Does anyone have experience with a polydac jumprope? They seem to range from 1 inch to 2 inches and from 2 lb to 7 lb? I'm used to using a standard and speed jump rope, but these look like an interesting add to my routine: nothing like adding something new!. I'm assuming the timing and speed work of a traditional jump rope is gone but the required cardio would increase?
How does using these thicker jump ropes differ from a standard jump rope? Is there any potential for injury to the shoulder?