Fatigue & energy limits

Why am I so tired—and why doesn’t rest fix it?

Fatigue can feel like sleepiness, weakness, brain fog, or an empty battery. Map when it hits, what it costs, and whether activity makes you worse later.

Map my fatigue patternUnderstand pacing & PEM
Quick fatigue check

What does your low energy look like?

Choose the closest answer. This is educational and does not identify the cause of fatigue.

1. How often does fatigue limit your day?
2. What does rest do?
3. What happens after a demanding day?
4. How much function have you had to give up?
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Your pattern preview

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Fatigue burden

Fatigue has many possible causes. New, severe, or worsening fatigue—especially with chest pain, fainting, breathing trouble, bleeding, fever, or new neurologic symptoms—deserves prompt medical evaluation.

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Words that can help

Pacing is not “doing nothing.”

It is matching demand to capacity, protecting essential activity, and learning which kinds of exertion create delayed costs.

1

Energy conservation

Prioritize, plan, position, and pace. Shorter tasks, seated options, rest before depletion, and fewer transitions can preserve capacity for what matters.

2

Spoon theory

“Spoons” are a simple way to describe limited daily energy. Mito Map can add detail by tracking which tasks cost energy and how long repayment takes.

3

PEM

Post-exertional malaise is delayed symptom worsening after exertion—not merely feeling tired after activity. Timing and duration are important clues to record.

Beyond a fatigue diary

Find the pattern behind your good days and crashes.

Mito Map connects symptoms, activity, sleep, recovery, interventions, and function over time.

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Educational information only. This page does not diagnose the cause of fatigue or replace individualized medical care.