppose to be in. Exhaustion comes in many different forms- the physical form, mental form, spiritual form, and emotional form. But the following factors will be on the physical form and partly mental form. It has many different names too such as lethargic and fatigue.
One of the factors of exhaustion comes from malnutrition. That means, a person does not have the intake nutrition that one is suppose to have. If the body is weak, thus, this leads to a sick body and tiredness. So eat a well balanced diet to avoid yourself from this factor.
Another factor would be lack of sleep. When a person does not have enough sleep daily and in the long run, then the body would be tired and the thus, will lead to energy deficiency. Lack of sleep will also make the body week and will disrupt the activity that a person is performing as they did not do their very best in taking care of their own condition and thus effect their performance.
Stress also lead to this act as it uses lots of brain cells to think and lead to the person's mental drainage of energy. Stress occurs from the working and studying fields of life. Normally, a person wants to solve an issue or work or assignment and thus involves stress to do it. Doing last minute work also creates stress at an even higher level. Worrying and caring about someone also cause stress. So sometimes, it's a good factor and most of the times bad, cause people who have high blood pressure cannot take it or else~Heart Attack!
Lack of/ No/ Inconsistent Exercise also contributes to exhaustion. Exercise is at paramount important as it heats up the body to have good blood flow in the body and this makes the person feels fresh! Exercise could be as simple as walking, jogging and the extreme, gym and stuff!
In conclusion, if you wanna have a healthy body and prevent yourself from exhaustion, take care of yourself by having a well balanced intake of nutritional stuff, get sufficient sleep, don't procrastinate and exercise regularly to go on a life full of happiness. After all, Einstein ever said that smart people solves problem but geniuses prevents them. cheers~