Effects of Sleep on Health
When you wake up after a good night of sleep the world seems to be a better place. Six to seven hours of sleep is important not just to keep you happy but also to keep you healthy. Sleep was often ignored in the past in terms of its importance for a healthy life and shrouded by myths.
It was thought to be a passive state but research shows that it is a dynamic process and the brain is active during sleep also. While sleeping the brain responds more to the internal stimuli as compared to the external stimuli.
Sleep has a great influence on our overall mental and physical health.
During sleep growth hormones are released which are instrumental for the growth of children and young adults. During sleep the parts of brain which are responsible for emotional and social interactions are rested.
It is commonly observed that strokes and heart attacks occur more frequently during early morning hours. Inadequate sleep worsens blood pressure and cholesterol problem which increases the risk of heart attacks. The risk of heart attack is reduced by getting seven to nine hours of sleep daily.
Research shows that those who work in night shifts have a greater risk of colon and breast cancer. Being exposed to light during night alters the levels of melatonin. Melatonin helps induce sleep and also fights against cancer.
Sleep deprivation causes the body to get stressed. The brain sends out signals of high alert which results in high blood pressure and production of stress hormones. Stress hormones further make it difficult for you to sleep.
Higher stress hormones in the body raise the level of inflammation which adds to the risk of heart disease, cancer and diabetes.
Though the connection of dreams and sleep is not fully understood but during sleep memory consolidation occurs. When the body rests during sleep the processes the data collected during the day. This time is important for the brain to make analyze events, feelings and memories. Thus adequate sleep helps in improving memory and keeping you alert.
Less sleep is also linked to being overweight. Sleep has an effect on the balance of hormones that regulate appetite.
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