Wilson Tennis on Twitter: "Stiffness: How much the racket frame flexes on contact Less Stiff=More Control More Stiff=More Power We measure Stiffness using the Stiffness Index (SI) Test. The more the racket
![The experimental arrangement for the modal analysis of a tennis racket... | Download Scientific Diagram The experimental arrangement for the modal analysis of a tennis racket... | Download Scientific Diagram](https://www.researchgate.net/publication/48341411/figure/fig3/AS:670038268837895@1536760980119/The-experimental-arrangement-for-the-modal-analysis-of-a-tennis-racket-a-and-the.png)
The experimental arrangement for the modal analysis of a tennis racket... | Download Scientific Diagram
![String Bed Stiffness of a Tennis Tour Player Frame is Measured Editorial Image - Image of futures, life: 53893555 String Bed Stiffness of a Tennis Tour Player Frame is Measured Editorial Image - Image of futures, life: 53893555](https://thumbs.dreamstime.com/z/string-bed-stiffness-tennis-tour-player-frame-measured-melbourne-australia-may-strings-measurement-used-to-check-53893555.jpg)