Optimum Performance Sports - Sports Nutrition




OPS is proud to offer sports nutrition services to our athletes. Our Registered Dietitian will help athletes set tangible goals by creating an individualized food and nutrition plan that works for them. One of the many goals of the program is to help teach the athletes sustainable eating habits while also educating on how to fuel for both sport and longevity. The dietitian will determine the athlete's nutrition needs based on body type, sport, metabolic rate and performance goals and create a fueling plan designed for them. Each consultation is unique to the athlete and will include specific recommendations to help the individual reach their goals whether they are in-season or training in off-season.


  • Metabolic rate testing using KORR Medical Technologies *if recommended by dietitian
  • 60-90 minute initial consult discussing results from intake form
  • Personalized 4 day fueling and hydration plan with customized recipes based on the athlete's goals and preferences
  • Educational handouts
  • A bundle of supplement/product samples
  • Daily accountability and support
  • Follow up sessions

  • Fill out this form to be contacted.

    Meet the Dietitian

    Sarah Doerffler joined Optimum Performance Sports in 2020. She grew up in Fort Wayne and is a graduate of Concordia Lutheran High School, where she competed in swimming, track and cross-country. She holds a B.S. in nutrition and dietetics from Ball State University and earned her M.S. in exercise and nutrition science from Lipscomb University. During her time at Lipscomb, Doerffler was a wellness coach, group fitness instructor and interned with the Nashville Predators of the NHL. Doerffler used her residency period to focus on medical nutrition therapy and spent time working on an interdisciplinary team at the Vanderbilt Rehab Center in Nashville. Prior to joining OPS, Doerffler spent a year in Austin, Texas training at Onnit Academy headquarters and assisted the dietitian there counseling athletes. She is a national member of the Academy of Nutrition and Dietetics and also a member of the Collegiate and Professional Sports Dietetics Association.