1 An utterance is a natural unit of speech bounded by breaths or pauses. 2  An utterance is a complete unit of talk, bounded by the speaker 's silence.
The best time to do flexibility exercises is when your muscles are already warm so they can stretch farther without tightness or pain. If youâre doing only stretching exercises, warm up with a few minutes of easy walking first to warm up your muscles.
30 seconds is the minimum duration to get the benefits of stretching, whereas two minutes is the maximum (if a position can be held for more than two minutes, a farther stretch should be performed).