What Do Tennis Players Chew for Focus, Energy, and Nerves?
                                
                                
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                                    4 min read                                
                            
                                According to a 2011 study at St. Lawrence University, chewing gum can improve cognitive functions like memory and reaction time, an effect relevant to the tennis court. This provides a glimpse into why tennis players chew various items during a match, a practice that extends far beyond simple boredom.