Vicki Ostendorf

Founder | Triathlon Coach | Run Coach | Personal Trainer

Credentials: NASM CPT, CKTT, IM Certified Coach, RRCA Coach, Certified MFR Therapy

As a coach, I see things in each individual that they don’t necessarily see about themselves….it is my goal to allow everyone to realize their potential then, provide the coaching and support to get there!

Professional History

I graduated from UW - LaCrosse with a degree in Corporate Fitness and Minors in both Business and Coaching. I spent 4 years playing outfield for the women’s fast-pitch softball team in LaCrosse. Shortly after graduating, I realized I really loved torturing individuals on an ongoing basis, so personal training seemed to be the perfect fit. I've been doing it ever since! Learn more about Vicki's professional history and why she started Tri Fitness here.

Fun Facts About Vicki

  1.  If you are going to dare me, be ready.  

  2.  I like to win!

  3.  Everyone should live by: “Work hard, play harder.”

  4.  I will cheer for the Packers even if they are losing.


Scroll to meet our other amazing staff!




Roger Mathieu

Trainer | Triathlon Coach

Credentials: NFPT CPT,  NFPT Fitness Nutrition Specialist, USAH CEP Level 4

Professional History

I obtained my CPT (certified professional Trainer) in February of 2019. I am constantly working on continuing education to learn more, and be better equipped to help clients in a multitude of ways. I coached hockey for 15 years in the Stillwater Area Hockey Association (SAHA), ages 5 through 18 years. I also coached Lacrosse at the Stillwater Area Lacrosse Association for 9 years, youth, Junior Varsity and Varsity. I have been actively engaged for over twenty years in maintaining my own fitness and helping others achieve their own goals. I started racing triathlons in 2005, and have been involved in the sport ever since. In 2018, I completed Ironman Wisconsin in 12:26, my first ironman. In 2019, I completed Ironman Mont-Tremblant in 12:17. I am currently training for Ironman Tulsa and Ironman Mont-Tremblant in 2020. I really enjoy fitness and helping people reach their goals.

Fun Facts About Roger

  1. I retired as an Air Traffic Controller in December 2017 after 34 years on the job.

  2. My wife Teresa also retired from Air Traffic Control in May 2015 after 30 years on the job.

  3. We love to travel, and average about three months a year on the road somewhere. Our next big trip is Africa in 2021 for a month or so, we plan on climbing Mount Kilimanjaro.

  4. I love all types of activities that are outdoors, skydiving, scuba diving, Skiing, Hockey, motorcycling, climbing, photography and the list goes on and on.


Jack Zahn

Personal Trainer

Credentials: NASM CPT, B.S. in Kinesiology, University of Minnesota - Twin Cities

I am a believer in evidence-based and research proven forms of exercise, I don’t get caught up in fads. Fitness goals take hard work and patience to achieve, but I am there to help you complete them! You work hard, and I will work hard to make sure your goals are accomplished. 

Professional History

Professional History: I graduated recently from the University of Minnesota (Go Gophers!) with a degree in Kinesiology. At the University of Minnesota, I interned with the football team in athletic medicine. Through my studies, I found that I enjoy the fine details of movement and exercise, so personal training was a perfect fit. I have experience in small and large group classes, one-on-one personal training, and corporate wellness. I enjoy running and strength training as my favorite forms of exercise (fall is my favorite time of year to run outside). 


Fun Facts About Jack

  1. My middle name is Daniel, so yes.. I am Jack Daniel.

  2. I enjoy watching the Packers play and win. 

  3. I lived in upstate New York for two years.


Adam Gergen

Performance Cycling Class Trainer

I strive to help our clients and Tri team position themselves to accomplish any mental or physical challenge/goal. My primary job with TF is to lead our performance cycling classes and ensure our clients progress with bike technique, posture, and overall stroke. Nothing more pleasing than to see a person consistently working hard on the bike increase their power and endurance through TF performance cycling classes.

Professional History

Graduated college with business Marketing degree from St. Cloud State University in 2006. Since graduating I have been an account manager in sales/project management (10+ years). During my time away from work you can find me outdoors under the sun enjoying a run, bike, swim, ski session, and even some climbing. Currently training for Ironman #2 (WI 2019).

Fun Facts About Adam

  1. Completed both 70.3 and 140.6 triathlon distance races (IM WI 2017)

  2. Enjoy photography as a hobby (still learning)

  3. Huge WI Fan – Go Packers, Go Badgers, Go Brewers

  4. Have a twin brother (fraternal) – nothing alike

  5. Absolutely love MN and Twin Cities area; however, could move to CO and play in the mountains tomorrow and be totally content (300 + days of sun)

  6. The race I’m most looking forward to in 2020 is the American Birkebeiner cross country ski race (my 2020 race goal)


Pete Ellis

Trainer | Cycling Coach

Credentials: Certified Cycling Power Coach

I am well versed in improving position on the bike, power output, interval training, bike handling, bike tech, and maintenance. My ultimate hope is to help my students achieve their training and racing goals while remaining healthy and excited about triathlon.

Professional History

Coming soon!