C.O.R.E. located in Omaha, NE. We are a family owned and operated Physical Therapy and Sports Performance clinic comprised of a husband and wife duo. Together, we have more than a combined 19 years of experience in Physical Therapy and 25 years in Strength and Conditioning/Sports Performance.

We work together to treat all patients as individuals and work tirelessly to formulate treatment plans and programming so you can reach your goals or eliminate you pain. Individually, we are leaders and innovators in our field. Together, we are stronger.  We invite you to live that model as well.  Together, we will make you stronger inside and out.  This is WHO we are, and this is WHAT we do!

We strive to be the very BEST in Omaha, we will prove it to you with cutting edge one-one one treatments and rehabilitations plans.


Omaha physical therapy CORE.

Omaha physical therapy CORE.

C.O.R.E. is an acronym that personifies how we wanted to deliver healthcare services directly to you, in all facets of fitness in recovery. Based right here in Omaha, NE, we are now a multi time award winning facility.


We emphasize cardio and sports conditioning prescription/program and strength training periodization. With active individuals, staying active or returning to activity is imperative to your recovery, and we keep that in the forefront of your treatment plan.


We specialize in orthopedic and musculoskeletal injuries and pathologies, as well as a multitude of sports injuries other Physical Therapists don't have the experience or speciality know-how to treat. We are truly a ONE of a kind facility and staff.

ONE-one-ONE treatment, every day, every time, ONE therapist.


We specialize in rehabilitation of post operative injuries and return to sports or activities to a higher level than pre injury status. Rehab to us doesn't mean you can walk without a limp, it means you return to doing all the things you love and enjoy without limitations or restrictions. We strive to make you perform better than before.


We prescribe exercise to incorporate to treating the entire body for full progression to striving to achieve your maximum health and pain free life. Its a service we provide that is unique to our industry here in the sports field in Omaha, NE.

Key Mission Statement Points

At C.O.R.E. Physical Therapy & Sports Performance in Omaha, we strive to provide state of the art and cutting edge technology and techniques to facilitate your recovery, reach your goals, and enhance your health. We emphasize one on one care throughout your rehabilitation process to ensure the best outcomes in an efficient manner to get you back to your full potential.  All of the Physical Therapists/Sports Performance coaches at C.O.R.E. are athletes themselves, ensuring your activity goals and recovery are in good hands by providers that understand the mind of an athlete. This is WHO we are, this is WHAT we do. You will NOT find a better staff or facility in Omaha.

C.O.R.E. was also a finalist in the 2016 Omaha’s Choice award for Health Care/Physical Therapy.

west Omaha Physical therapy

In 2017, CORE won the prestigious Omaha’s Choice award First Place for Physical Therapy in Omaha.

Best of Omaha, Physical therapy Omaha

C.O.R.E. Expertise

Team Members

Liz Wallace

Liz is our newest edition here at CORE, she brings excellent interpersonal skills in her position of Office Manager. She has been vital to our growth here at CORE

Liz is a busy mom of two, who doesn’t ever have a dull moment. When she’s not at CORE, she plans community classes and events for Athleta, she owns a photography business, and serves on the FITGIRL Inc. Board of Directors. In what little spare time she has, she enjoys all things fitness-related, although off-road trail running is her favorite by far.

Liz first met Claire years ago, when she was researching physical therapists to treat a nagging running injury. Naturally, the two hit it off, and through a series of life-changing events, Liz is now CORE’s first patient turned employee!



Best of Omaha, Physical therapy

Dr. Claire Lakatos-Rathjen PT, DPT, SCS, CSCS

Claire Lakatos-Rathjen is a Doctor of Physical Therapy (DPT) with 8 years of experience in orthopedic and sports rehab.  Claire holds one of only 2 female board certification for sports specialist (SCS) in the state of Nebraska. She is also a Certified Strength and Conditioning Specialist (NSCA) and strength coach, with 12 years of experience in the Strength and Conditioning realm. She grew up in Council Bluffs, Iowa, playing 3 sports in high school (track, cross country and softball) before moving on to Creighton University. At Creighton University, Claire was on the rowing team for 3 years  In 2004, Claire was named the Female Strength and Conditioning Athlete of the Year by Creighton University and the NSCA, and still holds several weightlifting/conditioning records at Creighton. As a Division I All-American and captain of her college rowing team, she developed a love of weight training and sports performance.

