A More Intentional Way Into 2026 | The Monthly Reset, December 2025

Oscar Trelles

Author of The Human OS Manual · Founder of Breathing Flame

02 Dec 2025·5 min read

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Reset Insight Embodied Practice Science Snapshot 2025 in Review: A Year of Impact Resources of the Month Turning Resolutions Into Action Upcoming Events

The end of the year naturally slows our pace, not to stop us, but to help us notice. Notice what worked, what didn’t, what quietly sustained us, and what quietly depleted us.

Reflection is only useful when it leads to clarity. And clarity is only useful when it leads to action. So before setting big resolutions for 2026, this month’s Reset invites you to pause long enough to ask:

What gave you energy this year?
What took it away?
What deserves a place in the new year, and what doesn’t?

This issue is designed as a chance to celebrate the year, reset your rhythm, and start 2026 aligned rather than overloaded.

And as you read this, I’m in Berlin meeting with leaders who are asking a similar question about their teams: How do we walk into 2026 more resilient, not more depleted? The answers are surprisingly simple and the same for all of us.

Reset Insight

Longevity for All: Rethinking Healthspan as a Collective Goal

Scroll through LinkedIn and you’ll see the same narrative over and over again: new longevity clinics in Zurich, “cellular rejuvenation suites” in Dubai, founders getting lab tests that cost more than most people’s annual income.

The message is subtle but powerful: longevity is something you buy. Healthspan is something reserved for those who can afford full-body MRIs, biomarker panels, and week-long revitalization programs.

But pause for a moment. As we look back on this year: the decisions you made, the energy you protected, the habits that sustained you, ask yourself:

Did any meaningful improvements come from luxury interventions? Or did they come from consistency, awareness, and small commitments that actually fit your life?

Because that is the real paradox of modern longevity: the strongest tools for extending healthspan are almost entirely free.

Breathwork regulates stress. Cold water improves inflammation and metabolic function. Time-restricted eating increases repair. Movement remains one of the most powerful predictors of healthy aging. And social connection increases survival odds more than many medical interventions.

These are not luxury tools. These are human tools.

And yet the wellness industry has pulled the conversation upward, toward what sells, not what works. Meanwhile, the real longevity crisis is unfolding quietly in offices, homes, and communities where burnout is normal, sleep is fragmented, stress is chronic, and recovery is optional.

Most people are not struggling because they lack access to a cryotherapy chamber. They’re struggling because they’re navigating a life with too little space to breathe.

Read the full essay on Substack →

Embodied Practice

The 12-Hour Holiday Reset (made simple)

December usually brings heavier meals, later nights, more social pressure, and more decisions about food and drinks than any other month. Instead of fighting that reality, this month’s embodied practice is about creating a rhythm that supports your biology while still enjoying the season.

The Reset: Stop eating 3 hours before bed, and leave a 12-hour window before your next meal. Gentle. Grounding. Zero guilt.

Pair it with these small shifts for a calmer holiday rhythm:

Holiday gatherings are about connection. When you anchor on people rather than food, the pressure eases and your choices become more intentional.
Choose nourishment, not perfection. Restriction backfires. Instead, focus on satisfying foods at most meals: proteins, healthy fats, vegetables. A stable blood-sugar baseline makes cravings easier to navigate and keeps your energy steady.
Protect your bandwidth. You don’t have to attend every event. If you’re overloaded, permission to say no or not tonight is part of the reset.
Stay hydrated and keep simple snacks around. When you’re shopping for gifts, running errands, or jumping between commitments, dehydration and low energy can make decisions harder.
Choose treats with intention. Before saying yes to a drink or dessert, gently ask: Do I actually want this? If the answer is no, skip without guilt. If the answer is yes, enjoy it fully.

A simple rhythm. A calmer December. A better baseline for January.

Science Snapshot

A recent review on intermittent fasting and circadian rhythms (Bischof et al., 2025) highlights a principle especially relevant in December:

Your body doesn’t just care what you eat, it cares when you eat.

Research shows that 12–14 hour overnight fasts, combined with daytime eating and light movement, improve:

Insulin sensitivity
Inflammation
Endothelial function
Cognitive performance
Sleep quality
Morning energy

And importantly: extreme fasting windows can increase stress hormones, especially in winter.

Moderation, rhythm, and consistency outperform intensity.

Read the full study →

2025 in Review: A Year of Impact

This year, Breathing Flame:

Delivered 23 workshops across WHM, breathwork, and corporate pilots
Reached 200+ participants from at least 12 different countries
Collected 101 five-star reviews
Launched the new breathingflame.com
Expanded our weekly breathwork community
Launched this newsletter, with plans for a monthly digest for business leaders in the new year.

Thank you for being part of this journey!

Resources of the Month

Interview with Karen Jacobson: Nourishment, Timing, and Healthspan

Karen is a functional medicine practitioner and Head of Nourishment for the Reverse Aging Challenge. In this interview, she shares how she moved beyond “calories in, calories out” toward a deeper, science-informed view of nourishment, timing, and gut health.

Learn about: