It's finally dawned on me after working a desk job for years and either experiencing an onset of drowsiness either mid-morning or mid-afternoon that I can do something about it, and that something isn't necessarily "eat something".
There are times where I feel like this and yes, I'm actually hungry and should eat a little something. A healthy snack like dried fruit and nuts, a granola bar, a piece of fresh fruit, etc.
But there are times where I'm feeling really drowsy and I'm not hungry. I'd still reach for a midday snack and it would maybe pep me up for a little while, but never really did the trick.
One day, I was feeling really sluggish and just decided I would get up from my desk and take a walk back to the breakroom. Well, that was a very short walk and I felt like I needed more so I decided maybe I'd walk out to the edge of the parking lot... still wasn't feeling like I was waking up, but I was starting to feel a smidge better.
I ended up eventually going for a 10- to 15-minute walk around the block, and when I got back to my desk, I was feeling alert and the drowsiness had left me.
So - if you're ever experiencing that yucky drowsiness in the middle of your morning and/or afternoon, get up and go for a 10-minute walk. Most offices in the US are required to provide two 15-minute breaks (as well as their usual lunch break) to their employees who work full-time hours. So make use of that break, and instead of going back to grab a cup of coffee or a Snicker's bar, go take a walk!
I'm planning to listen to my body more and more and will be taking more frequent walks when that drowsiness comes on.
I need to get the blood circulating and get myself out in some fresh air and sunshine. It's making a difference.