Sleep as Restoration
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The restorative theory holds that sleep exists to repair and replenish the body and brain after waking activity.
Show
Growth hormone release and tissue repair are concentrated in deep sleep rather than in waking rest.
Watch for
Restoration explains why sleep helps and not why it takes this form. A second account is needed.