Agree with the others.
GNAS rules explicitly state the range safety requirements (section 302 of the rules of shooting which you can download from the
GNAS site).
Note that the
GNAS rules assume club grounds - shooting in your back garden is NOT covered as far as I can establish, so my advice is don't do it. If you MUST shoot at home perhaps consider a Skorten Exerset or similar which will allow you to work the muscles and build a rhythm without danger, or look at other archery specific training instead.