Meet the Team

Chiropractor Colby Caltrider D.C.

Chiropractor St Johns FL Colby Caltrider

Dr. Caltrider earned his Associates degree in Arts from the University of North Florida with Dean’s List honors in 2010. He then got accepted at the prestigious “Fountainhead of Chiropractic,” Palmer College of Chiropractic in Davenport, Iowa. At Palmer College, he earned his Bachelors in Science and also his Doctorate in Chiropractic and graduated in February 2014. In addition, Dr. Caltrider was a member of the Palmer College Lacrosse team.

During his time at the Palmer College clinics, he learned from many great doctors on how to best treat the spine and nervous system to impact a patient’s total health. He earned “Student Intern of the Month” at The Palmer Clinic for his excellence in clinical skills.

Doctor Colby Caltrider SurfingAfter Graduating Dr. Caltrider has studied extensively and went to advanced seminars with the Motion Palpation Institute across the United States, and also has completed electives to additionally help those with lowback pain called Lumbar Flexion Distraction. He also earned an advanced certificate in a soft tissue technique called NIMMO Receptor Tonus trigger point therapy, and Level 1 in Rocktape functional movements. He is an active member in Florida Chiropractic association, and Northeast Florida Chiropractic Association. Dr Caltrider also is very active in the community and volunteer work. He served as President of Beaches Business Association, a board member with the Arlington council JAXchamber, and is an Active member of Southside Business mens club, Chamber of commerce, and Young professional groups like ImpactJAX.

Dr. Caltrider grew up in Jacksonville Beach, Florida. During high school, he was an All-Conference swimmer and Captain of the Varsity swim team, as well as Ocean Rescue

Chiropractor St Johns FL Colby Caltrider Engagement

Lifeguard for the city of Neptune Beach. Dr. Caltrider stays active with Crossfit, surfing, and fishing. He enjoys walking on the beach with his dog Ringo and wife Liz.

Dr. Caltrider’s mission is to provide you, your family and friends with outstanding chiropractic care for a lifetime of good health. Patients will benefit by making educated health decisions, having a functioning spine and nervous system, and better health through chiropractic care.


After a thorough exam using Neurological, Orthopedic, and Chiropractic test, Dr. Caltrider uses a variety of techniques to give you the best results possible.
  • Motion Palpation
  • Palmer Package
  • Diversified Full spine
  • Lumbar Flexion and Distraction
  • Soft Tissue Techniques / Manual therapy
  • NIMMO Receptor Tonus
  • Rocktape Rockblades (muscle scraping)
  • Rocktape FMT Kinesiology taping
  • Rocktape Movements assessment
  • Activator
  • Thompson drop

Donna Medders - Office Manager

Donna is a University of North Florida Graduate with her Bachelor of Science in Sport Management. For the past twelve years she has been working in the childcare industry with the last five years being in management. She is excited to make the transition into the medical field and cannot wait to create relationships with all current and new Back in Motion patients.

Donna and her husband Billy moved to the St. Augustine area a couple of years ago and enjoy spending most of their spare time being outdoors surrounded by family, friends, and their two dogs Hoosier and Ziggy. They host many family events at their property and Donna oversees the planning and executing of these events. She is very organized, detail oriented, and great with time management which shows in her work as well. You can be ensured that everything from scheduling your appointment, to your office visit, to filling insurance claims will be taken care of in an organized timely fashion. Donna's goal is to provide each patient with a stress-free environment and the best of care to all Back in Motion patients. Donna is excited to help serve the St. Johns/Nocatee area with Dr. Colby and help spread the mission statement of Back in Motion.

Renee’ Grotheer - Assistant Office Manager/Chiropractic Assistant/Rehab Tech

Renee’ is a graduate of Georgia Southern University with her Bachelor of
 Science in Kinesiology/Exercise Science. She has over 30 years of dedicated practice in the health and fitness community. For eighteen years Renee’ owned and operated her own personal training studio in Savannah, Georgia where strength training, Pilates, yoga and post rehabilitation were offered.

Originally a Jacksonville native, she returned to Florida to enjoy the sunshine with her husband. Renee’ is the mother of two daughters and one grandchild. When she is not working, she enjoys exercising, fishing, cooking healthy meals and refurbishing furniture. She is passionate about providing the best quality of care to each patient she encounters. Renee’ strongly believes in the importance of empowering others in their journey to achieve a healthy lifestyle.


10:00am - 1:00pm
3:00pm - 7:00pm

10:00am - 1:00pm
3:00pm - 7:00pm


10:00am - 1:00pm
3:00pm - 7:00pm

10:00am - 3:00pm

Appointment Only

Back in Motion, Injury and Wellness Center
309 Kingsley Lake Drive Suite 901
St. Augustine, FL 32092
(904) 999-8343