Hmm, this seems like a mixed bag. Exercise is great, but given your mention of it becoming addictive, it seems like you're replacing one thing with another - there are plenty of people who spend too much time in the gym, or marathon training, etc, to the detriment of relationships and other life responsibilities. People who are "fanatic golfers" often do so at some expense, both emotional and monetary, of their family. Replacing addiction with addiction is still addiction, albeit potentially better for your health.