
Originally Posted by
ginny
it seems to me that some people seem to equate fewer hours sleeping to somehow being smarter or busier or just better (?) - I have never understood this, for I need sleep! When I run a lot and bike a lot I sleep more. This is how my body recharges and how I manage not to hurt myself. When I lose my precious sleep, I tend to get sick. Though having said that, six days a week of high intensity work outs is just begging to get hurt or sick! Your body needs time to recover. Even when I'm doing crazy miles running, my daily runs are kept pretty short (4-6 miles), and of fairly low intensity. Same goes for riding for me - If I'm going to do a century on the weekend in the hills, I keep my daily rides/runs pretty easy. Listen to your body and rest as needed - take two pieces of chocolate and let us know how you feel in the morning

60 Minutes recently aired a piece about sleep and the very strong misconception--especially in the U.S.--that being able to "survive" on less sleep is an indication of good health. The report essentially said that just the opposite is true. Even a modest amount of sleep deprivation can lead to a plethora of health problems and that we should, therefore, strive to get the recommended amount of sleep every night, i.e., 7 to 9 hours. The report also said that as we age, our sleep becomes less restful. Thus, even if we get the same number of hours of sleep, we may still feel sleep deprived. I dont' recall that they offered much of a solution to that. 
I provided a link to a New York time article a few months ago about the effect of aging on endurance activities. I'll try to find that again. One comment that stood out is that older folks can and should strive to maintain the intensity of their workouts but should do fewer of them. In other words, you can handle the same intensity but need longer recovery times.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher