Proper Sleep Time Reduces Heart Disease Risk Merxwire 09 May 2021, 18:13 GMT+10 How much time do you spend sleeping every day? Some people sleep only 3 to 4 hours a night, and some sleep 6 to 7 hours a night. Research shows that the latter has better cardiovascular health data. Detroit, MI (Merxwire) - According to a study by Henry Ford Hospital in the United States, sleeping too long or too short may increase the risk of heart disease. Researchers have found that sleep can play a role in cardiovascular risk in the same way as diet, smoking, or exercise. It is recommended that a suitable sleep time is 6 to 7 hours.