Clem, since you said you are a beginner, let me clarify. I understand what Terry is saying, you may want to try to keep the basic "t" as much as possible. Instead of dropping the bow arm and standing in a straight up position to shoot at a target lower then shoulder height, bend a bit at the waist (or drop a left knee a bit). Always keep the same "t" in your stance (shoulders/arms to torso) as consistant as possible. By dropping your bow arm, you will need more muscle to hold the bow steady (it will also through some other things off as well).