Not getting enough sleep can also have serious consequences for your physical health. Research has shown that chronic sleep deprivation can weaken the immune system, making you more susceptible to illness. In fact, people who don't get enough sleep are more likely to catch colds, flu, and other infectious diseases. Lack of sleep can also have a negative impact on your cardiovascular health. Studies have shown that people who don't get enough sleep are at a higher risk of developing hypertension, heart disease, and strokes. This is because sleep deprivation can lead to an increase in stress hormones, which can in turn raise blood pressure and contribute to the development of cardiovascular disease. In addition to these serious health risks, not getting enough sleep can also have a negative impact on your weight. Studies have shown that people who don't get enough sleep are more likely to be overweight or obese.