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.
If you feel pain, you've stretched too far. Hold a stretch for 10 to 30 seconds, to the point of a slight pull, on each side. Repeat the stretch on both sides two to four times. Stretching is recommended two to three days a week. If you have health conditions or injuries, talk to your doctor or physical therapist about which stretches are right for you.