PERSONAL TRAINER & RUNNING EXPERT

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.
Mountain trail running
Race finish
Podium and medal
Track sprint
Mountain trail running
Race finish
Podium and medal
Track sprint
Mountain trail running
Race finish
Podium and medal
Track sprint

MY PARTNERS

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

Partner 1

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.

Partner 2

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