Bowlers, like all athletes, need to maintain physical strength throughout the bowling season as well as the off-season. Bowlers, again like all athletes, should do sports specific weight training exercises that will help their body and muscle memory. A bowler shouldn't be doing the same strength training program as a triathlete or a baseball player etc... Flexibility, along with strength, is a huge key in bowling, so along with strength training you should have a stretching work out as well. The main areas of the body that you want to focus on when weight lifting are your chests, shoulders, biceps, triceps, and your quads. Becoming a professional bowling can't just happen over night. You need to work your hardest and never give up when the going gets tough. You have to want it! You have to want to get up early in the morning to head to the gym. You have to want to spend countless hours at the bowling alley perfecting your throw. In short the biggest characteristic you'll need is passion. Below is a link to a bowling workout plan developed by the coaches at the University of Nebraska. If you're not doing some of these exercises, maybe next time you're at the gym go ahead and give them a try. They will help increase your game immensely. Set goals for yourself and be prepared to never quit.