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 specialize in coaching athletes with conditions like:
Lupus
Hashimoto’s and thyroid conditions
Rheumatoid Arthritis
IBD (Crohn’s, Ulcerative Colitis)
Celiac Disease
And other autoimmune conditions and chronic illness conditions
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
COCI Summit — August 2023
Presentation
"Empowering the Autoimmune Athlete: Coaching Strategies for Optimal Performance & Wellbeing" — A session on building athlete-centered coaching relationships that account for the full health picture.
Link: coachesofcolor.org
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:
Women's Running Stories
"Mireille Siné: Running Marathons, Navigating Lupus" · June 2025 · 42 min
Mireille shares how her pursuit of long-distance running and a Lupus diagnosis have shaped her life and her coaching practice — and what it means to keep running far while managing an autoimmune condition.
Link: https://open.spotify.com/episode/7fzNmHLk4fazEfPEiWcRwC
Tough Girl Podcast
"Pushing Boundaries: From Lupus to Long-Distance Running, Tackling the Speed Project" · June 2024 · 47 min
A deep dive into Mireille's journey from diagnosis to ultramarathons, the Speed Project relay, and building a coaching practice around athletes the mainstream running world tends to overlook.
Link: https://open.spotify.com/episode/7w6MeHpmr0uNbyygGiKJ40
Her Guided Evolution
"Running Toward Healing: How This Running Coach Empowers Autoimmune Athletes" · June 2024 · 59 min
Mireille discusses running as an anchor practice for autoimmune athletes, how to build trust with your body through training, and the mental and emotional reality of managing chronic illness while pursuing athletic goals.
80/20 Endurance — "Lacing Up for Life"
April 2024 · 42 min
As a graduate of the Coaches of Color Apprenticeship, Mireille talks about bridging the gap between endurance sports and autoimmune awareness — and what it takes to build expertise, not just influence, in this space.
Link: https://open.spotify.com/episode/6jFf0mpPAOF9zHKR57RIZO
Training Athletes with Autoimmune Conditions: My Approach
Running with an autoimmune disease requires a different approach. Here's how I coach autoimmune athletes:
**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.