I wouldn't say that geocaching has affected our weight directly but as a family we are much healthier since starting geocaching. For us, geocaching has been great for us physically, mentally, and probably (in a sense) spirtually. Because off all of this it has caused us to feel better which in turn has probably helped us to look better and lose some weight. We also like to do the less urban caches which get us out in the mountains and such.
C