100+ Participants Already Joined The
Free Unaging Challenge
Transform your health with our science-backed longevity program, launching every 3 months.
Next Challenge Start Date: July 6 2026
Join the Unaging Challenge
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Why Join the Unaging Challenge?
Each activity is backed by science and built for real-world results — not gimmicks.
Science-Backed Interventions
Each activity is supported by rigorous research, potentially extending life expectancy by up to 20 years
Habit Building Focus
Gradual introduction of new habits, focusing on one habit every three months for lasting change.
Immediate Benefits
Feel more energetic and healthier from the start, reinforcing your new habits.
Sustainable Practices
Maintain optimal longevity with minimal time investment after the initial phase.
How the Unaging Challenge Transforms Your Longevity
To date, the Unaging Challenge has helped participants gain a combined 531 years of healthy life, driven by measurable improvements in fitness, strength, and long-term vitality.
What began as a simple question, “Can you help me get fit?”, has grown into a science-backed movement focused on making longevity practical and achievable for real people.
The Unaging Challenge bridges real-world performance with research-based methods. No extremes. No shortcuts. Just structured, sustainable habits that build energy, strength, and resilience for life.
The program runs every 3 months in limited cohorts.
Join the Next Unaging Challenge — Starting July 6
Spots fill quickly once registration opens. Reserve your place now and be part of the next intake.
But … How Does The Challenge Work?
Meet
Crissman Loomis
The Mind Behind the Unaging Challenge
I’m Crissman Loomis, a researcher and body hacker dedicated to optimizing health and longevity. The Unaging Challenge is the result of extensive research and real-world testing, designed to help you unlock your potential for a longer, healthier life.
Meet the 2025 Challengers Who Are Defying Age
After completing the 2025 Unaging Challenge, participants shared how science-backed habits transformed their daily energy, focus, and fitness. From busy professionals to new parents and retirees, every story proves that longevity isn’t reserved for athletes — it’s achievable for anyone who commits to the process.
Katie
Unaging Challenge 2025
What did you like?
“It pushed me to be more consistent with my cardio.”
What didn’t you like?
“I felt guilty when I missed a session even if it was for valid reasons (eg illness, demanding work travel)”
Are you more fit?
“I am more fit in that I can run for longer at a faster pace at a given heartrate. However I am disappointed that my resting heartrate and VO2max did not improve.”
Brandn Wilson
Unaging Challenge 2025
What did you like?
“Straightforward schedule and menu”
What didn’t you like?
“Cycle machine I used has a 1-4 HIIT menu but not 2-3, so I didn’t end up doing the latter.”
Benefits:
“50bpm RHR, rarely tire from normal physical activities, increased desire for salads”
Anna
Unaging Challenge 2025
What did you like?
“Motivational, the spreadsheet is easy to use and nice to compare with others, great place to ask questions, nice to see improvement and have the opportunity to reflect”
What didn’t you like?
“Nothing particularly comes to mind”
Benefits:
“I think my stamina increased. I played around with different types of HIIT.. bit more confidence maybe”
Gonzalo Aguirre
Unaging Challenge 2025
What did you like?
“Keeps me somehow motivated and lots of interesting info swirling in the chat”
What didn’t you like?
“Lack of more direct interaction with people… I am a team sports person”
Benefits:
“Stamina boost, less stress, and better sleep”
Frequently Asked Questions
💡 Why is the Unaging Challenge program free? +
The Unaging Challenge is a community-driven wellness initiative designed to gather insights and refine the system. Your participation contributes to ongoing research and the development of future resources.
💡 What equipment do I need to participate in the Unaging Challenge program? +
To get the most out of the program, you’ll need a heart rate tracking smartwatch to monitor your progress, a space for aerobic exercises, and access to a strength training area (either at home or at a gym).
💡 How much time do I need to invest in this program? +
The program is designed to be flexible and fit into your life without overwhelming your schedule. Typically, participants spend about 90 minutes per week on exercise and activities.
💡 What kind of results can I expect from joining the program? +
Participants have reported improved cardiovascular fitness, increased strength, better energy levels, and measurable improvements in their biological age markers.
💡 Why follow this program if I already exercise weekly? +
The Unaging Challenge goes beyond general exercise. It uses a structured, science-backed approach with specific phases targeting different aspects of longevity — cardiovascular health, strength, daily movement, and nutrition — all measured with concrete metrics to track your progress.
Ready to Transform Your Longevity?
Join 100+ participants who are already building science-backed habits for a longer, healthier life.