Darian Silk completed his first triathlon in 1997 and has been involved in endurance sports ever since. He was a competitive age-group triathlete for a number of years, winning or placing in his age-group at many large races and regularly placing in the top three overall.  He remains active in endurance sport and recently won his age-group in the 1500m freestyle swim event at the 2019 Masters Swimming Ontario Provincial Championships.

He has received undergraduate and graduate degrees in exercise physiology and was a member of the USATriathlon Elite Coach Mentorship Program at the US Olympic Training Center in Colorado Springs. Darian is also certified as a Clinical Exercise Physiologist and a High-Performance Specialist by the Canadian Society for Exercise Physiology.

Darian coaches’ athletes of all ability levels who are willing to ask questions, learn and try their best.  He has coached a top-10 performer at the 2019 Pan Am games and athletes trying out their first sprint triathlon. From 2007-2013 he was the coach of the Columbia University Triathlon Club in Manhattan, NY where he helped the club win 6 consecutive Ivy-League Triathlon Championships.

Darian believes in a collaborative approach to coaching.  He believes that this approach, combined with hard work and good communication is the key to long-term athlete success.

In addition to coaching for Team Atomica Performance Darian also teaches exercise science courses at the University of Guelph-Humber and Humber College located in northwest Toronto and is a regular contributor to Triathlon Magazine Canada’s website.

Darian also coaches through the TrainingPeaks online platform.  Read more about him here: https://www.trainingpeaks.com/coach/darian-atomica

Darian takes on a maximum of 8 full-time athletes to ensure high-quality personal programming. Please get in touch as soon as possible to avoid disappointment. Click HERE to send an email to Darian Silk.


Kelly Fitzsimmons (Jan 8th 2020)

“My name is Kelly Fitzsimmons, and I’m the current #1 ranked women’s modern pentathlete on the Canadian National team. The highlight of my 2019 season was placing 9th at Pan Am Games in Lima, and I’m currently working towards the 2020 World Cup season and Tokyo Olympic qualification.

I began working with Darian in early 2018. At the time, I was looking for a coach who could help me look at my overall program and planning from a physiological perspective. Pentathlon (fencing, swimming, horse jumping, running with laser shooting) is such a complex sport, my biggest struggle was planning the load of 5 sport training week to week relative to my near and long term competition goals (while mixing in full time work!). This is where Darian came in.

Darian has been able to help me plan for the big picture while staying focused on what matters day to day to make it happen. Although he was new to pentathlon, he brought experience as a physiologist and multi-sport coach to the table that could help me approach my training holistically. His natural curiosity and willingness to learn more about my goals/challenges, my sport, and the approaches of my other pentathlon coaches has ensured that the plan is highly considered and tailored to me as an individual athlete. Darian excels at building a plan that matters and cutting out the excess that doesn’t. As a result, I’ve been able to reduce stress, stay healthy/uninjured, and confidently build the plan toward some very big goals over the next season.”Read More