Cycling Biomechanics

Two decades of experience in cycling biomechanics and medical bike fitting.

Scroll down to learn more about our services and to book with your provider online.

All of our bike fits are based on a thorough pre-fit examination by the Cycling Biomechanist or a Medical Professional (Doctor or Physical Therapist). Your bike will be fitted based on movement patterns and range of motion to suit your style of riding and optimize comfort and performance.

Replacement parts are often suggested to optimize your bike fit. We do stock some stems and saddles by Specialized which are sold at retail prices. We always provide a full list of required parts and are happy to help you obtain them from your local bike shop.

Medical Bike Fitting: If you experience pain that reaches a medically significant level while you ride, or if the pain lingers to the point of affecting your life off the bike, you should consider a Medical Bike Fit. All medical bike fits start with a physical evaluation and rider interview by our Physical Therapist Bicycle Fitter or Physician, which bring out the key points that lead to a personalized cycling position geared to resolving your cycling related medical concern.

Some of the common issues we address through Medical Bike Fitting include degenerative disc disease, spinal fusions, arthritis, nerve pain or numbness in hands, feet, or groin.

Performance Bike Fits: If you have discomfort that slows you down a bit, but does not require a medical diagnosis, our Cycling Biomechanist will perform a movement evaluation to help dial in your fit for optimal riding. Performance fits are the ideal choice for riders looking to improve performance or general comfort while riding.

We fit road, mountain, triathlon, time trial, tandem, track, and recumbent bikes.

Online appointment scheduling is available for Performance Bike and Medical Bike fits. You can easily book online by clicking below, or read more about or providers in the next section and choose an appointment with Dr. Glowney, Charles, or Aaron.

If you have additional questions, please contact us at 303-315-9900 or email us at

Medical Bike Fits Include:
– Pre and post bike measurements
– Video capture to assist in discussion of spinal position
– Detailed biomechanics by Retul Motion Capture
– Postural and technique recommendations
– Exercises assigned and/or PT referral as needed

Medical w/ Physician –
– Physician:  Medical office visit charges billed with codes 99205 or 99215 for new or return patients in addition to $300 cash pay Biomechanist portion. (Check with insurance provider for coverage)
– Biomechanist: $300 cash pay at time of service

With Physical Therapist – $300
– One cash price for fit
– Saddle pressure mapping included


Performance Retul Bike Fits – $300
– Cycling-specific flexibility/functional strength assessment
– Dynamic data capture of 3D full body movements to determine optimal position
– Comprehensive digital reports of 2D and 3D body parameters, 3D bicycle fit coordinates, and bike frame geometry
– Saddle Pressure Mapping
– Postural and technique recommendations
– Exercises assigned and/or PT referral as needed

Charles VanAtta, BS

Charles has been bike fitting since 2002, progressed through all levels of Serotta International Cycling Institute education, then progressed to Specialized Body Geometry Fitting where he received his Body Geometry Masters Fit Certification.

Charles is available for Performance 3D Motion Capture Fitting, Performance Retul Motion Capture Fitting, and Performance 2D Fitting.


Aaron Castonguay, DPT, CSCS, CAFS

Aaron hails from the east coast with sport and orthopedic clinical experience from New York City on Wall Street and with the Williams College affiliated Williamstown Physical Therapy. While at Ithaca College in upstate NY he competed in both football and track & field varsity sports.

Aaron specializes in Medical Bike Fitting where he utilizes movement analysis with functional training and manual therapy to get you back to the activities you love! He is available for Medical Retul Bike Fits.


Jason Glowney, MD

Dr. Glowney’s background in the world of sports includes serving as a team physician for the University of Colorado Football, Cross Country, Track & Field, and Women’s Soccer teams during his Fellowship. He also served as the team physician for the Rio Grande Professional Cycling Team and Fairview High School. He enjoys performing Medical Bike Fits, is Specialized Body Geometry Fit certified, and works with our Cycling Biomechanist to address your medical bike fit issues.

Dr. Glowney is available for 3D Medical Bike Fits.

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