Anggriawan Sugianto

You don't need to read these posts in order. You also don't need to read all of them.

This isn't a book: it is a documentation of a system written as standalone observations about ultramarathon training. Think of it as a collection of field notes rather than a narrative arc. There are specific paths through the content depending on what you want to understand.

BTS Ultra 100K - 2025

If You Want to Finish Your First 100K

If you want to understand the minimum viable system to finish a 100 kilometer ultramarathon, here is your reading path:

Foundation:

• The Algorithm of Endurance: Why I run.
• The Architecture of Endurance: What you're learning (the system I built).
• Bio-Structural Audit: Understand your body before training.
• Red Flags & Screening: Prevent injury before it happens.

Then Skip Straight to Ultra:

• The Mindset Shift: Why 100K is different from marathoning.
• Strategic Periodization: How to structure 6 months of training.
• Ultra-Specific Work: Building durability and vertical climbing.
• The Ultra Stomach: How to fuel for 20 plus hours.
• Psychology & Grit: Mental frameworks for the hard moments.
• Crew Management: How your support team makes or breaks your race.
• Problem-Solving: What to do when things go wrong.

Then (Optionally) Understand Why:

• Bioenergetics: How your body actually produces energy.
• Fuel Selection: Understanding metabolism and fat adaptation.
• Threshold Diagnostics: Measuring your actual fitness.
• Data Integration: Knowing what your watch is actually telling you.

This path takes you from identity → understanding your body → building ultra-specific fitness → executing a race → understanding why it works.

Total time: 6-7 hours of reading + 24 weeks of training.

If You Want to Understand the Complete System

Read all posts in order. This gives you:

• System Rationale: Understanding why structure trumps willpower.
• Self-Coaching: Learning to manage your own training and adaptation.
• Body Awareness: Building a baseline for physical performance.
• Marathon Foundations: Mastering the core principles of distance running.
• Ultra Architecture: Integrating mindset with training structure.
• Technical Skills: Developing proficiency for trail and mountain terrain.
• Performance Science: Optimizing for energy, environment, and data.
• Synthesis & Mentorship: Scaling your knowledge for long-term mastery.

This is the full journey from identity to mastery.

Total time: 12+ hours of reading.

If You Want Deep Science

• Bioenergetics: How your body produces energy.
• Fuel Selection: Carbs vs. fat vs. metabolic flexibility.
• Advanced Fueling Tactics: Using data to optimize.
• Climate Conditioning: Heat, cold, altitude, and sleep deprivation.
• Systemic Resilience: Managing inflammation, immunity, and hormones.
• Masters Optimization: Adapting for your age and genetics.
• Benchmarking: VO2 Max, HRV, and power.
• Threshold Diagnostics: Lactate testing, RPE, and cardiac drift.
• Data Integration: Turning metrics into decisions.

What These Posts Are NOT

• Not a book: This isn't a finished narrative with a beginning, middle, and end. It's a collection of interconnected observations about a system.
• Not doctrine: I'm not claiming my way is the only way. I'm documenting one system that works. Your mileage may vary.
• Not complete: As I train through 2026, I'll learn new things. Some posts might become outdated. That's okay. The system adapts.
• Not a training plan: This is the framework for building a training plan, not the plan itself. You personalize it to your body, your schedule, your goals.
• Not a substitute for professional help: If you have injuries, medical conditions, or mental health concerns, see a professional. This is about systems thinking applied to endurance, not medical advice.

What These Posts Actually Are

• Real: Written from actual experience, not theory.
• Honest: About what worked and what didn't.
• Practical: Every observation is something you can actually implement.
• Interconnected: Each post builds on concepts from others, but you can read them independently.
• Evolving: As I learn more, my thinking evolves. Early posts might get revisited.
• System-focused: Every post points back to the core principle: ultramarathon success is built on systems, not willpower.

Why This Approach?

Most running blogs are written for general audiences. They assume nothing. They explain everything. They become 10,000-word rambles because they're trying to serve everyone.

These posts assume you are quite serious. You are not just curious; you are training for something hard. You want the unvarnished truth about what actually works.

I don't explain basic concepts. I assume you know the difference between easy and hard running. I assume you understand that periodization exists. I assume you are willing to be uncomfortable in service of a goal.

If you are not ready for that level of honesty and directness, this might feel harsh. That is okay. Different writing styles for different readers. But if you are ready to understand how to build a system for yourself, these posts are for you.