"Fatigue and sleepiness are a bit different and important to make a difference between them," says Shelby Harris, PsyD, sleep-health expert and author of The Women’s Guide to Overcoming Insomnia. "You can be both, but we often confuse the terms."
Interesting. So how to tell if you're in the lure of one or the other?
1. Sleepiness is more about being tired and less about overall energy
If you're just feeling sleepy, nap time will be the solution to all your problems: when you're sleepy, simply and purely sleepy, your body is ready and willing to seek out the rest you need.
"Sleepiness is the actual act of falling asleep, napping and dozing at times when you’re quiet, sedentary, and don’t really always intend to doze," Dr. Harris says.
But napping won't come so easily if you're actually feeling fatigued, which means your body, mind, and soul are trying to run on 8 percent battery without ever going into sleep mode.
"Fatigue is that feeling of dragging a ton of bricks behind you, having no energy, no gas in your tank," says Dr. Harris. "However, when you’re able to try and nap, sleep just doesn’t come even though you want it to."
2. Fatigue and insomnia tend to skip together hand-in-hand
There's a vicious cycle that comes with more chronic fatigue: in essence, you're so tired you can't sleep. And because you can't sleep, you get stuck in this holding pattern of total exhaustion.
"Many people with insomnia but no other medical or psychiatric issues often have fatigue, but not sleepiness," Dr. Harris. "They try to sleep, but it just won’t come"
3. Sleepiness is usually about specific external or internal issues
Often you know why you're feeling a bit sleepy: you stayed up to watch just one more episode of that show, or you woke up early to make a gym class, cutting into your eight hours of rest. But if you find yourself feeling occasionally drowsy despite clocking in eight hours regularly, Dr. Harris suggests talking to your doctor about issues that could be impacting your sleep quality. Just a few potential suspects might be sleep apnea, circadian rhythm issues, and narcolepsy.
4. Fatigue may be a little bit more difficult to pinpoint
Feelings of prolonged energy drain might need a bit of trial and error before you really know what's going on. Dr. Harris suggests that you start by taking stock of your sleep hygiene. You can do this by practicing stress-reducing habits, limiting caffeine, maintaining a regular bed and wake time, keeping off screens for an hour before bed, limiting heavy meals and liquids within three hours before bed.
"Also work to increase physical activity by exercising, going for walks or doing something to move around," says Dr. Harris. "Physical exercise helps improve sleep and reduce fatigue. The key is to be consistent, say, at least two weeks. If after two weeks of making changes and sticking with them you haven’t seen any impact on your energy levels, then it's time to talk with your doctor."
"Exhaustion is more of a general idea that’s extreme and longer-term in nature," says Dr. Harris. "If you’ve made the above-mentioned changes—working to reduce stress and improve sleep quality and quantity—and are still feeling worn out, struggling to find energy to get through the day, and continue the activities you usually do, consult with your physician regarding possible causes."
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