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30 years of research. Refined by Europe's elite athletes. Now ready for you.

30 years of HRV research with universities and pro athletes. 1M+ measurements collected with thousands of elite athletes, turned into a product for everyone.

2017

Radim Slachta founded mySASY to help athletes push past their limits

After 20 years of researching HRV and its use in sport, Radim founded mySASY with the ambition to bring his unique training management method to the world.

2019

The most accurate measurements. The most accurate results.

mySASY gained its first thousands of clients and ambassadors who considered the technology their secret weapon. However, a trainer was still needed to interpret the data and unlock its full potential.

2021

Radim teamed up with a young entrepreneur, Vojta

Radim teamed up with Vojta to bring the most accurate measurements beyond elite athletes. Now, anyone who's even a little active can use the results to improve their physical and mental well-being.

2023

It's here! Elonga is born.

For anyone who wants to understand how their body is doing and live healthier - easily, in 3 minutes, from the comfort of home, and without needing a coach to explain the results.

30 years of research. Refined by Europe's elite athletes. Now ready for you.

30 years of HRV research with universities and pro athletes. 1M+ measurements collected with thousands of elite athletes, turned into a product for everyone.
Timeline illustration image

1996

Spectral HRV analysis: the gold standard, locked in a lab.

Co-founder Radim Šlachta, then a university student, was fascinated by spectral HRV analysis. Extremely accurate, but only possible in a lab. Patients had to lie down, then stand up. The test took 20 minutes. Radim ran his first measurements on his classmates.
Visualisation of research data

1996–2016

20 years of research.

For two decades, Radim dedicated himself to physiology research, including collaborations with the WHO, exploring how spectral analysis could guide a healthier lifestyle.

2017

mySASY: bringing the science out of the lab.

Radim founded mySASY with one ambition: take spectral analysis out of the lab and into the field, at scale.
Timeline illustration image

2019

Adopted by Europe's elite.

mySASY's accuracy spoke for itself. F1 drivers, Premier League footballers, record-setting runners, and biathletes started using it.

2022

The 20-minute test, compressed to 3.

After collecting 1M+ research measurements, Radim partnered with Gauss Algorithmic, a leading Czech machine learning firm, to break the biggest barrier: a 20-minute lab protocol that required standing, impossible to do during sleep. The dataset made it possible. The test compressed to 3 minutes. Why 3 minutes

2023

Elonga is born

Radim partnered with young entrepreneur Vojta to bring the breakthrough out of elite sport and into people's homes. Finally, a product for you, after 30 years.

2026 — US launch

Elonga arrives in the US.

20,000 European customers. On April 20, 2026, Elonga launched in the United States.
Reference

Naši spokojení zákazníci a ambasadoři

MyAge je můj trenér v kapse. Poradí mi, kdy můžu při tréninku zabrat, kdy naopak zvolnit. Minimalizoval jsem tak zranění.

Ján Volko
,
Atlet, mistr Evropy

MyAge mi pomáhá hlídat správnou míru odpočinku. Je to pomocník na každý den.

Jiří Hlavenka
,
podnikatel

Správný pohyb je nejefektivnější cestou k pevnému zdraví a životnímu štěstí.

František Frištenský
,
potomek Gustava Frištenského

Nestačí jen bezhlavě trénovat. Jsou potřeba data a ty mám stále k dispozici.

Romana Gajdošová
,
Triatlonistka, 5x mistryně ČR
WHERE THE RESEARCH HAPPENED

Hundreds of clubs. Thousands of athletes. One dataset.

Over 6 years, mySASY was deployed at hundreds of leading European sports clubs. They became the research ground that built the HRV dataset behind Elonga.

The research is on your bedside table.

Available in the US since April 20. Built on 30 years of European research.
How can Elonga be accurate when it's only 3 minutes in the morning?
We use an advanced proprietary algorithm developed by our Co-Founder, Dr. Radim Šlachta, trained on 3M+ HRV measurements collected over 30+ years of research with MySASY - a 20-minute wearable developed by Dr. Šlachta, used by pro-athletes all across Europe.

This way, we’re able to predict how the remaining 17 minutes of the measurement would look, all without losing accuracy. You can find more info about the technology at elonga.com/3-minutes
How does Elonga differ from Whoop or Oura?
Elonga offers you clear, actionable, and non-invasive insights into your health, without having to wear it 24/7. Every feature is included because it moves the needle on healthspan, nothing else. That way, you actually get to see what’s best for you, all without overcomplicated data.

We also break down the state of your autonomic nervous system into metrics, so you can actually understand your body better. You’re able to see the current state of both the sympathetic and the parasympathetic branches of your ANS.
Why not just use a smartwatch?
If you have a smartwatch like the Apple Watch, Samsung Watch, and are considering using the Elonga sensor, check out elonga.com/smartwatch, where we cover the subject in detail.

Smartwatches track your activity during the day, like steps, calories, and workouts. Elonga measures your body’s internal state each morning - stress, recovery, and readiness. All of this data, including the data from your smartwatch, is combined to create a personalized movement plan for the day.
Can Elonga really help me decrease my functional age?
Yes, over 60 % of people who bought Elonga have seen a significant decrease in their functional age. All of the features are designed to show personalized and data-based insights and guide you on your longevity journey.
Can I trust the recommendations Elonga gives me?
Every feature Elonga includes has been thoroughly tested and validated by our Co-Founder, Dr. Radim Šlachta, a leading researcher in HRV science. That means the data you see isn't just numbers. It's real insights we can stand behind, built on research we trust ourselves.
Does the app compromise user privacy?
No. We never share your data with anyone, and it’s securely stored. You can also delete your account and all associated data at any time.

Start taking care of your body today to stay fit as you age.

Avoid lifestyle diseases, illness, and injuries.
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