Abstract: A method and system for matching an athlete with a selected striking tool. The method includes, and the system facilitates, receiving test data resulting from the athlete hitting a test target with a test striking tool to launch the test target. The test data is mathematically transformed to calculate a test functional group score. The test functional group score is compared with a database to match the test functional group score with matched previous data having a similar functional group score to the test functional group score. A selection parameter of the selected striking tool is defined to correspond with a value of the selection parameter associated with a strong performance metric in the matched previous data.

Abstract: A method and system for matching an athlete with a selected striking tool. The method includes, and the system facilitates, receiving test data resulting from the athlete hitting a test target with a test striking tool to launch the test target. The test data is mathematically transformed to calculate a test functional group score. The test functional group score is compared with a database to match the test functional group score with matched previous data having a similar functional group score to the test functional group score. A selection parameter of the selected striking tool is defined to correspond with a value of the selection parameter associated with a strong performance metric in the matched previous data.

Abstract: Disclosed herein are exemplary methods and systems for selecting a shaft flex for a golfer based on characteristics of the golfer's swing. Some exemplary methods comprise using measuring in-swing-plane shaft deflection values of a golfer's golf club during the golfer's swing, determining a phase of the golfer's swing when maximum in-swing-plane shaft deflection occurs; determining a kick velocity of the golfer's swing at impact with a golf ball; and selecting a shaft flex for the golfer based on the determined phase of the golfer's swing when maximum in-swing-plane shaft deflection occurs and based on the determined kick velocity of the golfer's swing at impact with a golf ball.

Abstract: Disclosed herein are exemplary methods and systems for selecting a shaft flex for a golfer based on characteristics of the golfer's swing. Some exemplary methods comprise using measuring in-swing-plane shaft deflection values of a golfer's golf club during the golfer's swing, determining a phase of the golfer's swing when maximum in-swing-plane shaft deflection occurs; determining a kick velocity of the golfer's swing at impact with a golf ball; and selecting a shaft flex for the golfer based on the determined phase of the golfer's swing when maximum in-swing-plane shaft deflection occurs and based on the determined kick velocity of the golfer's swing at impact with a golf ball.