What I mean by this is, could you go to sleep and wake up worse than when you went to bed in the first place. Instead of
6 Hours Sleep - mask = 0 Hours Sleep
4 Hours Sleep - Mask = -2 Hours Sleep
As some days I dont have time to put my mask on I can wake up with a feeling of I would have been better of not going to bed at all as I feel worse now?
Is it possible to fall into the red and owe your body sleep after you have woken up.