 ROS™ PROGRAMS
Built on the #1 Biological Process That Increases Flexibility
Proven in Research. Still Ignored in Practice.
100+ studies support the science behind the most powerful biological process to increase flexibility
— yet almost no programs are built around it.
Curious what it is?
Discover in the first 5 minutes of the free ROS™ Masterclass.
Proven in Research. Still Ignored in Practice.
100+ studies support the science behind the most powerful biological process to increase flexibility.
Curious what it is?
Discover in the first 5 minutes of the free ROS™ Masterclass.
What Are the ROS™ Programs?
Fully guided, evidence-based flexibility programs built on the Range Optimization System (ROS™)Â
— the first training system built entirely around the #1 biological process that increases flexibility.
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What are the
ROS™ Programs?
Evidence-based flexibility programs built on the Range Optimization System (ROS™)Â
— the first training system built entirely around the #1 biological process that increases flexibility.
Which skills are covered?
 Side Split | Front Split | Pike & Head-to-Toe | Pancake
Side Split
From just loosening your inner thigh all the way to the full side split (and beyond).
Also builds: your ability to actively open your legs to the side (hip abduction), not just passively reach that range.
Front Split
From just loosening the front and back of your hips all the way to the full front split (and past that).
Also builds:Â your active hip flexion and extension (strength through range), not just passively reaching that range.
Pike & Head-to-Toe
From simply touching your toes all the way to touching your Head-to-Toe.
Also builds:Â your active straight-leg raise strength (end-range capacity), not just passive bending.
Pancake
From comfortably sitting with your legs open to touching your abs to the floor (full pancake and beyond).
Also builds:Â your active straight-leg control from an open-leg position, not just a passive hold.
The Complete System
Achieve Overall Flexibility — Full range. Zero tightness. Every position.
Includes every program (Side Split, Front Split, Pike & Head-to-Toe, and Pancake) in one bundle, plus free access to all future programs and updates the moment they launch.
Which skills are covered?
 Side Split | Front Split | Pike & Head-to-Toe | Pancake
Side Split
From just loosening your inner thighs all the way to the full side split (and beyond).
Also builds: your ability to actively open your legs to the side (hip abduction).
Front Split
From just loosening the front and back of your hips all the way to the full front split (and past that).
Also builds:Â your active hip flexion and extension (strength through range).
Pike & Head-to-Toe
From simply touching your toes all the way to touching your Head-to-Toe.
Also builds:Â your active straight-leg raise strength (end-range capacity).
Pancake
From comfortably sitting with your legs open to touching your abs to the floor (full pancake and beyond).
Also builds:Â your active straight-leg control from an open-leg position.
The Complete System
Achieve Overall FlexibilityÂ
— Full range. Zero tightness. Every position.
Includes all current programs, plus free access to all future releases.
What's included in every ROS™ Program?
Everything you need to achieve your flexibility goals— all in one place.
The ROS™
Original Programs
 A year’s worth of training for each skill: Side Split, Front Split, Pike & Head-to-Toe, and Pancake.
The ROS™ Original Programs are fully structured and ready to go for those who want to train with our system quickly and easily.
The ROS™
In-depth Assessment
A comprehensive flexibility assessment built on the ROS™ methodology.
- Measure your current level
- Identify imbalances
- Discover what your body needs most
- Use your results to customize your program
The ROS™
Customizable ProgramsÂ
A year’s worth of customizable training for each skill: Side Split, Front Split, Pike & Head-to-Toe, and Pancake.
The ROS™ Customizable Programs offer a fully guided customization experience for those who want to delve deeper and tailor the training process to their needs.
Ongoing Support in Our New
Private Forum
Get exclusive access to our members-only forum.
Share progress, ask questions, get expert feedback, and stay accountable with a community working toward the same goals.
 100s of Exercises for
Every Level
Access a vast library of exercises, scaled for all levels. Every tutorial includes:
- Detailed technique breakdowns
- Follow-along examples
- Key guidelines to help you maximize results
High-Quality
Video Tutorials
Professionally produced video tutorials covering every aspect of your training.
From training theory on terms and fundamentals all the way to step-by-step guides on how to properly warm up or optimize recovery.Â
Bonus
The ROS Flexibility Map™
A unique tracking system developed exclusively by our team.
This innovative tool lets you visualize your exact flexibility levels across all areas, track improvements accurately, identify strengths and weaknesses instantly, and monitor your progress with precision.
