I agree and disagree. I just turned fifty and as far as I am concerned, age is just a number. My body may not be as agile as it was at thirty however my mind is. I have a 16 and 20 year old. They help me to stay mentally young. I do exercise, eat well and have always taken care of myself. In my opinion, your mental status reflects whether you act like a "young fifty" or an old one. Maybe when I am 59 I will think differently. There is too much to do in life to concern oneself if they are acting their age. I do agree there are limits as to what to do and not do. Just as there are ways to wear popular styles at any given age. I have a father living in a personal care home. I've witnessed young 80 year olds and old ones. As far as I am concerned, live your life to the fullest now by taking care of yourself and by thinking young. Thinking old before your time is sooo not cool.