DS wanted to go exercise. I used to have a real jogger but sold it because DS hated it and it was so freaking heavy I couldn't make it through our hilly neighborhood. But, since DS is fast on his bike now that he has a two wheeler, I knew I would have to run with the swivel wheel stroller, not just walk. Luckily, the front wheel locks. The wheels are only 12", but I actually kind of liked running with it because it is only 18 lbs instead of 26. We made it a full three miles with only three water breaks for DS and stopping to help a turtle cross the road. Neither of us had to walk up the 1/2 mile hill at the end, which I think is a pretty big accomplishment for a four year old on a bike and a lady running with a stroller for the first time in three years. :-)