The human runner
Evolution, anatomy and the role of the brain.
The running book by Daniel Berthold · German edition
Understand why you run the way you do.
The science of running — a handbook for training, injury prevention and long-term physical capacity.
30 chapters connect sports medicine, training science, biomechanics and everyday work with runners — from a first 10K to the marathon and returning after injury.
First edition, 2026 · GermanThe Code Publishing
Science · Training · PerformanceThe idea behind The Run Code
Mileage alone does not make a better runner.
A watch can reveal progress, but cannot explain every episode of fatigue. A shoe can change running economy, but cannot replace physical capacity. A training plan provides structure, yet does not automatically recognize when the body is adapting — and when it is merely compensating.
The Run Code makes sense of these relationships. It explains how performance develops, why injuries occur and how training, technique, strength, nutrition and recovery work together.
30 chapters8 parts4 race distances1 Run Code system
Explore the German-language sample
Start with the question that matters to you.
Starting to run
Connect your goal with current capacity and everyday life. The sample introduces five questions to ask before choosing a plan.
Read these pages in German →Ambitious recreational runners
Understand how VO₂max, threshold and running economy contribute to performance.
Read these pages in German →Half-marathon and marathon runners
Compare the demands of four race distances and the principles that good training plans share.
Read these pages in German →Returning after injury
Explore the role of physical capacity and the criteria considered before restarting running.
Read these pages in German →Coaches and curious readers
Consider symptoms, load and the runner’s response together, instead of treating isolated measurements as the whole picture.
Read these pages in German →
Contents
From the human runner to your own system.
The eight parts build on each other: understand, interpret, train and remain capable over the long term.
The science of running performance
VO₂max, threshold, running economy, training zones and periodization.
Biomechanics and running technique
Foot strike, cadence, the hip, foot mechanics, running analysis and gait retraining.
Strength and injury prevention
Strength training, plyometrics, tendon adaptation, mobility and warming up.
The most common running injuries
The knee, Achilles tendon, calf, plantar fascia, hip, hamstrings and back.
Shoes, orthotics and technology
Carbon shoes, orthotics, wearables, running data and AI coaching.
Nutrition, recovery and health
Fueling, hydration, supplements, sleep, hormones and the immune system.
The Run Code system
Assessment, five-stage running development and plans from 5K to the marathon.
37 pages · 12 topics · German sample
More than a first look. See the difference.
The expanded sample spans the book’s full range: why VO₂max alone cannot explain a race, how running style distributes load, what strength training offers runners, why injuries rarely have just one cause — and how these insights become a workable training plan.
Page 1 of 37 · Cover
37 pages · 12 topics · click, swipe or use ← → to turn pagesDownload German PDF
Topics in the sample · translated excerpts
Three ideas to keep reading.
Running looks simple. Inside the body, it is a system.
Endurance depends on the interaction of heart and lungs, muscles, tendons, metabolism and movement. The sample connects these foundations with practical questions about running.
More measurements do not automatically provide a better basis for decisions.
Watch data can reveal trends. Training history, symptoms and recovery also matter. A single measurement cannot explain why performance has stalled.
A good plan must also work in real life.
Training volume and intensity need to fit previous loading and daily commitments. Consistency and sufficient recovery are part of that plan.
Who the book is for
For people who want more than mileage.
New runners
Understand the foundations, avoid common mistakes and build training sensibly.
Ambitious runners
Make better sense of performance measurements, training zones, running economy and race preparation.
After symptoms or injury
Understand capacity, tissue response and a gradual return to running.
Coaches and therapists
Connect training, biomechanics and sports orthopedic decisions in one model.
The author
Physician. Scientist. Athlete.
Daniel Berthold writes from three perspectives that keep each other in check: the physician sees injury and limitations. The scientist asks for evidence. The athlete understands the desire to improve — even when the body has long been asking for caution.
About Daniel BertholdThe Run Code
Explore the book.
Explore The Run Code in the free German-language sample. Selected pages connect running science, training and the return to running after injury.
Open the sample German-language reading sample
