Compared to younger adults, older people are more likely to nap during the day. Some adults 75 to 84 say they get so sleepy they can’t do daily activities. This isn’t a normal part of aging. It might happen because your circadian rhythm is off. But your odds of daytime sleepiness go way up if you have another health problem. That includes ongoing pain, depression, diabetes, heart disease, and sleep apnea. Prostate and bladder issues may cause lots of nighttime bathroom runs, interrupting sleep.