Our Team

We have assembled a team who deliver the highest level of knowledge and expertise in their fitness modality. As athletes and coaches we firmly believe that a comprehensive approach, consistently integrating stability, mobility and regeneration in to training, to complement endurance-specific workouts, is the silver bullet to injury prevention and improved performance.

dai endurance mike


Michael Sayers

Michael Sayers most recently worked for USA Cycling, cultivating the next generation of American riders. He served as the U.S. Olympic Team Men’s Coach at the 2012 London Games and the 2016 Summer Games in Rio de Janeiro. He has led Team USA at the last 9 World Championships for both the U23 Men and the Elite Men. He was part of the BMC Racing Team as the only American Sports Director. Before that, he led teams that raced in America and Europe for 13 years. He rode for Comptel-Colorado Cyclist, Mercury Pro Cycling Team, and Health Net before concluding his career on the BMC Racing Team. Sayers was with the BMC team from its inception as a Continental team to Pro Continental to World Tour team.

Once he stopped riding professionally, Sayers served as the assistant director of global cycling operations for BMC. In his role with the BMC Racing Team, Sayers contributed to Cadel Evans’ winning the 2011 Tour de France, and the development of young American stars like Taylor Phinney and Neilson Powless. He served as the team director for the men’s road team at the 2012 Olympic Games in London, where Phinney placed fourth in both the road race and the time trial.


dai endurance julie


Julie Young

Through her extensive race career at the elite international level, Julie brings firsthand knowledge of science-based, individualized training programs combined with nutrition, mental conditioning and race tactics produce winning results. Julie is considered one of America’s most dominant European stage racers of her era.

  • 12-year US and World Tour Pro Cyclist for Kahlua, Saturn, Timex, Autotrader, & Team Fannini
  • US National A-Team Cyclist
  • 6-time UCI Road World Championship Team Cyclist

  • Tour de L’Aude (women’s equivalent to Le Tour de France) General Classification Victory
  • Multiple winner Xterra Lake Tahoe and Tahoe City
  • Winner, 50k Trail National Championships
  • Winner, US Amateur Mountain Bike Cross-Country and Marathon National Championships

Her expertise gained while working with the sport’s most prominent physiologists and coaches including Chris Carmichael, Mirek Mazur, Harvey Nitz and Dr. Massimo Testa gave her a solid background in a variety of training methodologies.
As one client shared “I’m achieving things that I’ve never done before. Julie helps me see my potential.”
Julie is uniquely poised to help you tap your full potential:

  • Co-founder of DAI! Endurance
  • Co-founder of the Bike Like A Girl, non-profit, getting more girls on bikes
  • Kaiser Permanente Sports Medicine Endurance Lab Consultant
  • 7-year Director at Silver Sage Sports and Fitness Lab
  • 11-year Founder/Head Coach at O2fitness Coaching and Training

Coaching Specialties:

  • Cycling (road, mountain and cyclo-cross)
  • Road and Trail Running
  • Road and Off-Road Triathlon
  • Injury Prevention
  • Return to Sport

Biomechanical Services

  • SIMI Motion Capture bike fitting
  • SIMI Motion Capture gait analysis


  • Exos (formerly Athletes’ Performance) Performance Training Mentorship
  • Specialized Body Geometry Bike Fit Certified Technician
  • Medicine of Cycling, Bike Fitting Certification.
  • Six month fellowship – Advanced Functional Biomechanics of the Lower Quarter: Integration of Technology into Practice, USC – Movement Performance Institute




Robert Ressl-Moyer

Born and raised in Austria. 2010 a year foreign studies in Spain. Graduated a 6 year program 2013 from the University of Vienna with a degree in exercise science. After teaching PE in High Schools in Vienna I met my wife and moved to Boston where I started working as a Personal Trainer at the Boston Athletic Club. August 2016 we moved to Sacramento and I got involved with Fleet Feet and I am now responsible for their Functional Fitness program and a coach for CIM training. 2017 I founded ReMo Fitness with the goal to provide personal training and personalized running coaching to Sacramento.
I believe in personalized coaching to discover the true potential of each one of my clients. I ran multiple marathons with a PR of 2:43 at CIM 2016.

