also.... the quicker/more forcefull the weight shift is the faster can rotate. try this..... cross hands over shest touching shoulders (it is ok to let you weight get outside/on top your feet for this example) stand with 90% of weight on back foot and then make a BS...pretty easy...now keeping that weight on that foot make a DS, not as easy to turn you shoulders forward. do the same with 90% weight on front foot make a BS kinda hard to do, then back a DS you can really rotate foward fast and powerful now. so the quicker you are able to get you weight back onto you front foot and make the front foot/leg a base to turn around against you can rotate much faster

people joke about the happy gilmore swing but if you had stong enough legs to support all that forward momentum you developed from running and pushed that momentum down like a running jump you could hit the ball quit far i would think, but not very accurate lol