The Tilt Program
Being able to tilt your hips is an essential ability for building flexibility, yet it’s rarely trained directly. That’s why we created a dedicated program to develop your capacity in this movement.
It's included as a bonus in every ROS™ Program.
Maintenance Programs
Achieving flexibility is just the beginning - keeping it for life is what matters.
Inside every ROS™ Program, you'll find dedicated maintenance protocols for each skill, guiding you from the moment you first achieve your goals all the way to lifelong retention.
What's included in every ROS™ Program?
All you need to achieve your flexibility goals.
The ROS™ Programs
ROS™ Original Program
Fully guided, ready-made programs for every skill. Train immediately, no hassle.
ROS™ Customizable Program
A customizable version of the original program — tailored to your body, your pace, your goals.
The ROS™ In-depth Assessment
A comprehensive assessment built on the ROS™ methodology.
- Measure your current level
- Discover what your body needs most
- Use your results to customize your program
Ongoing Support
Get exclusive access to our new members-only forum.
Share progress, ask questions, and stay accountable with a community working toward the same goals.
High-Quality Video Tutorials
A vast library of professional video tutorials covering everything from exercises, training theory, warm-ups, recovery and more
Bonus
Bonus Material
The ROS™ Flexibility Map™
A tracking system built exclusively by our team to monitor your progress.
The Tilt Program
Free specialty program to master the pelvic tilt — a fundamental skill for flexibility.
Maintenance Programs
Dedicated protocols for each skill, guiding you from your first touchdown to lifelong retention.
Not just a program...
but a vast library of flexibility knowledge
There’s a reason our students see incredible value in joining us. We don’t just invite you into a program—we invite you into the largest flexibility knowledge base that exists.
Not just programs
This is the largest flexibility knowledge base available.
We became flexible as adults
For many of us, this journey began as stiff adults with limited time to train — often while juggling other priorities like strength training or a busy schedule. Given that starting point, the margin for error was small, especially when working toward challenging positions like the Side Split, Front Split, or Head-to-Toe.
Looking back, it's clear that none of us succeeded by training harder than everyone else. The results came entirely from our training approach.
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We became flexible as adults
Our flexibility journey began as stiff adults with limited time for training.
Our success came entirely from our training approach.
What makes our approach
different?Â
The first programs built entirely around activating the #1 biological process that increases flexibility.
Don't know what it is?
Learn for free in the first 5 minutes of the ROS™ Masterclass.
More unique features
Benefit from 11 methods not 1 or 2
Today, there are at least 11 distinct flexibility methods, each offering unique benefits. Instead of the common practice of relying on just one or two, our approach leverages the entire methodology within a well-coordinated framework that follows a progressive structure.
Evidence-based training variables
Stretching for 15, 30, or 60 seconds matters! The same goes for the number of reps and sets, as well as the duration of your holds, contractions, and rest intervals. That’s why we left nothing to chance. The instructions in our programs follow proven protocols from hundreds of published experiments.
Unique tracking tools - Flexibility Map™
Get exclusive access to the Flexibility Map™. This unique tracking tool, developed by our team, helps you visualize your exact flexibility level across all areas, track improvements accurately, identify strengths and weaknesses instantly, and monitor your progress with precision.
Individual Assessment & Customization
Complete our step-by-step guided ROS™ Assessment to evaluate your current flexibility, gain insights into your unique needs, and customize your plan accordingly. Discover your strengths, weaknesses, and imbalances with precision.Â
What makes our approach different?Â
The first programs built entirely around activating the #1 biological process that increases flexibility.
Don't know what it is?
Learn for free in the first 5 minutes of the ROS™ Masterclass.
More unique features
Benefits from 11 methods not 1 or 2
Today, there are at least 11 distinct flexibility methods, each offering unique benefits. Instead of the common practice of relying on just one or two, our approach leverages the entire methodology within a well-coordinated framework.
Evidence-based training variables
Every detail — duration, reps, sets, rest — is backed by proven protocols from hundreds of published studies.
Unique tracking tools - Flexibility Map™
Get exclusive access to the Flexibility Map™. A unique tool that helps you visualize your exact flexibility level, track progress, identify imbalances, and stay motivated.
Original Methods & Techniques
Train with original methods and techniques developed by our team (C-PR™, A-AR™, and more). These methods extend research-based techniques and bridge the gap between active-centered and passive-centered methodologies.
Individual Assessment & Customization
Complete our step-by-step guided ROS™ Assessment to evaluate your current flexibility, gain insights into your unique needs, and customize your plan accordingly. Discover your strengths, weaknesses, and imbalances with precision.Â
What about mobility?
