to slide would mean to me....bowling into your senior years. i'm 65 and if i didn't slide,my kness and back would be a sore mess. yesterday during a rain we had and we were bowling,i started to stick at the line (which is devistating to my game). i had to start planting my slide foot for about a game and a half (before i was able to slide again) and my knees and back started to tighten up and become sore. to me,that is one of the reasons to slide and i still get the speed ,hook and roll. i guess you would call it longevity?