My dh and I were both somewhat ahead coordination-wise as kids; he had more opportunities for team sports than I did and he did excel, but this was more in his teen years. I remember little things like being moved over to the boys basketball games in elementary school and getting the best high jump numbers one year (I was probably one of the few actually trying, but that's another issue).
Ds9 is sort of back and forth.
Some physical things he has been right on with, but we've had to find those things. Soccer was definitely 'meh' at age 3 and again when he was 5, and swimming, well he's 9 and he still doesn't like his face in the water much, or know how to breath and swim at the same time...but he loves the water.
I am a lousy swimmer, but did take lessons as an adult so can do the basics. My dad never swam; my mom was a fish. My dd3 is a fish.
We are signing up for daily lessons for ds most of the summer this year, as we saw little progress with lessons spread out too much, as Jane mentioned. Swimming is more than just a sport, I think as a life skill (life preserving ability) it is too important to miss out on completely, but we are trying to give him his own time to move into it.
Biking is another area that just may be too fraught with obvious risk for ds to enjoy/learn well yet, so the bike is waiting for him.
He is doing well with dance however, and has always enjoyed martial arts and running, and kept up just fine. In fact, sparring is an area where he really seemed to be ahead of the pack and is beginning to move in that direction in dance as well.
6 years is young for understanding whether a child will or won't be athletic/interested in sports, but if you are worried that he is very behind in coordination, I suppose I would speak with a pediatrician, but also I would recommend thinking outside the box when it comes to things to try: hiking, rock climbing, tap, martial arts, etc. (pretty much what Jane, others said!) Good luck to your ds
