Pretty hard to lower your arm in a ground blind. You're already at ground level. Seriously, the little bit you may aim down at a close target while ground shooting isn't going to matter much for hunting. Still, it's good to draw the bow and aim at shoulder level then bend at the waist. Just a matter of practicing it till it becomes ingrained in the little pea brain. When an animal is front of you you should not have to think about these things. You should have learned and practiced all the little details. That's why there is time between seasons.