I'm referring to, for instance, grunting in tennis. It refers to how many tennis players make loud "aaagh" noises when hitting a ball. In daily life, people often also do this when trying to lift something heavy, and etc. Recently, I noticed cats also make a similar noise (albeit smaller) when they are jumping onto a level that they can only barely reach.
Thus, the question: are there biological reasons why people cannot help but make such noises when trying to do something physically challenging? Does making noises help them achieve it for physiological reasons, or only for psychological reasons?
I searched online and wasn't able to find an answer.