Arm Swing? What is that? I have never heard of a arm only swing method. It doesn't matter if you are male or female, you must use your legs to hit for power. Every hitter should have an athletic balanced stance, a negative to positive movement, direct hand path, a right hand and hip that pushes through the softball, right hand that pushes to extension, high finish, still head, balance finish. Just keep it simple people! I tell my hitters I want to see balance, hands & hips that push, and still head. If you talk about all of the technical stuff to these young hitters they will become robots. Just be careful! I know we all mean well. But back on topic. EVERYBODY SHOULD USE THE LOWER HALF! If somebody is teaching a arm only swing they should be banned from coaching, period!