Meditation to control anxiety and hyperactivity?

I have recently taken up meditation to help with becoming more spiritual in general, but I am also interested in using meditation to improve my general well being. When I am stressed and even after that (which is quite often) I tend to feel uneasy and restless in my feet and back then I get worried about my general health etc. Sympytoms only persist when I am not doing anything How do I meditate to calm myself down and help in alliviating the spasms and restlessness due to my stress/anxiety/inability to concentrate? Thank you and peace!