Sleep is part of our daily routine, where our body enters a condition which our nervous system is inactive, eyes are closed, postural muscles are relaxed and our consciousness is temporarily disabled. However, in recent years where new technologies that contain more advanced software which allows human to become more obese with technology. These new technologies cause humans to have fewer hours of sleep comparing in the past. A study has shown that in 1998, where technologies weren’t as developed as the present, 88% of the human on the Earth tend to have more than 6 hours per day. However, after new technologies were developed along with the advanced software, only 71% of the human on the Earth still sleeps more than 6 hours per day. This is a significant decline over the past 11 years where it went from 88% to 71%. However, you might ask why is sleep so important to the human being? Sleep plays an important role in each human’s life, as it takes care of both physical and mental part of the human body. As an athlete myself, I was clearly able to understand the huge difference between a sufficient amount of sleeping and an insufficient amount of sleep. When it comes to athlete, sleep becomes a crucial part for the athletes, especially when they are expected to perform at such high level continuously. Sports relies heavily on both physical and mental parts in the human’s body, and with sleep deprivation, it can damage both of the physical and mental of our body. During a game or training, athletes are expected to be concentrated at all time, where they have to react under highly intense pressure. With sleep deprivation, it has the capability of reducing the arousal levels and the cognitive processes of the human, causing the athlete to be easily distracted . The arousal level involves many different neural systems in the neurotransmitters when the systems are in action, it becomes sensitive and responds to an incoming signal. The arousal in our body are responsible for human alertness, attention and information processing, however when the level of arousal in our body decreases, it causes human to become less alert, where they are less aware of the surrounding and becomes slower at processing information. The cognitive processes involve many different complex mental activities such as thinking, imagining or information processing . An athlete relies heavily on his or her’s cognitive functions since athletes are required to have good decision making, an accurate perception in order to outstand their opponent on the court. With both of arousal level and cognitive processes being reduced, this could lead to poor attention and concentration where the athlete will more likely to make a mistake during such high pressured situation. For an example, in a football game, the goalkeeper plays a significant role as the athlete has the responsibility to prevent the opponent from scoring. However, in the game of football, the number of goals lies under double-digit where every goal is extremely crucial. The nature of this game creates a high intense pressure for the goalkeeper where it requires the goalkeeper to be fully concentrated at all time. However, when it comes to a situation where the opponent’s striker is heading towards the goal. In this situation, there are two decisions waiting to be made by the goalkeeper; either stay at the goal and let the striker comes to you, or charge towards the striker. Normally, it would take the goalkeeper 0.7 seconds to decide which choice to make. However, with the lack of sleep, the goalkeeper’s reaction speed will more likely decrease by 2.4 percent . With that small gap of hesitation during the decision making, it could really affect the outcome of the decision where it determines if the goalkeeper can stop the shot or not.