Why do it?

This is a question I get asked on a regular basis.  Especially when people see my training schedule.  Today I went out with the group for a few hours on the bike.  It was very windy but that was a good test for my new wheels.  The strong headwind made the hills tougher however after the hilly mountain bike workout yesterday I felt strong - not as strong as some of the "real" cyclists but I have come a long way in the last 2 years and can feel the difference.
Home for some lunch and then out for an hours run.  The wind had really picked up but I just got on with it.  My coach has me running a negative split i.e. faster 2nd half so that you finish strong.  I haven't been doing much running recently but I managed this at a good pace.
So why do it?  I feel fantastic and am in good shape.  This improves my quality of life which benefits my family and helps me be more effective at work. Finally it allows me to raise money for the charities I support which also makes the whole journey worthwhile.  So I hope that answers the question but every time I'm asked it it reinforces my belief in what I'm doing.