Unlock your longevity, with science based habits.

Focus on what matters: VO2Max capacity, functional strength, and metabolic resilience. Evidence-based training habits for your healthspan optimization. No quick fixes. No easy shortcuts.

Consistency is the key.

Most fitness apps help you track workouts. This one helps you build the demanding habit of actually showing up—week after week, even when work explodes or life interrupts.

The Mission

Most fitness advice optimizes you for your twenties and is way too specialized. The focus is on aesthetics or monoculture performance, not on a broad foundation and the quality of your years ahead.

But to thrive after your thirties, you need a strategy. Longevity training demands a different approach—one that combines strength work and cardiovascular training.

A systematic approach for progress tracking, focused on your quality of life.

This is not a casual fitness app. It is a protocol for committed health and longevity-oriented fitness enthusiasts, backed by longevity research and proven in studies around the globe.

App screenshot

The Improvement you'll gain


More muscle strength
+ 10 %
Years of life gained
+ 13
Improved sleep quality
10 %
Increased bone density
+ 2 %

The protocol

Built on science. Designed for people.

Stop following surface-level monoculture fitness programs. Prioritize healthspan and stop chasing shortcuts.
5-6 hours weekly. Measurable outcomes. Years of life to gain. Building a body engineered for decades, not seasons.

Science

Research-Backed Protocols That Work

Longevity demands hybrid training. The25Percent integrates strength and cardiovascular modalities based on peer-reviewed consensus—not trends. Every protocol targets the biomarkers proven to extend healthspan: VO2Max, metabolic resilience, functional capacity.

Focus

Train What Actually Extends Healthspan

The25Percent focuses on the pillars backed by global research to extend healthy years. Zone 2 cardio, VO2Max intervals, functional strength, and accessoiry work. Every minute moves the longevity needle.

Momentum

It's about Real Life, Not Perfection

Complete 80% of your weekly volume and stay on track. Miss a day? Adapt—not restart. This is flexibility within structure. Built for adherence over decades, not short-term transformations. It's about real life, not perfection.

Research & Insights

Latest Articles

Dive deep into the science of extending healthspan. Explore VO2Max development, hybrid training design, and metabolic optimization.

Saturday, 22 November, 2025
Hybrid training combines strength and cardio for longevity. The anti-monoculture approach to healthspan optimization—demanding but achievable with systematic protocols.
Alessandro Kraschewski

Stay in the loop

Exclusives for Founding Members

Get early access to
the longevity training app.

Join the waitlist for The 25Percent app. Four weekly training sessions combining strength and cardio, pre-planned for you. Based on protocols from longevity physicians like Peter Attia. Launch early 2026—waitlist members get founding pricing.

FAQ

Any questions?

Get it—committing to a new training protocol is a big decision. Below are the most common questions.

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