Lead by example

We've all heard it before, but now it's becoming more near and dear to me - the concept of leading by example.  I'm at the Triathlon America conference (which is awesome - more musings to come) and something that keeps coming up is how to get our kids more active.  One person wisely commented "if parents do tris (or other events) their kids likely will, too."  I'm also noticing it's becoming a cycle based on anecdotes people have - specifically, if the parents participate in events, kids will too, which will make parents participate more.

Here's a chart from the CDC that makes me so sad:

vs. 1987

According to the National Health and Examination Survey:
"About one-third of U.S. adults (33.8%) are obese. Approximately 17% (or 12.5 million) of children and adolescents aged 2—19 years are obese."

How do you keep your kids active?