I've found that often when I feel groggy during the day. Taking time out to do 5 to 10 minutes of deep twisting back stretches will revive me almost as well as a power nap.
That's pretty interesting. These pilots, and I suspect most of us, spend almost all of their working time seated in a chair. I'd be curious to see a study of people whose jobs require a lot of physical activity, or even just standing and walking. Would a nap be as beneficial or as necessary? (I'm guessing yes, but that their alertness doesn't get as low to begin with.)
