A lack of sleep at night can irritate you the next day. And over time, thinking about sleep can mess up more than just your morning mood. Studies show getting quality sleep on a regular basis can help improve all sorts of issues, from your blood sugar to your workouts. Here is why you should give your body the sleep it needs. Sharper Brain. You will probably have trouble holding onto and recalling details when you are running low on sleep. That is because sleep plays a big part in both learning and memory. Without enough sleep, it is tough to focus and take in new information. Your brain also does not have enough time to properly store memories so you can recollect them later. Sleep lets your brain catch up so you are ready for the next task. Mood Boost. Another thing that your brain does while you sleep is process your emotions. Your mind needs this time to recognize and react the right way. When you cut that short, you tend to have more negative emotional reactions and fewer positive ones. Chronic lack of sleep can also increase the chance of having a mood disorder. One large study showed that when you have insomnia, you are five times more likely to develop depression and your odds of anxiety or panic disorders are even greater. Refreshing sleep helps you hit the reset button on a bad day, improve your outlook on life, and be better person to meet challenges. Healthier Heart. When you sleep your blood pressure goes down and gives your heart and blood vessels a bit of a rest. The less sleep you get, the longer your blood pressure stays up during a hour cycle. High blood pressure can lead to heart disease, including stroke. Athletic Achievement.