Yes. The amount of sleep needed is largely influenced by age. As we grow older, not only do we require less hours of sleep, but also less deep sleep. In fact, we need half as much deep sleep in our 60s as we did in our 20s. Also, the number of awakenings during the night increases as we age. If you find yourself waking too early and feeling tired by late afternoon, try going to sleep a bit later and getting up at the same time each morning. Avoid taking naps during the daytime. Keep in mind that the amount of sleep needed for each individual varies and changes, and feeling refreshed and alert after a good night's sleep may have nothing to do with quantity — just quality of the sleep you're getting.