Optimal Sleep Duration Discovered
Recent studies show that the need for sleep is not fixed and varies depending on age, health condition, and lifestyle. Although the appropriate range for most adults is between 7 and 9 hours per day, research indicates that sleeping between 5 and 7 hours at night can be sufficient in some communities that rely on hunting and live with limited exposure to artificial lighting. Additionally, studies have demonstrated that both very short and very long sleep durations are associated with an increased risk of heart disease and stroke. Modern recommendations emphasize the importance of balancing sleep duration with the timing and continuity of sleep to achieve alertness and complete rest during the day.
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