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.

In late 2024, I made a decision that seemed insane at the time: I was not going to hire a running coach.

Not because I couldn't afford one. Not because I didn't believe in coaching. In fact, I have seen the value of professional guidance firsthand. I was coached as part of the ASICS Marathon Team in 2023 and influenced by the Pocari Sweat Sports Science team while serving as a Pocari Sweat Marathon Pacer in 2024.

However, I realized something about myself: I think better when I understand the system, not just the directives.

A coach would tell me: "Run 10 kilometers easy on Tuesday. Do four repeats of 1600 meters hard on Wednesday."

I would follow the plan. If it worked, great. If it did not, I would blame the plan or myself, but I wouldn't actually understand what happened.

Instead, I decided to reverse-engineer my own training system from first principles, synthesizing methodologies from foundational texts like Daniels’ Running Formula, 80/20 Running, and Advanced Marathoning.

Trans Jeju 100K - My first UTMB World Series

Why You Don't Need a Coach (But You Need a System)

I'm not anti-coach. Good coaches are valuable. But most runners don't need a coach. They need a system. Here's the difference:

A coach is a person who:

• Knows your history, injuries, and psychology.
• Adjusts your plan in real-time based on how you're responding.
• Provides accountability and motivation.
• Costs $30 to $300 (Rp5.000.000) per month.

A system is a framework that:

• Is replicable and teachable.
• Removes guesswork from training decisions.
• Can be personalized without external help.
• Costs $0 (or the price of understanding it).

As a busy professional, I don't have the bandwidth for a coach. But I have the intellectual capital to understand training systems. I have the time to document what works. And I have the obsession to test it rigorously.

This is what a system gives you: the ability to adapt to your reality.

Because life isn't static. Work stress spikes. You get injured. You travel. Your schedule changes. A fixed training plan breaks under this complexity. But a system you understand can flex.

When my work spiked in August 2025, I didn't abandon training. I reduced intensity while maintaining volume. I ran 80% easy runs instead of 60%. My fitness didn't decline. It actually improved because I managed stress better.

A coach's plan would have said: "Follow this or don't." My system said: "Adapt while maintaining the principles."

There is a moment that happens around kilometer 80 of an ultra trail race. Your legs feel like concrete. Your mind is screaming. The pain isn't sharp anymore; it is dull and omnipresent, as if your body is slowly surrendering to physics.

I hit that moment three times in 2025.

Three ultra trails in eight weeks. Three 100-kilometer races. Three times I convinced myself that my legs would keep moving when my brain insisted they were finished. Three times I discovered something I did not know about myself.

But here is what surprised me most: it was not the ultramarathon that changed me. It was the realization that everything I had learned as a business technologist, including every framework, system, and principle I built while running my company, applied directly to running 100 kilometers through mountains.

This is my origin story in running.

BDG Ultra 2025 - My first 100K

The Desk-to-Trail Transition

My name is Anggriawan Sugianto. I am the Chief of Suitmedia, a digital consulting firm in Jakarta with over 200 employees. I spend most days in optimizing workflows, analyzing spreadsheets, and making decisions that affect growth.

I also run 100-kilometer races through mountains.

These two facts may seem disconnected, but they are not. They represent the same skill applied to different domains.

In 2023, I started running seriously. I do not mean the casual 10-kilometer runs often seen on social media. I mean distance: the kind that takes hours, demands total consistency, and reveals your true character.

At first, it was for health. Then it became a test. Finally, it became an obsession with understanding how systems work.

Most people who run endurance distances follow one of two paths:

1. Outsourced: Hire a coach, pay the fee, and follow the plan.
2. Amateur: Download a generic plan from the internet and hope for the best.

Both approaches assume you need an external structure or that you cannot think for yourself. I rejected both.

As a strategist, I have spent a decade learning to think in systems. I build products using frameworks. I make hiring decisions using matrices. I structure companies around principles rather than hunches.

It seemed illogical to abandon that mindset the moment I wanted to run 100 kilometers.

In late 2024, I decided to become my own coach.

This was not due to arrogance, but because I had a unique advantage: the ability to reverse-engineer the system. I had the time to test hypotheses and document what actually works.

By 2025, I had proven the system works.