7~ 9 hours of sleep for 26~60 year old women is health According to a survey of Australians insititution revealed that 7~9 hours of sleep for 26~ 60 year old women is healthy to improve your mood and ability to preform daily tasks. People constantly use smartphone would inhibit our bodies' ability to get high quality level of sleep. Therefore, It should turn off all the eletronic appliances 1 hour in advance before we get to bed. Instead of it, we would brush teeth, have shower, or read bedtime book. In additions, the survey presented 70% of female worker feel their everyday preformance is affected by lact of sleep. I am one of this. My average sleep time is 6 hours per day which calculated by my wearable appliance. I suffer from insomnia usually~~ I think it's a little bit mental problem. I am afraid of insomnia, so I force me go to bed late until feel sleepy.whereas, I feel sleepy at 1~ 2 o'clock . I generally have short time snooze or suffer from insomnia. How pity I am. The only way to make me sleepy quickly is to watch documentaries. But I always forget it when I should go to bed. When I wake up in morning with tired, I always regret and make a dicision to go to bed today. It's a bad circle taking place everyday.