YEP !  Here's what happens when you push the power button:

Your breathing rate goes up 30percent, your blinking rate goes way down, and you tend to tighten your arms and shoulders without knowing it.

In order to slash the stress, change your body position every half hour or so —simply standing while talking on the phone can improve blood flow and ease muscle strain.
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Source: Institute of Holistic Healing, San Francisco State University

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