Too much gain.

Look at the bottom of the page at the front of your post. There is a link to books that will give a good starting place to improve your knowledge about recording and how to set things so they are usable.

Researching this on your own will, of course, lead to more detailed questions which will be easier to deal with rather than a complete explanation which would take up much bandwidth.

I was going to suggest better carpets and softer sneakers.... :lol: :roll: :shock: ....but Davedog is probably right.

that's the great thing about condensers - they are super sensitive! get a room that downplays room noise, and, like davedog said, turn down your gain