I subscribe to Gary and Merri Scott's Newsletter because they are always on the edge of new and interesting information. In one of Gary's recent emails he talked about how often people like writers (and truckers) can get tired from lack of exercise. Gary talks about how our brain takes it's food from our cerebro spinal fluid (not the blood stream) and that it takes exercise to move these nutrient carrying fluids to our brains. Turns out Gary's chiropractor has shown Gary a super easy and effective exercise to pump if you will, the cerebro spinal fluid up to the brain. I've started using this exercise myself and find it really does work. In a nutshell all you do is inhale deeply as you shug your shoulders back and look up. Then as you exhale you hunch your shoulders forward as you move your head to look down. I do this three or four times and find it really does help alleviate my fatigue. Here's a link to Gary's article which also has some photo's of Gary doing his anti fatigue brain exercise.
Been trucking since 96. My main interest is having a good healthy life.