I think not..............
I woke up this morning barely able to move, full of the cold, bunged up, raging headache - so I stayed in bed. All day.
OH has been making his usual "You'd feel better if you were up and about doing things" type comments, and the wasted day was from him too.
I can think of nothing less wasteful than a day in bed resting and taking it very easy, letting your body heal itself; one day taken out today will repay hundredfold next week, when I would have felt dreadful for two or three days as whatever it is I have dragged on.
So, a day well spent, I conclude :)
The rather gorgeous tree bed is by Shawn Lovell :http://www.slmetalworks.com/beds_a.html