Fredrik Zillén has over the years helped thousands of runners to a more efficient running technique - from the slowest beginners to members of the Swedish national team in running and triathlon who have participated in the World Championships and the Olympics.

BACKGROUND AND SELECTED ASSIGNMENTS

• Running technique specialist
• Coached/coaches a number of different runners who have run the Olympics, World Championship finals, World and Swedish Championship medallists, Swedish record holders and national team members in running and triathlon.
• Conducted over 10,000 tests since 2014 using 3D cameras and MotionMetrix software on runners' energy efficiency and injury risk, providing precise answers on how each adjustment in the way runners move affects efficiency and injury risk at different paces.
• Head of running technique and biomechanics for runners in the worldwide education program to become a certified Hyrox coach Level 1 and Level 2.
• 6th place on the list of "2023 Leaders of the Year with the most social media reach and engagement in the running/athletics category".
• Fredriks YouTube channel has over 65.000 subscribers with individual videos that have more than 2 million views.  
• Writes articles on running technique for Runner's World magazine and participates as a coach and lecturer in their training camps and events.
• Participated on several occasions as an expert on running and running technique in Swedish public service radio and major newspapers.  
• Conducted courses and workshops on effective running techniques for many thousands of recreational runners.
• Provided workshops and education for physiotherapists, naprapaths, sports physicians, etc. in injury prevention and running efficiency through changing running techniques.
• Responsible for training camps focusing on running techniques for blind runners
• First coaching assignment as a 13-year-old in the athletics club Huddinge AIS.
• Long-time club coach in athletics and triathlon.
• Very experienced lecturer.  
• Columnist and running shoe tester for Outside Training magazine.
• Coach at numerous training camps abroad for both runners and triathletes.
• Speaker at major competitions such as Triathlon World Cup competitions.

FROM RUNNER'S WORLD MAGAZINE (US EDITION) FALL 2025: 
Read the full article here: https://www.runnersworld.com/training/a65815726/influencers-tiktok-running-advice/
”A sizable amount of advice on social media - offered by self-styled running experts, coaches, physical therapists and ”fitfluncers” - I garbage. It’s simplistic, or confusing, or downright wrong. Occasionally, it’s harmful. /…/ Zillén seemed different. /…/ Back at home, everything fell into place. And in the months since, I’ve run with less effort and more joy than anytime in my life - which is doubly satisfying knowing I had found this gem among so much junk.  
Runner’s Worlds reporter on how he went from years of running injuries to running more easily and pain free after purchasing ‘The Art of Efficient Running Technique’.