When I grind, I wear the same thing tomorrow. When you grind, it’s Showtime at the Apollo.
Grunting During a Tennis Shot May Provide a Competitive Advantage
Some tennis fans and players feel that grunting during a tennis shot distracts the opponent, and therefore provides an unfair competitive advantage. Many professional tennis players grunt; one of them (Maria Sharapova) is reported to grunt at over 100 decibels. (…)
Grunting slowed down student response time by between 21 and 33 milliseconds, and the students made between 3% and 4% more predicted directional errors, whether the video clips ended at contact with the ball or 100 milliseconds afterwards. These differences in time and error were statistically significant.
