The Reverse Aging Challenge LogoThe Reverse Aging Challenge

A place where your system can finally settle

Grounded entry into the Reverse Aging Challenge. Quiet hillside between Málaga and Marbella: lower friction, steadier rhythm, and change that can last.

March 21 - March 27, 2026Past edition

This cohort has concluded. Dates are for reference. Browse upcoming editions for the next opportunity.

Highlights

  • Daily guided practices in breath, food timing, movement, and cold/heat, introduced gently and reinforced through repetition
  • A small, supportive cohort with direct access to coaches throughout the stay
  • A setting designed to remove distraction, urgency, and decision fatigue
  • Chef-supported Mediterranean meals that support metabolic ease and calm evenings
  • Comfortable glamping accommodations built for sleep, recovery, and nervous system downshift
Karen J.

"From the minute I walked through the gate, I felt I was in a safe space where I could just leave baggage at the door. I haven't thought about all the things that were keeping me in that fearful state. In fact, a lot of the things that scared me before I came here don't feel so scary anymore."

Karen J.Participant

Field report

Structured observations from this edition, not a clinical trial.

This note summarizes what we observed during and after the March 2026 cohort in Guaro. It is not a clinical study. It is a structured recap of program delivery, participant reflections, and practical lessons we are carrying into future editions.

Cohort context

The March edition brought together a small cohort at Costa del Soul in the hills outside Málaga. Participants arrived with different reasons for being there: stress, transition, loss of rhythm, curiosity, physical reset, and the sense that their usual tools were no longer enough.

That range mattered. The week was not designed around one outcome. It was designed around restoring conditions: breath, food timing, movement, cold, heat, sleep, conversation, and enough space for the nervous system to stop defending itself.

Program structure

The rhythm of the week was deliberately simple. Mornings created structure through breathwork, movement, and guided practice. Meals supported metabolic steadiness without turning food into a source of control. Cold and heat exposure were introduced progressively, with safety, consent, and regulation prioritized over performance.

The middle of the day left room for rest, journaling, informal conversation, and integration. Evenings were kept quieter, because the program was not only about what participants could experience during the day, but about whether their systems could settle at night.

What participants reported most often

The strongest theme was not intensity. It was reconnection.

Several participants described feeling their bodies again in a way they had not experienced for years. Others noticed that the cold became less about endurance and more about trust. Breathwork gave many of them a practical way to interrupt stress before it became a spiral.

The most meaningful shifts were often subtle: sleeping more deeply, feeling less reactive, eating with more awareness, laughing more easily, asking better questions, or realizing that discipline does not have to feel punitive.

Practices participants were most likely to continue

The practices most likely to continue were the ones that mapped easily onto real life.

Breath protocols during moments of stress.

Short cold exposure at home.

Earlier or simpler eating windows.

Walking.

Evening downshifts.

More deliberate use of heat.

Participants were less interested in recreating the retreat perfectly and more interested in taking home a usable operating rhythm.

That became an important lesson: integration improves when practices are small enough to survive contact with ordinary life.

Re-entry friction points

The first two weeks home made the real work visible.

Travel fatigue, inbox pressure, family rhythms, social meals, and old environmental cues were the main sources of friction. The challenge was not that participants lacked motivation. It was that their home systems were designed around different defaults.

This confirmed one of the central premises of the program: behavior change does not fail only inside the person. It often fails at the interface between the person and their environment.

Lessons for future editions

The March edition made clear that the retreat itself is only the first layer.

For future editions, we are strengthening the re-entry architecture: clearer written summaries during the week, more explicit links between each practice and daily-life application, and an optional post-edition accountability touchpoint after participants return home.

We are also tightening the relationship between heat, cold, sleep, and recovery so participants understand not only what each practice does, but when and why to use it.

What we are changing for October 2026

The October edition will keep the same core structure: small cohort, natural protocols, progressive exposure, guided integration, and the Costa del Soul environment.

The main evolution will be clearer translation from experience to practice. Less information in the abstract. More direct connection between each protocol and the real moments where participants need it: the stressful email, the disrupted night, the social meal, the return to work, the moment when old patterns begin to reassert themselves.

The goal is not to create dependence on the retreat environment.

The goal is to help participants leave with a system they can actually live inside.

Individual experiences vary. Nothing here diagnoses, treats, or promises a medical outcome.

How this edition ran

Program Structure

  • Morning practices to establish rhythm and physiological readiness
  • Midday space to rest, integrate, or work remotely if needed
  • Structured training sessions introduced progressively
  • Nourishing meals that support energy during the day and calm at night
  • Evenings designed for downshift, sleep quality, and recovery

Daily Rhythm

Morning

Guided practices to establish rhythm and physiological readiness

Midday

Structured training sessions introduced progressively

Afternoon

Time for integration, rest, or remote work if needed

Evening

Nourishing meals and downshift designed for sleep quality

The Humans Behind the Challenge

This is not a spa retreat.
It is a high-touch reset led by practitioners who live the work they teach.

Oscar Trelles

Oscar Trelles

Program Director

Founder of Breathing Flame

Entrepreneur, investor, systemic coach, and author of The Human OS Manual. Leads curriculum and facilitation with an integration-first lens shaped by rebuilding his health and metabolic rhythm after high-pressure years, without gimmicks.

I want you to be so fit and healthy, that food and pharma companies can't profit from you.

Karen Jacobson

Karen Jacobson

Head of Nourishment

Accredited Nutritionist

Practical lens on fasting, metabolic resilience, and whole-food habits participants can sustain after they leave the mountain. Aligns teaching with kitchen execution so plates and snacks reflect what is covered between sessions.

Good food is not just fuel, it is code that gives the right messages to your body.

Brian Fland

Brian Fland

Head of Fitness

Coach and Tech-Sales Veteran

Former tech-sales leader who builds sustainable fitness around demanding calendars, travel, and altitude realities. Sessions balance strength and mobility with recovery days and mixed levels while keeping independence and confidence central.

The most important part of aging is being flexible and strong enough to remain independent

Berenice Lizeviche

Berenice Lizeviche

Head of Kitchen

International Chef

Focused on longevity-aligned menus that still feel satisfying and culturally grounded. Collaborates with nutrition and sourcing so each meal reinforces the week's themes of steady energy, digestion, and pleasure, without rigid dogma.

This edition has concluded

Thank you to everyone who joined this cohort. We publish field notes on this page when available.