Running changed my life.

What started in my mid-40s as a personal challenge quickly became a deep obsession with human performance
and the science of running. I immersed myself in the philosophies of legendary coaches, studied sports physiology,
and explored every proven method for building endurance and speed.

Along the way, I became a certified Distance Running Coach through the RRCA, and began coaching and designing training plans
tailored for runners over 40 to help them maximize performance while respecting the realities of aging, recovery, and busy lives.

I’m also living proof of what’s possible as a late-starting runner who only took running seriously at 44.
At 47, I ran a 3:05 marathon. I’ve also ran both 100K and 100-mile ultramarathons.
These experiences not only shaped my own journey, but also inform how I design training that balances ambition with sustainability.

What sets my approach apart is the balance of designing precision training to maximize return on every run.
My mission is simple: to help late-starting runners unlock results they once believed were beyond their reach.
Whether that’s setting a personal record, completing a marathon, or running farther than ever before, every plan I create
is grounded in science, precision, and efficiency.

At Limitless Coaching, every training plan is personally written and designed by me.
Jusman So — Distance Running Coach and Founder