 Range Optimization Systemâ˘
The new, evidence-based way to get flexible
What's included in the ROS⢠Overall Flexibility
Programs â Tools â Education
What's included in the ROS⢠Overall Flexibility
ProgramsâToolsâEducation
What you'll get
Everything you need to achieve your flexibility goalsâ all in one place.
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The ROSâ˘
Original Programs
 A yearâs 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 ROSâ˘
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 ROSâ˘
Customizable ProgramsÂ
A yearâs worth of customizable training for each skill: Side Split, Front Split, Pike & Head-to-Toe, and Pancake.
The ROSâ˘Â 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
Also Included
The ROS Flexibility Mapâ˘
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 itâs rarely trained directly. Thatâs 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 ROSâ˘Â 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 you'll get
Everything you need to achieve your flexibility goalsâ all in one place.Â
The ROSâ˘Â Original Programs
A year's worth of training for the Side Split, Front Split, Pike & Head-to-Toe, and Pancake.
The Original Programs are fully structured and ready to start immediately.
The ROSâ˘Â 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
The ROSâ˘Â Customizable ProgramsÂ
A yearâs worth of customizable training for the Side Split, Front Split, Pike & Head-to-Toe, and Pancake.
The Customizable Programs offer a fully guided customization for those who want to tailor training to their needs.
Ongoing Support in Our New Private Forum
Get exclusive access to our members-only forum.
Share progress, ask questions, and stay accountable with a community working toward the same goals.
 100s of Exercises for Every Level
AÂ vast library of exercises, scaled for all levels. Every tutorial includes:
- Technique breakdowns
- Follow-along demos
- Key guidelines
High-Quality Video Tutorials
Professional video tutorials covering everything from foundational theory to warm-ups and recovery.
Also Included
The ROS Flexibility Mapâ˘
A unique tracking system developed by our team.
- Visualize your flexibility levels across all areas
- Identify strengths and weaknesses
- Monitor your progress
The Tilt Program
Hip tilt capacity is essential for flexibility yet rarely trained directly. Our dedicated program develops this foundational skill.
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 ROSâ˘Â Program, you'll find maintenance programs for each skill.
Not just a program...
but a vast library of flexibility knowledge
Thereâs a reason our students see incredible value in joining us. We donât just invite you into a programâwe invite you into the largest flexibility knowledge base that exists.
Not just a program...
Thereâs a reason our students see incredible value in joining us. Youâre not just joining a program, but the largest flexibility knowledge base available.
We became flexible as adults
Our flexibility journey began when we were stiff adults with limited time for training. At the same time, we were deeply focused on strength training. Given our 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 is clear we did not train harder than others. Our success came entirely from our approach to training.
We became flexible as adults
Our flexibility journey began as stiff adults with limited time for training.
Looking back, itâs clear we didnât train harder than others; our success came entirely from our methodology.
What makes our approach
different?Â
Activate all 4 mechanisms that increase flexibility
The scientific literature identifies four physiological mechanisms that increase flexibility. Our methodology is built entirely on leveraging every single one of these physiological processes, targeting flexibility from every possible angle.
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. Thatâs why we left nothing to chance. The instructions in our programs follow proven protocols from hundreds of published experiments.
Unique tracking tools - Flexibility Mapâ˘
Get exclusive access to the Flexibility Mapâ˘. 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.
Original Methods & Techniques
Train with original methods and techniques developed by our team (C-PRâ˘, A-ARâ˘, 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 makes our approach different?Â
Â
Utilizes all 4 science-proven mechanisms
The scientific literature identifies 4 physiological mechanisms that increase flexibility.Â
Our methodology is grounded in these physiological processes, targeting flexibility from every possible angle.
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
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. Thatâs why we left nothing to chance. The instructions in our programs follow proven protocols from hundreds of published experiments.
Unique tracking tools - Flexibility Mapâ˘
Get exclusive access to the Flexibility Mapâ˘. 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.
Original Methods & Techniques
Train with original methods and techniques developed by our team (C-PRâ˘, A-ARâ˘, 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, itâs 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, itâs 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 from the Northern Greece Physical Education Teachersâ Association and Aristotle University.
- He completed his Masterâs 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 everyoneâa 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.
Â
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 Masterâs 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 âa 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 youâre 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 whoâd 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 demandsâincluding your requestsâas 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 didnât 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 youâre 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 whoâd 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 demandsâincluding your requestsâas 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 didnât 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 ROSâ˘Â 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 Â
- The ROSâ˘Â Original Program
- The ROS⢠Customizable Program
- The  ROSâ˘Â In-Depth Assessment
- 100s of high-quality video tutorials covering exercises and training theory.
Extras: Individual Skill Flexibility Mapâ˘, Pelvic Tilt Program, Maintenance Programs, and more.
Pick a skill:
Side Split | Front Split | Pike & Head-To-Toe | Pancake
Â
ROS⢠Overall Flexibility (Early Bird Bundle)Â
$596Â â$397Â Â
One-Time Payment
Access to All Current & Future Programs:
-
Get all current programs: Side Split ($149), Front Split ($149), Pike & Head-To-Toe ($149), and Pancake ($149).
-
Early Bird Access to all upcoming programs: Shoulders, Bridge & more ($149 Each)
-
Access to the New Overall Flexibility Members-Only Forum (Priceless Support)
-
 200+ Exercises Scaled For All Levels
-
50+ High-quality video tutorials guiding every step of the process
-
250+ PDFs featuring programs, training logs, instructions & more
Extras:
- Overall Flexibility Map⢠(+ all individual skill Flexibility Maps)Â
- Pelvic Tilt Specialty Program
- Maintenance Programs for every skill
- Exclusive discountsÂ
- All future updates
Choose Your ROSâ˘Â Program
Â
ROS⢠Overall Flexibility
- Early Bird Bundle
$596Â â$397Â Â
One-Time Payment
Access to All Current & Future Programs:
-
Get all current programs: Side Split ($149), Front Split ($149), Pike & Head-To-Toe ($149), and Pancake ($149).
-
Early Bird Access to all upcoming programs: Shoulders, Bridge & more ($149 Each)
-
Access to the New Overall Flexibility Members-Only Forum (Priceless Support)
-
200+ Exercises Scaled For All Levels
-
50+ High-quality video tutorials guiding every step of the process
-
250+ PDFs featuring programs, training logs, instructions & more
Extras:
- Overall Flexibility Map⢠(+ all individual skill Flexibility Maps)Â
- Pelvic Tilt Specialty Program
- Maintenance Programs for every skill
- Exclusive discounts
- All future updates
Individual Skill Programs
$149
One-Time Payment Â
- The ROSâ˘Â Original Program
- The ROS⢠Customizable Program
- The  ROSâ˘Â In-Depth Assessment
- 100s of high-quality video tutorials covering exercises and training theory.
Extras: Individual Skill Flexibility Mapâ˘, Pelvic Tilt Program, Maintenance Programs, and more.
Pick a skill:
Side Split | Front Split | Pike & Head-To-Toe | Pancake
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
