What is a flex in golf?

Definition

The amount of bending or loading that occurs in a golf shaft during the swing, categorized into standard ratings (Ladies, Senior, Regular, Stiff, Extra Stiff) that should match individual swing characteristics for optimal performance. Proper flex selection is crucial for maximizing distance, accuracy, and feel while ensuring optimal ball flight characteristics. Understanding flex requirements helps golfers choose appropriate equipment and optimize their performance through proper club fitting. Shaft flex affects launch angle, spin rate, and overall shot characteristics. Professional fitting includes flex analysis to ensure optimal shaft selection.