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About Jen

Sports Dietitian

Jen Sommer-Dirks, MS, RDN, CSSD, is a certified specialist in sports dietetics. She is a firm believer in the importance of nutrition for athletic performance as well as overall health and well being.  Her background as both a sports dietitian and eating disorder specialist have led her to a deep understanding of the fine balance of managing ones diet and weight for sport without sacrificing mental or physical health. She is passionate about helping athletes improve their performance and health by maximizing their nutrition.  As an athlete and nutrition professional, she has a full understanding of an athlete’s unique nutrition needs. 

Jen first became interested in sports nutrition during her undergraduate studies at Colorado State University. During that time she participated in a bike tour of the French Alps and the 2004 Tour de France. Pushing herself up those super steep climbs, and then watching the pro cyclists do it twice as fast, got her thinking about how critical nutrition is to athletic performance. This inspired her to pursue a Masters in Exercise Science, which she received from the University of Colorado at Colorado Springs, and then to obtain her certification in sports nutrition. She also started competing in local cycling races, as well road and trail running races. Since then she has participated in several races and organized rides and runs, but mostly prefers to ride and run for enjoyment. Jen excels at uphill events and altitude and has run several trail 50ks and marathons. In the winter she continues her uphill exploits on skis!

donna flor, dietitian, sports dietitian, nutritionist

About Donna

Sports Nutrition Dietitian

Donna Flor MS, RDN is a registered dietitian and American College of Sports Medicine certified exercise physiologist. Donna grew up with an interest in nutrition and how the body works. She comes from a family where all of her siblings were active in multiple sports but took the time to sit down each evening to have dinner together. Coming from that background, Donna was thrilled to learn about a career in nutrition since she knew she wanted to work in a healthcare field where she could help others. She received her bachelor’s degree in Nutrition from Southern Illinois University Carbondale and completed her dietetic internship at the University of Iowa Hospitals and Clinics. After learning more about the sports nutrition field during her undergraduate work, and identifying it as her passion, she continued her education at Florida State University where she completed her Master of Science in Sports Nutrition.

After spending several years developing a strong clinical nutrition background in the hospital setting, Donna transitioned to providing education to elite athletes through the U.S. Anti-Doping Agency. Over the last six years, Donna has been providing medical nutrition therapy in the out-patient clinic setting. She is great at listening, adjusting plans to each individual athlete, and helping individuals build a healthy relationship with food and exercise. After watching (and participating in) her own body transformation with exercise through endurance sports, pregnancy, and now motherhood, she is continually impressed by the science of nutrition and exercise. Outside of work, Donna enjoys trail running, barre class, hiking and of course, spending time with her son and husband.

Amanda Turner


About Amanda


Amanda Turner MS, RDN, CSSD, is a certified specialist in sports dietetics. As a marathon runner that has qualified several times for the Boston Marathon, Amanda knows the amount of dedication required to be successful in athletic events. As a registered dietitian, she especially realizes the impact of nutrition on success. She created Active Fueling LLC to be able to help aspiring athletes, like yourself, to achieve the next level of their goals.

Amanda completed her Bachelor of Science degree in dietetics at Missouri State University. She then went on to the University of Kansas Medical Center to complete her dietetic internship and Master of Science in dietetics and nutrition. Beginning her career in clinical nutrition, she quickly learned that she preferred working with individuals outside of the hospital setting. Amanda has worked with well-known names such as The Biggest Loser® Resort at Fitness Ridge; Dixie State University™; Curves™ International; and the University of Colorado Anschutz Health and Wellness Center™. What sets Amanda apart, however, is her attention to each individual. Amanda strives to make goals attainable for each person that walks through the door, fully educate them on their body's physiology and nutrition needs, and she helps coach them through the barriers that get in the way. 


What to Expect


When working with us (your sports dietitian), we are likely to suggest lean meats, whole grains, vegetables, fruits, oils, nuts, seeds, legumes, and even ice cream! We realize that each individual comes from a different nutrition background with different nutritional preferences. Therefore, we work with each athlete to meet them at their current nutritional comfort to change their nutrition in a sustainable way. Research has shown a great correlation between carbohydrate timing, nutrient density and exercise performance. We will use this research to help build the optimal plan for your sport. While it is preferable to eat a whole foods diet and cook most meals from scratch, we are able to help you find that healthy balance between convenience and performance needs.

Empathy and Expectations

We want all of our athletes to meet all of their goals. Therefore, we speak directly to what needs to change in order to meet those goals. We listen effectively, and look at daily food choices as "data" that we can use for problem-solving and improving performance. Most importantly, we want and need total honesty and openness from our athletes to be an effective ally in their performance goals. By open discussion around successes and struggles, we will help you feel confident in all of your nutrition decisions.


Like the athletes we work with, we have high expectations and thrive on a challenge! Each athlete and dietitian will work together to define clear goals and work together to get there. We prescribe "homework" after each visit, and expect you to follow through by the next appointment time. Nutrition changes don't happen overnight, and each athlete must put in similar time and effort in the kitchen that they would put into the gym. By following our program, you can be the best athlete you've ever been.


Active Fueling's registered dietitians are members of the Colorado Dietetic Association, the Denver Dietetic Association, the Collegiate and Professional Sports Dietitian Association (CPSDA), Academy of Nutrition and Dietetics (AND), and Sports Cardiovascular and Wellness Nutrition (SCAN).