Why You Feel So Exhausted: What Your Brain Is Really Doing Behind the Scenes
- Kesava Anderson
- 2 hours ago
- 3 min read
There are seasons in life where you feel completely drained—physically, mentally, emotionally—and it doesn’t always make sense.
You may not be doing more physically. You may even be resting more.
And yet… you’re exhausted.
Let’s talk about why.
Your Brain Is Always Working—Even at Rest
Your brain only makes up about 2% of your body weight, but it uses nearly 20% of your daily energy.
That’s more than your heart.
Even when you’re lying down or doing nothing, your brain is:
Regulating breathing, heart rate, and hormones
Processing thoughts and memories
Maintaining communication between billions of neurons
So even on your “rest days,” your brain is still working full-time.
What Happens When Life Gets Hard
Now imagine what happens when you’re going through:
Stress
Anxiety
Depression
Grief
Burnout
Your brain doesn’t slow down—it speeds up.
1. Stress: Your Brain Enters Survival Mode
When you're stressed, your brain activates a system designed to keep you alive.
It becomes:
Hyper-aware
Constantly scanning for problems
Focused on “what could go wrong”
This uses more energy and shifts your brain away from calm, efficient functioning.
2. Anxiety: The Brain Won’t Turn Off
Anxiety keeps your brain stuck in a loop:
Overthinking
Worrying
Replaying conversations
Anticipating future problems
Even when your body is still, your brain is running.
This constant mental activity burns energy and leads to fatigue.
3. Depression: Everything Takes More Effort
Depression doesn’t just affect mood—it affects how your brain uses energy.
Tasks that used to feel simple now require:
More focus
More effort
More energy
Your brain becomes less efficient, meaning it works harder just to maintain basic function.
Why This Feels Like Physical Exhaustion
Mental strain doesn’t stay “in your head.”
It affects your whole body:
You feel heavy and sluggish
Your motivation drops
Your sleep becomes less restorative
Even small tasks feel overwhelming
This is because your brain and body share the same energy system.
When your brain is overworking, your entire system feels it.
The Truth Most People Don’t Hear
If you’re feeling exhausted during a hard season of life, it’s not because you’re:
Lazy
Unmotivated
Failing
It’s because:
Your brain is working overtime to help you cope, process, and survive.
Why Rest Alone Doesn’t Always Fix It
You might think:
“I just need more sleep.”
But if your brain is still:
Overthinking
Stressed
Dysregulated
Then even sleep won’t fully restore you.
True recovery requires calming the brain—not just stopping the body.
What Actually Helps (Practical Steps)
Here are clinically grounded ways to reduce mental energy drain:
1. Regulate Before You Think
Calm the nervous system first:
Deep breathing (4-6 seconds in, 6-8 seconds out)
Grounding (name 5 things you see, 4 you feel, etc.)
Slowing your environment
2. Reduce Cognitive Load
Your brain is overloaded—lighten it:
Write things down instead of holding them in your head
Limit multitasking
Break tasks into smaller steps
3. Interrupt Mental Loops
When you notice overthinking:
Label it: “This is anxiety talking”
Redirect to a simple action (walk, shower, stretch)
4. Build Small Wins
In hard seasons, progress isn’t about big leaps.
It’s about:
Getting out of bed
Completing one task
Showing up
Each small win reduces mental strain and rebuilds energy.
5. Support the Brain Clinically (When Needed)
Sometimes your brain needs additional support:
Therapy (CBT, trauma-informed care)
Medication to improve neurotransmitter efficiency
Structured routines to stabilize function
Final Thought
If you’re tired right now—deeply, consistently tired—there’s a reason.
Your brain is not failing you.
It’s trying to carry more than it was designed to carry alone.
And the goal isn’t to push harder. It’s to support your brain so it doesn’t have to work so hard.