In a meta-study, researchers looked at data of more than a million persons and concluded that too little as well as too much sleep is not optimal for the heart, but that a range of 6 to 8 hours of sleep per night is optimal.
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| In a meta-study, researchers looked at data of more than a million persons and concluded that too little as well as too much sleep is not optimal for the heart, but that a range of 6 to 8 hours of sleep per night is optimal. |