If you shorten sleep short-term (one night) or long-term (more than two weeks), the ability to retain newly learned information decreases and affects storing and recall of memories.
Sleep is essential for a healthy heart. People who don't sleep enough are at higher risk for cardiovascular disease and coronary heart disease—regardless of age, weight, smoking and exercise habits.
According to the American Heart Association and the U.S. surgeon general, this is how your body starts to recover when you quit smoking:
- In the first 20 minutes: your blood pressure and heart rate recover from the nicotine-induced spikes.
- After 12 hours: the carbon monoxide levels in your blood return to normal.
- After two weeks: your circulation and lung function begin to improve.
- After one to nine months: clear and deeper breathing gradually returns; you have less coughing and shortness of breath; you regain the ability to cough productively instead of hacking, which cleans your lungs and reduce your risk of infection.
- After one year: your risk of coronary heart disease is reduced by 50 percent.
- After 5 years: Your risk of cancer of the mouth, throat, esophagus, and bladder are cut in half. Your risk of cervical cancer and stroke return to normal.
- After 10 years: You are half as likely to die from lung cancer. Your risk of larynx or pancreatic cancer decreases.
- After 15 years: your risk of coronary heart disease is the same as a non-smoker’s.
Science is backing up the correlation between emotions and heart health. In a recent study, people who were happy and positive were less likely to develop heart disease over a 10-year period compared with those who were not so happy.