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  • Feeling Tired and Sluggish? Here’s What Could Be Causing Your Fatigue
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  • Wellness

Feeling Tired and Sluggish? Here’s What Could Be Causing Your Fatigue

These factors could be contributing to your constant low energy, a Kaiser Permanente doctor says.

By Kaiser Permanente | Mid-Atlantic Permanente Medical Group Contributor February 4, 2026 at 7:00 am

Christie Youssef, DO, is a board-certified family medicine physician with the Mid-Atlantic Permanente Medical Group. She sees patients at the Kaiser Permanente Fair Oaks Medical Center.

Feeling tired and sluggish throughout the day is often a sign that your daily habits need a reset. Energy is built on the foundation of healthy lifestyle choices.

As a lifestyle medicine physician at Kaiser Permanente, I encourage patients who are feeling sluggish and worn out to focus improving nutrition, hydration, sleep, movement and stress management. Making small changes in any or all of these areas can help you feel more energized and alert.

Nutrition

What and when you eat play a major role in your energy levels. Skipping meals or relying on refined carbs can send your blood sugar on a roller coaster, leading to mid-morning crashes and afternoon slumps. Instead, focus on:

  • Protein-forward meals: Begin your day with a protein-rich breakfast. Eggs, Greek yogurt, tofu scramble, or a smoothie with protein powder can help stabilize blood sugar and prevent energy dips. Aim for 25 to 35 grams of protein at breakfast. (Your individual needs may vary.)
  • Balanced plates: For lunch and dinner, follow the plate method. Half your plate should include non-starchy vegetables, such as leafy greens, peppers or broccoli. One quarter of your plate should include lean protein, such as skinless chicken, lean beef, fish or tofu. The final quarter should include high-fiber carbs, such as lentils, quinoa or whole grains.
  • Micronutrients matter: Iron, vitamin B12, and vitamin D deficiencies can contribute to fatigue. Include foods rich in these nutrients or consult your doctor about whether supplements might be helpful.
  • Smart snacking: If you snack, choose protein-plus-fiber combos, such as apple slices with nut butter or hummus with veggies.

Hydration

Even mild dehydration can cause fatigue, headaches and brain fog. Instead of reaching for another cup of coffee, start with water. Here’s how to stay hydrated:

  • Drink consistently: Don’t wait until you’re thirsty. Make hydration a habit. Keep a water bottle close by when at work if you can. Try to pair water breaks with routine activities such as meetings or email checks. Fancy waters and electrolyte drinks aren’t necessary for most people. Regular water and balanced meals usually suffice.
  • Limit caffeine: Coffee is fine in moderation, but keep it to 8 to 10 ounces early in the day and avoid it six hours before bedtime. Too much caffeine can dehydrate you and disrupt sleep.

Pale yellow urine is a good indicator of adequate hydration.

Sleep

Sleep quantity, consistency, and quality all matter. Poor sleep erodes attention, mood, and motivation, making fatigue worse. To improve your sleep:

  • Stick to a schedule: Go to bed and wake up at the same time every day, even on weekends. This stabilizes your circadian rhythm.
  • Create a sleep-friendly environment: Keep your bedroom cool, dark, and quiet. Limit screens about 30 to 60 minutes before bed.
  • Limit alcohol.
  • Aim for 7 to 9 hours: If that feels impossible, start by adding 30 to 60 minutes for two weeks and reassess.
  • Cut caffeine early: Stop caffeine at least six hours before bedtime.

Movement and Exercise

Regular physical activity improves mitochondrial function, insulin sensitivity, mood, and sleep, all of which boost vitality. Here’s how to make movement work for you:

  • Start small: If you’re sedentary, begin with 10 minutes of brisk walking after meals.
  • Build up: Aim for 150 minutes of moderate aerobic activity per week, plus two strength-training sessions.
  • Try exercise snacks: Short bursts of movement, such as two minutes of stairs, squats, or lunges every few hours, add up and keep energy steady.
  • Get outside: Morning daylight exposure combined with movement helps reset circadian rhythms and improves alertness.

Manage Stress

Chronic stress is an energy drain. While you probably can’t eliminate stress, you can manage it. Here are some suggestions to try:

  • Micro-recoveries: Take short breaks for deep breathing, stretching, or a quick walk.
  • Breathing techniques: Try the 4-7-8 method — inhale for 4 seconds, hold for 7, exhale for 8.
  • Mindfulness and meditation: Even a few minutes of quiet reflection or reading something uplifting can lower stress hormones.
  • Protect your habits: Keep at least one or two routines, such as daily walks, consistent, even during stressful times.

Avoid Quick Fixes

When fatigue hits, you may be tempted to reach for energy drinks, sugary snacks, or endless scrolling on your phone. Here’s why those strategies can cause problems:

  • Energy drinks: High in sugar and caffeine, energy drinks cause jitteriness, anxiety, and sleep disruption, leading to worse fatigue later.
  • Alcohol: Drinking alcohol may feel relaxing, but it fragments sleep and worsens next-day mood and energy.
  • Doomscrolling: Constant phone use, especially at night, keeps your brain alert and delays sleep.
  • Skipping meals: Stress-induced meal skipping destabilizes blood sugar, increasing irritability and brain fog.
  • “Powering through”: Ignoring your body’s need for rest leads to burnout and decreased productivity.

When to Seek Medical Help

If fatigue persists for two to four weeks, worsens, or comes with symptoms like unexplained weight loss, night sweats, chest pain, shortness of breath, loud snoring, or abnormal menstrual cycles, consult your doctor. These could signal underlying conditions that require evaluation.

Feature image, stock.adobe.com

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