I frequently fail to navigate around things completely when walking, and usually this happens when I'm either fatigued or in a hurry and my mind is wandering. I also get bruises I can't explain. While I'm doing housework or yard work, I get bumps and bruises and don't even notice because I'm focused on what I'm doing. I was horrible at sports. I would learn something and then unlearn it somehow, like serving a badminton birdie -- I learned it, did fine at it, and then lost it, and the gym teacher had to teach me again in steps. I have a lousy sense of rhythm and timing, and I think that's where my lack of coordination starts -- perhaps I perform movements out of order?
I know that was the problem with the badminton birdie.
I also don't balance well. It took me a long time to learn to ride a bicycle and roller skate, as a kid, and that old saying about never forgetting how to ride a bike doesn't apparently apply to me, because when I tried to ride one again as an adult, I had to learn again. Even then I could only ride certain types of bicycles. The mountain bike frame was fine, but the more streamlined racing type frame, where you have to lean way forward, I can't maintain my balance on. It's also a good thing I don't live where it gets cold in winter, because I'd be a menace navigating on icy walkways. I've had some bad falls on wet floors and pavement as it is.
I'm certain that some of my problems with sports are related to muscle tension from the stress of feeling observed. I tend to be extremely self-conscious, and that makes every muscle in my body tense up, so trying a new sport or doing anything physical in view of anyone makes me tense up so much that I'm sure that affects my performance a great deal. There was a time when my husband and I lived near a community college and could find hours when the tennis courts were vacant. Then I'd do fine practicing tennis with just him -- as long as I stayed relaxed. As soon as I started making mistakes, or he got impatient with me, or anyone else showed up to use the other courts, I'd tense up and then I would do terribly again. Then, as soon as I got a little winded, I'd do badly too.
Aerobic exercise gets me really clumsy. I don't know if it's getting winded or what, but immediately after aerobic exercise -- healthy, moderate amounts, mind you -- I'm extremely clumsy and more likely to walk into things.
I got an A in one PE class, and that was archery. Go figure. I'm so nearsighted I couldn't even see the target properly, but I did great at that. It sure shocked the gym teacher, who was aware of my problems with other sports.
I don't know if this is all Aspie related -- as I'm not even sure yet that I'm an Aspie. But my awkwardness and clumsiness have been with me forever.