Claire paved her way to graduate school at Creighton university, earning her Doctorate in Physical Therapy in 2008. Claire continues to compete and train athletes in weightlifting competitions. She  currently holds 5 state record in Nebraska for Powerlifting.  In her spare time she loves to travel, exercise, she is an avid runner and triathlete, and she has an unequivocal love of cats.  Claire is Mark’s wife and best friend! They work side by side at CORE Physical Therapy and Sports Performance PC.

Dr. Claire is a Adjunct Faculty Professor at the Creighton Medical Center starting Feb of 2017, she is a professor of special topics in athletic populations. Dry needling, research, KT taping, Sports performance are her areas of lecture.

Dr. Claire is also Dry Needling Certified by the Myopain Institute.

Claire is also fully certified to perform medical Bike fits and has been practicing them for more than 10 years.

Full slow motion Gait analysis for running is her bread and butter, no ONE person is more thorough.


  • Doctor of Physical Therapy, DPT
  • Sports Certified Specialist, SCS
  • Certified Strength and Conditioning Specialist, CSCS
  • Bachelors of Science, Exercise/Sports Science, BS
  • Dry Needling Certified by the Myopain Institute.
  • Medical Bike Fit to create more power and less strain.
  • Full Gait analysis for Running mechanics and efficiency.
  • Competitive runner, triathlete, and record holding powerlifter
  • Former Div. 1 Rowing athletes at Creighton.
Omaha physical therapy CORE.

Dr. Mark Rathjen, PT, DPT, CSCS

Mark Rathjen is a Doctor of Physical Therapy (DPT) and holds the certification of Strength and Conditioning Specialist. Mark grew up in Lincoln Nebraska, and went on to attend the University of Nebraska  at Lincoln, In college, he was part of a club powerlifting team and competed in many local and regional events in various weight classes. In his love of performance, strength training, dietetics, kinesiology and the body, he moved on to graduate school at Des Moines University Medical Center, graduating with a Doctorate in Physical Therapy in 2006.

For more than 20 years, Mark has been involved heavily in weightlifting, sports performance, powerlifting and exercise/training, always emphasizing injury prevention and safety. Mark also has an extensive background in martial arts.  Mark continues to live an active lifestyle with power lifting, olympic lifting, and the occasional cardio event and trail run.  In his spare time, mark enjoys traveling, trying new foods, ice cream, all forms of exercise and of course shares an un paralleled love of animals, especially his cats.  Mark is Claire’s husband, and her best friend! They work side by side at CORE Physical Therapy and Sports Performance PC.

Dr. Mark is also fully Certified in Dry Needling techniques from MyoPain Institute.

Mark is Qualified to examine full slow motion running gait analysis and correction to decrease pain and over use injuries. Slow motion analysis for weight lifting, technique, bar path, mechanics and leverage are performed when necessary.

Mark also offeres segmental weightlifting instruction for all Olympic lifting and powerlifting, mobility training for mechanics and proper muscle firing patterns, and will ensure you lift properly for YOUR frame, goals, and ability level.


  • Doctor of Physical Therapy, DPT.
  • Certified Strength and Conditioning Specialist, CSCS.
  • Bachelors of Science, Exercise/Sports Science, BS.
  • Dry Needling Certified, Myo-pain Institute.
  • Fully trained in slow motion gait analysis.
  • Fully trained in Olympic coaching, powerlifting techniques, and mobility drill techniques to ensure proper positioning and technique for YOUR body type.