Sleep disorders are increasing in younger people also. But as you age sleep patterns beyond "the norm" increase all across that population spectrum. The lack of healthful sleep should not be underestimated in its negative effects regardless of age. But older people sleep less for many reasons including the biologic effects of just aging. Even very healthy older people begin to have less effective healthfull sleep as the years go on. So the point is to find ways to recover good sleep. Stay healthy. Exercise. Avoid eating late at night. Eliminate all light from the sleep environment, flashing toothbrushes, clocks, night lights, street lights, phones, etc. supplements such as melatonin may help. Yoga, meditation also. Speak to your physician about your sleep patterns especially if you are on any medication as they may have an importance. I've studied this subject quite a bit but there is not much to be said beyond what you can find in medical literature on the internet. Some people that delve into this extensively also utilize various monitoring devices and apps that even interface with IPhones to help better the quality of their sleep. But I don't pursue that approach any longer and just stick to the principles. Bottom line is good,quality sleep is essential to good health and longevity. Its importance is far underrated. A vital topic. Good for you bringing it up!