Should be sufficient time to sleep around 7-8 hours, not less or even beyond. A research reveals, the old age who spend more time to sleep, may increase kadar kolestol and lack koleksterol good or HDL. People who sleep less than seven hours each night or sleeping exceed eight hours a possible heart disease. The reason for not yet known. Likewise notes Dr. Julia F. van den Berg and the team researchers from Erasmus Medical Center in Rotterdam journal Psychosomatic Medicine. To investigate whether cholesterol as a cause, the research team then compare the period of sleep and cholesterol levels, including the ratio of total to HDL cholesterol of 768 men and women aged 57-97 years. The researchers using actigraphy to measure the length of time Sleep used as watches, to follow the movement and indicates a more reliable measure of the time someone sleeping. The volunteers are asked to put on the tool is about 5 to seven days for 24 hours. None of the participants allowed to take medicine penurun cholesterol. Overall, Van den Berg and the research team found, the person who more sleep have cholesterol level is higher. To persons aged less than 65 years, spent more time in bed is the main cause. Compared with people aged 70 and above, with the fact bedtime they are more split, so that less time to sleep eventually cause the cholesterol level is lower. The possibility that people spend more time in bed less active, increasing the likelihood of rate increase cholesterol, the researchers note. However, the relationship between sleep time is in pieces with cholesterol Low explained more difficult. Likely because there are factors other diseases, which is hidden. (Reuters/ri)