

ABOUT
PERSONAL TRAINER & RUNNING EXPERT
My name is Jérémie Seck, also known as Jay Doesitall. I'm a certified personal trainer, passionate about running, performance and wellbeing. I help runners - from a first 5K to seasoned marathoners - reach their goals and push beyond their limits.
My coaching is built on three pillars: sustainable progress, injury prevention and joy in the effort. I bring this vision into each program, flexible and tailored to every level.
MY CREDO
“MOVE FORWARD WITH HIGH STANDARDS, EVOLVE WITH PLEASURE”
On my social channels (Instagram, TikTok and YouTube), I also share tips, experiences and inspiration to promote a healthy, demanding and accessible approach to sport.
WHY WORK WITH ME?
- Before being a coach, I'm first and foremost passionate about sport and people. I love to connect, exchange, challenge myself, win and above all, share.
- Still active in competition (running, Hyrox, Spartan, etc.), I stay grounded in the reality my athletes face.
- At 40+, my experience shows that you can progress at any age. I adapt to every profile, from beginner to advanced.
- My support goes beyond performance: I also take into account your personal, professional and family constraints, because they are part of real life.
- Together, we build a clear, motivating and tailored roadmap so you can move forward with confidence and results.
WHERE TO FIND ME?



MY PARTNERS
Demanding about quality and passionate about well-designed products, I’ve been collaborating for years with brands that share my values.

I’ve been an On ambassador for 4 years and a running coach for the brand for 2 years, convinced by their performance vision, clean design and human approach.

Powerbar was the first brand to trust me at the very beginning and has supported my sports nutrition for 5 years.



