You don't want to start your adventure in sleep deficit! (blog.cloudb.com)
That way, you won't end up with a long - term sleep deficit, and you'll keep your energy levels and your potentially naughty cravings in check. (fitpregnancy.com)
Sleeping nine hours or more a night on regular basis actually might be appropriate for young adults, people recovering from sleep deficits and those who are ill. (rismedia.com)