I bowled in a kegel challenge league this year where the patterns change every two weeks. We also have a chance to practice on the shots the night before. I hear all the time on here and other message boards and folks around the centers that your sport shot league average should be 20 pins lower than your standard league average. Let me tell you all something that say or believe this that haven't bowled on one of these sport leagues, YOU ARE DEAD WRONG!!!!!!!!!!! Its probably closer to 30-40 pins lower than you standard league average. For me it was about 40 pins different. I averaged 180 in this Kegel League. These leagues are tough and worth the challenge!!! It magnifies your mistakes to a whole new level, and puts a huge emphasis on spare making. There are a few great bowlers in this league that average 235-240's on standard leagues and barely hit the 200 avg mark. These leagues are tough, and I for one enjoyed the challenge this season.