Our programs completely cover what is often referred to as mobility, but for several reasons (explained below), we choose not to use this term.
Why don't we use the term mobility?
The Misunderstood Term
Flexibility is divided into two types: active and passive.
- Passive flexibility (Passive ROM) refers to the range of motion you can achieve with support or assistance.
- Active flexibility (Active ROM) is the range you can move using your muscles' strength alone.
Therefore, a flexible person has both active and passive flexibility, or both passive and active ROM. These terms have been used in scientific literature and sports for decades.
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Mobility: The New Trend
Recent fitness trends have redefined mobility to describe active flexibility while reserving flexibility for passive movements. However, this creates confusion for several reasons:
-
First, to have any level of active flexibility, you must also have equal or greater passive flexibility. Therefore, using mobility to describe active range inherently includes passive flexibility, making the term flexibility redundant. So why not use the term flexibility instead?
-
Then, even if mobility is reserved for active flexibility and flexibility for passive movements, it’s still misleading. Someone with a good active range of motion is, by definition, also flexible.
-
Lastly, in scientific literature, mobility usually refers to post-injury recovery or improving movement in older adults. The preferred terms for flexibility are active and passive ROM.
In short, it’s confusing.
For all these reasons, we avoid using the term mobility and stick to the well-established term flexibility to describe both active and passive abilities.Â
 ACTIVE FLEXIBILITY = MOBILITY
Meet your instructor
Â
If you were searching for someone qualified to review the 1,000+ existing flexibility studies, test every practice, and condense it all into a straightforward methodology, that someone would be Yiannis.
Credentials
- Yiannis graduated in Sports Science with the highest grade in the 40-year history of his department.
- He has received two awards for academic excellence at Aristotle University.
- He completed his Master’s in Human Performance and Health as valedictorian.
- He is the only international flexibility coach with published scientific research in the field.
- In his research, he was among the first to examine how hypocapnia-induced alterations in spleen volume affect the oxidative system.
- He has taught more than 30 seminars on the science of flexibility training across 10 countries.
Yiannis entered the world of flexibility with a clear mission: to discover not just how he could become flexible, but how to build a system that works for everyone—a project that took him years to complete.
Today, the product of his work, the ROS™ Programs, is used by thousands worldwide to achieve full freedom of movement.
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What they say about Yiannis
Meet your instructor
 If you were searching for someone qualified to review the 1,000+ existing flexibility studies, test every practice, and condense it all into a straightforward methodology, that someone would be Yiannis.
Credentials
- Yiannis graduated in Sports Science with the highest grade in the 40-year history of his department.
- He has received 2 awards for academic excellence (EGVE & AUTH).
- He completed his Master’s in Human Performance and Health as valedictorian.
- He is the only international flexibility coach with published scientific research in the field.
- He has taught more than 30 seminars on the science of flexibility training across 10 countries.
Yiannis entered the world of flexibility with a clear mission: to create the most evidence-based flexibility training system —a project that took him 9 years to complete.
Today, the product of his work, the ROS™ Programs, is used by thousands worldwide to achieve full freedom of movement.
What they say about Yiannis
Frequently Asked Questions
Â
Is this program beginner-friendly?
Yes. Our program is designed to support all experience levels, from complete beginners to advanced practitioners refining their flexibility.
Whether you’re just starting out or working toward higher-level mobility goals, our structured approach meets you where you are and helps you progress safely and effectively.
Do I need any equipment?
No equipment is required. Our programs are designed to be minimal and accessible. However, for those who’d like to enhance their experience, we recommend optional tools such as a tape measure and sliders, which are available at minimal cost. Instructions for using these accessories are included in the programs.Â
How much time will I need to commit to this program?
The program can be tailored to fit your schedule. You can train anywhere from one to three sessions per week. Even a single session per week can deliver noticeable results, while increasing the frequency can accelerate progress.
Many students find two sessions per week to be the ideal balance. The Training Theory section provides detailed guidance to help you determine the optimal number of sessions based on your recovery and progress.
Is this program a one-time purchase?
Yes! A single purchase gives you full access to the program, including all future updates at no additional cost.
Why did we split the Side Split & Pancake program into separate programs?
We previously used the Side Split as a key exercise to assist the Pancake, and vice versa, with tremendous results. That's why we offered them in one program: the Side Split & Pancake. But why did we separate them into two programs now?
