i coach the athletes that most coaches don’t know how to handle.
why i built this coaching practice
In 2013, I was diagnosed with Lupus. Suddenly, my relationship with running changed. The diagnosis was a shock to my body and my entire way of living. As someone who played sports all her life and was finally starting to fall in love with long distance running, starting over was harder than I could’ve expected.
Because I didn’t know any other runners with my diagnosis and my doctor’s couldn’t tell me how to proceed with exercise - I had to learn how to train through fatigue, manage flare-ups, and listen to my body in new ways. The journey was far from linear but that experience transformed me from a runner into an advocate.
I became a certified run coach and public health professional because I wanted to help other autoimmune athletes do what I've done: continue pursuing their running & movement goals while taking excellent care of their health. Not despite their diagnosis, but with full knowledge of it.
Today, I work with athletes navigating conditions like Lupus, Hashimoto’s, RA, Crohn’s, and more. I also coach runners at every level — from first-timers to marathoners chasing PRs — who want personalized, compassionate coaching that meets them where they are.
Ready to get started? Book your free coaching intro call today!
Education & Certifications
B.S. in Exercise Science
Masters in Public Health (MPH)
USATF Level 1 Running Coach
80/20 Endurance Certified Coach
AIP Certified Nutrition Coach
Training Peaks Certified
Coaches Collective & COCI Alumni
Running achievements
14 Marathons & Counting
Numerous Half Marathon Finishes
50k–100k Ultra Finisher
First Black woman to run Boston to NYC - 200 miles in 11 days
“The Speed Project” LA → Vegas relay participant
Mireille is one of small number of voices in the endurance world speaking directly to the intersection of autoimmune health and athletic performance - from research-backed coaching strategy to lived experience on the starting line.
speaking & curriculum work:
AIP Summit — January 2026
Presentation
"From Flare to Finish Line: Redefining Strength for the Autoimmune Athlete" — A presentation on how autoimmune athletes can reframe strength, build sustainable training habits, and stop measuring progress against a pre-diagnosis baseline.
Link: aipsummit.com
Skadi Sports Psychology Athlete Summit — January 2025
Presentation
"Training Strategies for Athletes with Complex Health Challenges" — Practical frameworks for coaches and athletes on adapting training when health variables are unpredictable.
Link: skadisports.com
Feisty Endurance Certification
Curriculum Contributor
Module: "Training Female Endurance Athletes Living with Autoimmune Considerations" — Developed for endurance coaches on how to adapt programming, communication, and goal-setting for athletes managing autoimmune conditions.
as heard on:
Invisible Strength
“Chasing Goals, Not Ghosts: Mireille Siné on Running 200 Miles with Lupus” · June 2026 · 36 min
Mireille shares her full story — from a Lupus diagnosis that landed her in the ICU in college to running 200 miles from Boston to NYC. She breaks down her stoplight protocol for training around flares, how she distinguishes fatigue from the start of a flare, and the mindset shift behind “chasing goals, not ghosts.”
Link: https://open.spotify.com/episode/35Yeoi9RoxAn7GEzGwyT0a
Feisty Women’s Performance
“Why “Push Through It” Is the Worst Advice for Autoimmune Athletes” · July 2026 · 1 hr 6 min
Mireille joins Dr. Erin Ayala to discuss the “double load” autoimmune athletes carry, how to build flexible training plans that account for flares and fatigue, and why performance is about more than pace, PRs, and finish lines.
Link: https://open.spotify.com/episode/7j8K0es5B8oveUUqCCHCd3
Training Athletes with Autoimmune Conditions: My Approach
Whether you’re managing a health condition or simply chasing your next goal, here’s what coaching with me looks like:
**Personalized Pacing: Your training intensity adapts to how you're feeling, accounting for flare-ups and inflammation levels.
**Recovery-First Mindset: Rest isn't weakness—it's strategic. We build recovery into your plan proactively.
**Nutrition Support: As a Certified AIP Practitioner, I can guide you through anti-inflammatory nutrition strategies that support training.
**Realistic Goal-Setting: We set ambitious goals that honor your health, not fight it.
**Constant Communication: Your body talks—I teach you to listen, and we adjust your plan accordingly.
Your Next Step: Let’s See If We’re a Match
Curious to see if we'd click? Let’s jump on a free introduction call and lets chat about your goals.