"After about 40, you'll wake up on Saturday thinking, "oh my gosh, it must be nearly noon!" and realize it's only 8:30 and you're wide awake." Good news: if y

"After about 40, you'll wake up on Saturday thinking, "oh my gosh, it must be nearly noon!" and realize it's only 8:30 and you're wide awake." Good news: if you maintain your exercise regimen - especially your resistance/weight training - you can maintain the ability to sleep 8 or 9 or 10 hours in a night.