Is there a religion or spiritual practice that involves yoga and/or meditation but not God or Enlightenment?

I'm very interested in converting from the religion I was brought up in. I have typically labeled myself as "atheist", but somehow I feel that this isn't quite enough. I am very interested in yoga and meditation and believe deeply in it, so I researched Buddhism... but Buddhism involves too much about Enlightenment. I don't believe that there is any sort of supernatural being or any point where a person becomes "enlightened", I simply believe in utter calm and peace of acupuncture, yoga, and meditation. Is there a religion/spiritual practice for me?