Sleep 6 hours a day is enough, mainly in accordance with the individual constitution to judge, if you feel well rested, full of energy during the day, it is enough.
Adults sleep every day is based on the degree of fatigue to decide, if the daytime engaged in a large number of mental activities, physical activities, high-intensity training. More sleep time is needed to restore the body’s functions. Sleep time may require 8 to 9 hours.
If the work is relatively normal or easy, the body’s function is more adequate, generally a day of rest in 7 to 8 hours. In this case, if the quality of sleep is high, it is possible to sleep 6 hours a day.
Insufficient sleep can jeopardize the sympathetic nerve function and aggravate the burden on the heart. If the lack of sleep causes physical discomfort, it is recommended to consult a doctor promptly.