What is your skiing level? The shorter the rope the more stress on the SIJ. Just walking around stresses a weakened SIJ so you can imagine the stress on the pelvis running 38 off. One chiropractic visit won't fix an injured SIJ. It takes months for an injured SIJ to heal, if ever. Strongest pelvis in sports wins....Joel Howley, Andy Mapple, Chris Parrish, Carl Roberge, Nate the Great, Regina, Jeff Rodgers.