Originally Posted by
Dantheman
Disclaimer: I am not an expert
Yeah, it's the soreness issue mostly. LBs certainly improve muscular endurance, but what makes them especially evil and good for ski conditioning is they are very eccentric dominant. Most of the muscle damage that causes DOMS occurs during the eccentric phase of a muscle contraction (lengthening under tension) and skiing is an almost completely eccentric activity. With repeated exposure you become resistant to this damage (Repeated Bout Effect), the the effect maxes out within 4-6 weeks so you hit diminishing returns pretty quickly.
Anything is *far* better than nothing, but if you're already doing some level of structured training program there's better uses of your time this far out of season.