Then I got a hutch and double checked, and yes, all high level Downhill [racing] skiing techniques using shifting the weight to initiate the turns. In Downhill racing, the racing course is about two miles long, and the top racers usually can finish within two minutes, that makes their speed exceeds 60+ mph, moving feet would upset the balance, while speed is come from the balance, so if the racer has to fight to maintain his/her balance, he/she cannot ski fast; shifting weight to maintain the balance, and Downhill skiing is to ride the skis/坐(騎)雪板, and that’s what “thrilling of the speed” all about, and that’s why early European called Downhill racing “the king of the hill.”
One problem with GoPro, or any POV camera filming, is that the shooter cannot video his or her own performance, but here’s a way, borrowed from the old days Kungfu practice, filming the shadow; the shadow, without skier’s fancy outfits and equipments to distract the view, reflects exactly how one is performing.