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Why does tiredness feel as though it comes in waves?

Sarah Jenkins
Sarah Jenkins
Lead Content Curator · Mar 17, 2026 · Updated Apr 13, 2026

Biorhythms. Your body has cycles: breathing, heartbeat, blinking, even which nostril you use. Your wakefulness/tiredness is also cyclic.

19
Words

1 min
Read Time

#471
of 500 in Science

-74%
vs Category Avg

The Short Answer

Biorhythms. Your body has cycles: breathing, heartbeat, blinking, even which nostril you use. Your wakefulness/tiredness is also cyclic.

Analysis

Key Concepts: Biorhythms, body, cycles

This explanation focuses on biorhythms, body, cycles and spans 19 words across 3 sentences. At 74% below the average Science explanation (72 words), the answer takes a direct, no-frills approach — sometimes the simplest explanation is the most effective.

What This Answer Covers

The explanation opens with: “Biorhythms.” It then elaboratesultimately building toward a complete picture across 3 connected points.

How This Compares in Science

Ranked #471 of 500 Science questions by answer depth (top 95%). This is a brief primer — the answer is intentionally short. For questions with a single core mechanism, brevity can actually be a strength.

Frequently Asked Questions

Is there a simple explanation for why tiredness feel as though it comes in waves?

Biorhythms. Your body has cycles: breathing, heartbeat, blinking, even which nostril you use. Your wakefulness/tiredness is also cyclic.

How detailed is this explanation compared to similar Science questions?

This is a brief answer at 19 words, ranked #471 of 500 Science questions by depth. The key concepts covered are biorhythms, body, cycles.

What approach does this answer take to explain tiredness feel as though it comes in waves?

The explanation uses direct explanation across 19 words. It is categorized under Science and addresses the question through 1 analytical lens.