---
id:"kb-2026-00426"
title:"Running Fundamentals"
schema_type:"TechArticle"
category:"health"
language:"en"
confidence:"high"
last_verified:"2026-05-22"
generation_method:"ai_assisted"
ai_models:["claude-opus"]
derived_from_human_seed:true
primary_sources:
  - title:"Daniels' Running Formula (Jack Daniels, 4th Ed)"
    type:"book"
    year:2021
    url:"https://www.humankinetics.com/products/daniels-running-formula-4th-edition"
    institution:"Human Kinetics"
secondary_sources:
  - title: "MDN Web Docs — HTTP"
    type: "documentation"
    year: 2026
    url: "https://developer.mozilla.org/en-US/docs/Web/HTTP"
    institution: "Mozilla"
completeness: 0.88
ai_citations:
  last_citation_check:"2026-05-22"
---

## TL;DR

Running is one of the most accessible and effective forms of cardiovascular exercise. Training principles: build gradually (10% rule: don't increase weekly mileage by >10%), polarized training (80% easy, 20% hard), recovery weeks (every 3-4 weeks reduce mileage). Proper running form: midfoot strike, cadence 170-180 steps/min.

## Core Explanation

Couch to 5K (C25K): 9-week beginner program. Easy runs: conversational pace (Zone 2) — builds aerobic base. Tempo runs: comfortably hard — raises lactate threshold. Intervals: hard efforts with recovery — improves VO2max. Long run: weekly, 20-30% of weekly mileage. Injuries: shin splints, runner's knee, plantar fasciitis — most from too much, too soon. Shoes: replace every 500-800km.

## Further Reading

- [Daniels' Running Formula (Jack Daniels, 4th Ed)](https://www.humankinetics.com/products/daniels-running-formula-4th-edition)