Myth 3 : Your body adjusts quickly to different sleep schedules
Your biological clock makes you most alert during the daytime and most drowsy at night. Thus, even if you work the night shift, you will naturally feel sleepy when night time comes. Most people can reset their biological clock, but only by appropriately timed cues—and even then, by 1–2 hours per day at best. Consequently, it can take more than a week to adjust to a dramatically altered sleep/wake cycle, such as you encounter when travelling across several time zones or switching from working the day shift to the night shift.
Myth 4 : People need less sleep as they get older
Older people don’t need less sleep, but they often get less sleep or find their sleep less refreshing. That’s because as people age, they spend less time in the deep, restful stages of sleep and are more easily awakened. Older people are also more likely to have insomnia or other medical conditions that disrupt their sleep.
To Be Continued ....
Source : forum.abfun.net
