Helping Runners Train Smarter, Stay Strong, and Cross Finish Lines with Confidence

A woman with glasses and long braids sitting on a stool, smiling and laughing. She is wearing a striped shirt over a black top and gray jeans, with a white watch and rings.

I’m Mireille Siné, a certified running and strength coach specializing in supporting runners, from beginners to marathoners, who want a training plan that truly fits their life, health, and goals.

Running has always been part of my life: from sprinting in high school track to completing 13+ full marathons, ultras, and iconic expeditions like Boston to NYC (200 miles in 11 days) and The Speed Project (LA to Vegas).

In college, a degree in Exercise Science introduced me to the mechanics and mindset of running. Later, a Lupus diagnosis reshaped my path and I learned to transform setbacks into strengths. Now, as an autoimmune athlete myself, I guide others through whole-person coaching that honors both their aspirations and their bodies.

Meet Mireille: Your Coach & Ally

A woman with braids, glasses, and athletic clothing crouching on the floor, tying her pink running shoes in a brightly lit room with shadows on the beige wall.
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My Coaching Philosophy

Personalized & Sustainable
Every plan is tailored to your schedule, goals, and health journey—no cookie-cutter templates.

  1. Run + Strength Fusion
    I integrate strength training to boost performance, reduce injury risk, and build resilience.

  2. Recovery & Balance First
    My approach centers on smart progression, not punishment, keeping you moving long term.

  3. Support That Goes Beyond Plans
    I’m here for check-ins, race strategy, mental resilience—together, we tackle your journey, not just the workouts.

Credentials & Notable Accomplishments

Education & Certifications

  • B.S. in Exercise Science

  • Master’s in Public Health

  • USATF Level 1 Running Coach

  • 80/20 Endurance Certified Coach

  • Training Peaks Certified

  • Coaches Collective & COCI Alumni

Running Achievements

  • 13+ Marathons

  • 50k–100k Ultra Finisher

  • “Boston to NYC” 200-mile run

  • “The Speed Project” LA → Vegas relay

Who I Work With

  • First-time race runners looking for safe, effective training

  • Marathoners seeking smarter, injury-free mileage building

  • Athletes training while balancing autoimmune or health concerns

  • Busy professionals wanting a coach who adjusts to their life - not the other way around

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Personal Side

(Why It Matters)

When I'm not coaching or logging miles, you’ll find me connecting with fellow runners on Instagram, IRL runs, or crafting helpful content to make training feel joyful and sustainable. Coaching goes beyond workouts for me - it’s about community, empowerment, and celebrating strength in every form.

Most people think hiring a run coach means just getting a training plan. But the truth? A plan alone won’t get you where you want to go. What actually gets you results: ✅Personalized programming built for your goals, body, and schedule ✅ Acco
Hey! I’m Mireille 👋🏿 I became a run coach because I’ve been where you are: confused by random plans, frustrated by slow (or no) progress, and wondering why running sometimes felt harder than it should. 🏃🏿‍♀️‍➡️ Here’s

Your Next Step: Let’s See If We’re a Match

Curious to see if we'd click? Let’s jump on a free strategy call and chat about your goals.