My son (aged 9 and newly diagnosed AS) used to wave his arms around it circles when he was anxious - he paced up and down swinging his arms and was distressed if he couldnt. Now he does a funny thing with his hands instead - we never stopped him swinging his arms it just changed to something else and is so much more manageable.
In terms of physical things - he cannot use a knife and fork, cannot skip, cannot ride a bike, was struggling with swimming although with one to one lessons this has improved. We have just got a diagnosis and I am going into school on Friday to speak to SENCO for the first time - all new, scary and challenging but great that people are finally recognising what I have seen for years