Strength & Conditioning Instructor

Domenic D'Acquisto

Domenic was born and raised in Redding, California where he attend Enterprise High School. He found the love for all things running and fitness at a young age. Domenic dominated his high school running career by becoming a three time sections cross county champion after only missing his sophomore year by injury. His record times for the 1,600 is 4 minutes, 14.47 seconds while he owns the second-fastest 3,200 in section history at 8:59.58. Domenic was scouted by many prestigious colleges from Cal Poly to Columbia but his decision was to attend Arizona State University.

After a year at ASU Domenic transferred to California State University, Sacramento where he completed his Bachelors degree in Kinesiology with focus in Therapeutic Exercise and Rehabilitation. He then went on to graduate with his Masters in Kinesiology Exercise Physiology.

Domenic has worked at Rio del Oro Racquet Club as a Personal Trainer. He also worked as a Student Supervisor and Personal Trainer while studying at Sac State at the on campus Well. The Union Well is Sac States state of the art gym on campus.



Shayna Powless

Originally from Sacramento, Shayna started out as a competitive runner and triathlete from elementary through high school. In 2012, her senior year of high school, she decided to switch her focus from competing in multiple sports (track/cross country, triathlons, and cycling), to focusing solely on cross-country mountain biking. Through her four years of college, she competed in both road and mountain bike racing with the UCLA cycling team. She also raced with the BMC MTB Development team from 2012-2014 and the Liv Co-Factory MTB team from 2015-2016. This past year, Shayna switched her focus to road racing and gained valuable experience from racing in the pro peloton. She plans to continue making road racing her primary focus in the upcoming years and is very excited to be joining Twenty20 for another year, a team she knows will help her accomplish her goals.

Outside of cycling, Shayna enjoys spending time with her friends and family, which often includes road trips and various outdoor adventures. She also enjoys yoga, beach trips, and watching movies. Additionally, Shayna is passionate about mentoring and inspiring other women and young kids to stay healthy and active through biking.

Career Highlights

  • San Dimas Stage Race – Best Young Rider
  • 8th 2016 Mont Sainte Anne U23 World Cup
  • 9th 2015 Windham U23 World Cup
  • 8th 2015 USA Short Track XC Nationals
  • 19th 2014 UCI U23 XC World Championship
  • 1st 2013 USA U23 XC MTB Nationals


  • 8th Tour of Murrieta
  • 8th San Dimas Stage Race
  • BYR San Dimas Stage Race
  • 12th Fontana U.S. Cup XC
  • 5th Fontana U.S. Cup STXC
  • 43rd Amgen TOC


  • 2nd San Ardo Road Race
  • 8th Mont Sainte Anne U23 World Cup
  • 3rd USA U23 XC MTB Nationals
  • 9th USA Short Track XC MTB Nationals
  • 7th Missoula US Cup XC
  • 6th Missoula US Cup Short Track XC



Sian Turner Crespo

Sian is currently studying at the University of Western States for a MSc in Human Nutrition and Functional Medicine. She also trains for and races in a myriad multisport events including the Leadville Trail 100 mountain bike raceand the Xterra Triathlon World Championships. With a background in
science (MA Natural Sciences, Cambridge University) and engineering (MSc Computer Science, University of London) and
growing experience in the nutrition industry
(she currently works as an Operations and Support Specialist at the Functional Nutrition Alliance), she has a unique perspective
on nutrition and what it takes for athletes to perform at their best.

Sian is also a Level 2 ICPIMBA coach and Co-Founder of the Non-Profit organization, Bike Like a Girl.

Her athletic prowess is nothing to sneeze at, either, which is why she is the perfect trifecta for this job - smarts, systemic knowledge and a serious mind for honing her body for winning.


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