linguistic:voice_change
Readiness for physical exertion

This is when a person prepares themself for significant physical exertion. For example, before a sportsperson begins to play, they have prepared themself by warming up their body and psychologically focusing on the task ahead. They are thereby in a state of readiness to exert themself. To an observer they appear to be 'pumped up'. Their body language is suggestive that they are about to move quickly and more energetically, they appear physically larger, and their movements are often bigger.