koi FITNESS Trainers
Koi Fitness’ professional instructors possess extensive experience instructing outdoor group exercise training. They each have unique competitive athletic backgrounds; many have coached amateur and professional athletes and have attained the highest level of education and certifications, including physical therapy experience and nutritional expertise.
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Stevan Krstic - Owner of Koi FitnessTrains:Morning classes at Golden Gate Park and Berkeley Marina. Brains:BS, Exercise Physiology and Kinesiology, SFSU
Brawn:Collegiate All-American in track and field, former competitive bodybuilder, football, and soccer player. Life outside Koi:Father to two amazing children; scheming up new workouts; and trying out new restaurants--this man loves his food! Why he's the best:The "Original Boot Camp Guy" in San Francisco, Stevan's love of fitness and helping others shines through his coaching. If you are ready to get in the best shape of your life, then he is ready to help you get there. Contact: stevan@koifitness.com |
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Alyssa HershkowitzTrains:Morning classes at Golden Gate Park. Brains:BS, Exercise and Sport Science, University of Utah
Brawn:Ironman Triathlete and Competitive Runner. Life outside Koi:Special Event Coordinator and Personal Trainer for the YMCA of SF and private personal trainer. Alyssa is also committed to seeing a movie in the theater at least once a week and enjoying an apple fritter on her birthday. She won a push-up contest at a friend's wedding--putting a few guys to shame. Why she is amazing:Alyssa has been teaching and training clients for over a decade. She may not be as loud a drill sergeant, but never underestimate her creative and seemingly-simple workouts that get results. Contact: alyssa@koifitness.com |
Galen PewthererTrains:Morning classes at Golden Gate Park. Brains:ACE Certified Personal Trainer Brawn:Ultra Marathoner, Extreme Adventure Athlete, and Competitive Cyclist. Life outside Koi:Founder of Bay Area Adventure Racing Babes & Dudes (BAARBD) Why he rocks:Galen believes there is an inner athlete in everyone. It doesn't matter if you just bought your first pair of running shoes or you've run a marathon: Galen will help you go farther. Contact: galen@koifitness.com |
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Marissa AxellTrains:Morning classes at Golden Gate Park. Brains: BA, Biology, Willamette University
Brawn:USAC Category 3 Cyclist, 2-Time Ironman Triathlete, and Competitive Pool and Open-Water Swimmer. Life outside Koi:Team Roaring Mouse Womens Road Team Manager, SF YMCA Triathlon Coach, Mentor to beginning women cyclists in the greater Bay Area, and San Francisco Bicycle Coalition volunteer - supporting cyclists rights! Why she is so cool:Marissa's spunky personality and innovative coaching will get you so energized in the mornings that you might forget about your daily caffeine fix. Contact: marissa@koifitness.com |
Sean DriesTrains:6am class at Golden Gate Park. Brains: BA in Communications from SUNY
Brawn:Triathlete and Marathon Runner. Life outside Koi:Father to two amazing boys, instructor at the Presidio YMCA, and private personal trainer. Why you'll love him:Sean's caring approach shines through his coaching. His sense of humor takes the edge off any tough workout. Contact: sean@koifitness.com |
Shannon BoughnTrains:Morning classes at Golden Gate Park. Brawn:Competitive Triathlete, Adventure Racer. Life outside Koi:Triathlon Trainer for the YMCA of SF, private personal training, and endurance training. Why she is awesome:If you are ready to really learn how to run, Shannon is ready to help you achieve your goal. After training with Shannon, you'll be surprised to find yourself going farther than you ever thought possible. Contact: shannon@koifitness.com |
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Vaj GranelliCoaches:The infamous Baker Beach Saturday workout. Brains: USA Boxing Coach Brawn:Competitive boxer for 25 years, kickboxer for 20 years, coach to top fighters in the SF area. You don't want to mess with this guy. Life outside Koi:Private security professional, and daddy of twins. Why he is cool:Vaj's unique motivational techniques run the gamut from telling jokes, shouting words of encouragement, and surprise take-downs for a chosen few. Nothing fazes this man. Contact: vaj@koifitness.com |




