Practising pumping "ice skating style"

A couple of month ago I developed a pumping style I call "ice skating style". It's a modification of slalom style pumping. I'm leaning forward a little bit, hold both arms behind the back in straights and let one arm swing in turns. My original idea on this style was aerodynamics. But I found out that it's main advantage is a better balance between the feet. It shifts some weight on the rear foot witch makes it easier to get some more power from the rear leg. It also helps to reduce arm swinging and therefore saves energy. It took a while for my back to adjust. Now I'm able to pump like this non stop for at least half an hour and I think I will be able to double this soon.