He's a member of his school's football team, and thanks to a book I got on football for youth (it was a steal at P98 at a book sale) I learned that he needs to develop his endurance. So this afternoon, we got dressed and went for a (very short) run.
It wasn't a structured running workout - I'm saving that for when he gets accustomed to running. I also didn't want to pressure him into running fast. I just wanted him to have fun and enjoy the outdoors. We did some slow jogging and occasional sprints. All in all, we ran 2.01 km in 18:59 mins (at a 9:27/km pace). Today, I ran like a kid. :)