We successfully accommodated a series of demands—including your requests—as presented in detail below. After an extensive testing period, our newly designed separate programs address all the requests and limitations we identified and provide an even more effective path to success.
Â
Let's break down all the reasons here:
- Narrow vs. Wide Pancake
First, not all pancakes are created equal. Depending on your goal, you might aim for a different position. Some consider the "pancake" to be the wide-stance version (which we've been training so far), but others need a narrower-width version that looks more like a pike.
Here's the key: the wide version relies heavily on the adductors and is the one that helps progress on the side split. In contrast, the narrow-width pancake emphasizes hamstring flexibility and has very little to do with the side split.
We noticed that different people have different meanings for this position, and we wanted to build a program that accommodated the entire spectrum. The new standalone ROS™ Pancake program does exactly that, covering all versions of the pancake.
Â
- We Heard You
Many of you simply didn’t want to train one or the other, and we get it. We wanted to give you the option to train only what you want. Many owners of the combined program reached out, saying they were only interested in one of the two components, asking us to create separate versions. We heard you, we did the work, and the current programs are a direct result of answering your needs.
Â
- Effectiveness
Will you see the same results? Our main concern when we started thinking about separating the programs was preserving the same level of effectiveness. We spent over a year testing and experimenting with the new separated protocols to make sure they could deliver the same or better results. We believe we overdelivered on this task.
The new programs not only deliver the same results but, from our testing, have delivered even greater results thanks to the integration of advanced Range Optimization System™ methods,, combined with modifications to both qualitative and quantitative training parameters.
Â
- Time Efficiency
With effectiveness confirmed, we can now train each skill separately, which saves significant time per session and total training time for those who want to focus on just one skill.
Â
- Better Support for Very Tight Individuals
For those starting very tight, we wanted to build a more gradual introduction to the Side Split & Pancake. This required more time per session and specialized drills, which we couldn't include in the original combined program as they made the sessions longer and time-inefficient. The new standalone programs successfully include all these elements, making them ideal for all training levels.Â
Â
Overal we like to think that your feedback shaped these programs. We hope you can see the effort, dedication, and care we put into not just hearing your requests but overdelivering on them. This is what happens when we build together. We hope to see you inside.
Frequently Asked QuestionsÂ
Is this program beginner-friendly?
Yes. Our program is designed to support all experience levels, from complete beginners to advanced practitioners refining their flexibility.
Whether you’re just starting out or working toward higher-level mobility goals, our structured approach meets you where you are and helps you progress safely and effectively.
Do I need any equipment?
No equipment is required. Our programs are designed to be minimal and accessible. However, for those who’d like to enhance their experience, we recommend optional tools such as a tape measure and sliders, which are available at minimal cost. Instructions for using these accessories are included in the programs.Â
How much time will I need to commit to this program?
The program can be tailored to fit your schedule. You can train anywhere from one to three sessions per week. Even a single session per week can deliver noticeable results, while increasing the frequency can accelerate progress.
Many students find two sessions per week to be the ideal balance. The Training Theory section provides detailed guidance to help you determine the optimal number of sessions based on your recovery and progress.
Is this program a one-time purchase?
Yes! A single purchase gives you full access to the program, including all future updates at no additional cost.
Why did we split the Side Split & Pancake program into separate programs?
We previously used the Side Split as a key exercise to assist the Pancake, and vice versa, with tremendous results. That's why we offered them in one program: the Side Split & Pancake. But why did we separate them into two programs now?
We successfully accommodated a series of demands—including your requests—as presented in detail below. After an extensive testing period, our newly designed separate programs address all the requests and limitations we identified and provide an even more effective path to success.
Â
Let's break down all the reasons here:
- Narrow vs. Wide Pancake
First, not all pancakes are created equal. Depending on your goal, you might aim for a different position. Some consider the "pancake" to be the wide-stance version (which we've been training so far), but others need a narrower-width version that looks more like a pike.
Here's the key: the wide version relies heavily on the adductors and is the one that helps progress on the side split. In contrast, the narrow-width pancake emphasizes hamstring flexibility and has very little to do with the side split.
We noticed that different people have different meanings for this position, and we wanted to build a program that accommodated the entire spectrum. The new standalone ROS™ Pancake program does exactly that, covering all versions of the pancake.
Â
- We Heard You
Many of you simply didn’t want to train one or the other, and we get it. We wanted to give you the option to train only what you want. Many owners of the combined program reached out, saying they were only interested in one of the two components, asking us to create separate versions. We heard you, we did the work, and the current programs are a direct result of answering your needs.
