It is important to get at least some outdoor activity. I think of how many people I know who complain about life, and they tend to be very sedentary. Many are in my own family. I certainly believe wholeheartedly in "what doesn't kill you makes you stronger" -- someone else must as well, Kelly Clarkson's song Stronger has become somewhat of an anthem for those going through adversity. Something like 4 1/2 million digital downloads of the single speaks to the popularity of the sentiment, IMHO (ok, she's kinda hot in the video, too)