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Why marathon training doesn’t recommend runs greater than 20 miles.

Mark Sterling
Mark Sterling
Research Editor · Apr 12, 2026 · Updated Apr 13, 2026

Source – My dad used to run marathons Your body doesn't know the difference between running a marathon and getting hit by a bus. Its horrifically bad for the body. Remember the story of the original marathon…

77
Words

1 min
Read Time

#198
of 500 in Nature

+8%
vs Category Avg

The Short Answer

Source – My dad used to run marathons Your body doesn't know the difference between running a marathon and getting hit by a bus. Its horrifically bad for the body. Remember the story of the original marathon… that dude DIED at the end. So you don't want to push your body beyond its limits *until you actually are running the race*. All you'd be doing is causing damage to your body that it will have to fix.

Analysis

Key Concepts: Body, running, marathon

This explanation focuses on body, running, marathon and spans 77 words across 6 sentences. The depth is typical for Nature questions (category average: 71 words), striking a balance between accessibility and completeness.

What This Answer Covers

The explanation opens with: “Source – My dad used to run marathons Your body doesn't know the difference between running a marathon and getting hit b” It then elaboratesultimately building toward a complete picture across 6 connected points.

How This Compares in Nature

Ranked #198 of 500 Nature questions by answer depth (top 40%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.

Frequently Asked Questions

Is there a simple explanation for why why marathon training doesn't recommend runs greater than 20 miles.?

Source – My dad used to run marathons Your body doesn't know the difference between running a marathon and getting hit by a bus. Its horrifically bad for the body. Remember the story of the original marathon… that dude DIED at the end. So you…

How detailed is this explanation compared to similar Nature questions?

This is an above-average answer at 77 words, ranked #198 of 500 Nature questions by depth. The key concepts covered are body, running, marathon.

What approach does this answer take to explain why marathon training doesn't recommend runs greater than 20?

The explanation uses direct explanation across 77 words. It is categorized under Nature and addresses the question through 1 analytical lens.