Â
- Effectiveness
Will you see the same results? Our main concern when we started thinking about separating the programs was preserving the same level of effectiveness. We spent over a year testing and experimenting with the new separated protocols to make sure they could deliver the same or better results. We believe we overdelivered on this task.
The new programs not only deliver the same results but, from our testing, have delivered even greater results thanks to the integration of advanced Range Optimization System™ methods,, combined with modifications to both qualitative and quantitative training parameters.
Â
- Time Efficiency
With effectiveness confirmed, we can now train each skill separately, which saves significant time per session and total training time for those who want to focus on just one skill.
Â
- Better Support for Very Tight Individuals
For those starting very tight, we wanted to build a more gradual introduction to the Side Split & Pancake. This required more time per session and specialized drills, which we couldn't include in the original combined program as they made the sessions longer and time-inefficient. The new standalone programs successfully include all these elements, making them ideal for all training levels.Â
Â
Overal we like to think that your feedback shaped these programs. We hope you can see the effort, dedication, and care we put into not just hearing your requests but overdelivering on them. This is what happens when we build together. We hope to see you inside.
You are not aloneÂ
Â
Join the ROS™ Overall Flexibility bundle and gain access to our new members-only forum.Â
Share your wins, ask questions, get expert feedback, and stay motivated with people on the same journey.Â
You are not alone
Members-Only Forum (New!)
Join us on the new members-only forum.Â
Share your wins, ask questions, get expert feedback, and stay motivated with people on the same journey.Â
Choose Your ROS™ Program
Individual Skill Programs
$149
One-Time Payment:
-
The ROS™ Original Program
-
The ROS™ Customizable Program
-
The  ROS™ In-Depth Assessment
-
100s of high-quality video tutorials covering exercises and training theory.
Bonus:
Individual Skill Flexibility Map™, Pelvic Tilt Program, Maintenance Programs, and more.
Pick a skill:
Side Split | Front Split | Pike & Head-to-Toe | Pancake
ROS™ Overall Flexibility
— Early Bird Bundle
$596 →$397 Â
One-Time Payment:
-
Side Split ($149)
-
Front Split ($149)
-
Pike & Head-to-Toe ($149)
-
Pancake ($149)
-
Early Bird Access to all upcoming programs: Shoulders, Bridge & more ($149 each)
-
Access to the New Members-Only Forum (Priceless Support)
-
200+ exercises scaled for all levels, 50+ high-quality video tutorials, and 250+ PDFs
Bonus:
- Everything included in the Individual Skill Programs
- Overall Flexibility Map™
- All future updates
The ROS™ Masterclass
FREE
Flexibility Education
What you'll learn:
-
In the first 4 minutes of the class:
The #1 biological factor that determines flexibility in the human body (confirmed by 100+ studies) -
 Next, the Proof (Explained Simply)
All the research broken down in plain language — no dense jargon, just the evidence laid out clearly. - Finally, how to use it
The exact methods to use in your own practice.
Choose Your ROS™ Program
Individual Skill Programs
$149
One-Time Payment:
-
The ROS™ Original Program
-
The ROS™ Customizable Program
-
The  ROS™ In-Depth Assessment
-
100s of high-quality video tutorials covering exercises and training theory.
Bonus:
Individual Skill Flexibility Map™, Pelvic Tilt Program, Maintenance Programs, and more.
Pick a skill:
Side Split | Front Split | Pike & Head-to-Toe | Pancake
ROS™ Overall Flexibility
— Early Bird Bundle
$596 →$397 Â
One-Time Payment:
-
Side Split ($149)
-
Front Split ($149)
-
Pike & Head-to-Toe ($149)
-
Pancake ($149)
-
Early Bird Access to all upcoming programs: Shoulders, Bridge & more ($149 each)
-
Access to the New Members-Only Forum (Priceless Support)
-
200+ exercises scaled for all levels, 50+ high-quality video tutorials, and 250+ PDFs
Bonus:
- Everything included in the Individual Skill Programs
- Overall Flexibility Map™
- All future updates
The ROS™ Masterclass
FREE
Flexibility Education
What you'll learn:
-
In the first 4 minutes of the class:
The #1 biological factor that determines flexibility in the human body
— confirmed by 100+ studies. -
 Next, the Proof (Explained Simply)
All the research broken down in plain language. - Finally, how to use it
The exact methods to use in your own practice.
Ongoing Support
Expert help when you need it
120-Day Money Back
Love it or your money back
One-time Payment
No subscriptions or hidden fees
