Tennis players’ grunts predict whether they will win or lose.

Tennis is one of the few sports where loud grunting is common. So common, in fact, that these researchers did a whole study on the information communicated by tennis grunts. Turns out that the pitch of these grunts conveys information about the player’s sex (obviously), but also whether the player is losing or winning. Intriguingly, “this difference in [pitch] between losses and wins emerged early in matches, and did not change in magnitude as the match progressed, suggesting a possible role

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