Hey LessWrong,

After sharing early results at Less Online this summer (thanks for the feedback during the strength training demos), I'm recruiting for a LessWrong team in the 2025 Unaging System Challenge. What started as helping one friend who got winded climbing stairs has grown into a complete system that could add two decades to our lives. The research shows we can reduce premature death risk by up to 90% through specific physical activities – and it only requires 90 minutes of structured exercise weekly.

Evidence-based health information should be freely available to everyone. This is my contribution to increasing human health and longevity—think of it as applied EA for physical optimization.

The 2025 Program (Starting January 6):

• Four 12-week challenges throughout the year
• Each challenge builds one evidence-backed longevity habit
• Starting with HIIT for cardiorespiratory fitness
• Progressing to strength, mobility, and advanced protocols
• Just 90 minutes of structured exercise weekly
• Teams grouped by community for accountability and discussion

Our first cohort included rationalists from the Japan ACX meetup and a delightful range of fitness levels – from "I get winded opening my laptop" to "I do ultramarathons between alignment debates." One participant combined shadow boxing and the Floss dance for their HIIT intervals, proving rationalists can optimize anything.

What You Need:

• Heart rate tracking (Apple Watch, Oura, Whoop, Fitbit kinda thing)
• Three 30-minute exercise sessions weekly during building phases
• Two sessions weekly for maintenance
• Willingness to track metrics (love data)

Register here to join the LessWrong team: https://www.unaging.com/unaging-system/

Looking forward to helping more of us live long enough to solve the control problem – or at least climb stairs without questioning our life choices.

For rationality and longevity, Crissman

P.S. For those who asked at Less Online: No, we still don't need Bryan Johnson's supplement stack.