Strain is low, but I feel tired
Why low strain does not always mean the day was easy.
Published: January 25, 2026 · 1 min
Strain is low, but I feel tired
Strain reflects cardiovascular load, not everything else. Mental load and short sleep can still create fatigue.
In short
- Low strain does not equal low fatigue.
- Mental load and short sleep are common reasons.
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This is an editorial explanation, not a consultation.
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