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.
As for how long to hold stretch, you ought to stretch until you feel looser, whether it's 15 seconds, one minute, or more. Remember, you're stretching to loosen muscles and feel better, so forget counting.