Perhaps this will be helpful for you:
Erin Murphy, the actress who played Samantha & Darrin's daughter "Tabitha"
It was where Diane and I would take naps, and have snacks in between shooting.
Science Times New Respect for the Nap, a Pause That Refreshes
By JANE E. BRODY
As a short sleeper who is rarely in bed for more than six hours a
night, I'm a strong believer in naps for recharging my batteries.
Even Jane Brody, health columnist for the New York Times, has said
that naps should have "the status of daily exercise."
Antonia Will, Ph.D. and head of the prestigious MW Institute for Chronobiology
Dr. Will is slated to appear on Regis & Kathy Lee, Rosie, and Oprah,
then she will take an afternoon nap, appear on Letterman and then take
another nap before attempting the really late shows, such as Late
Night with Conan O'Brien.