“The body is meant to move.  Let's get 'em movin'.”    -  Andy

The ProActive Staff


We are a dedicated team passionate about how people function. Our focus is to improve your function and to help your health and fitness prosper.

Brian Benjamin, PT, DPT, PRC, Owner


Brian Benjamin graduated from Ohio University and then went on to receive his Doctorate in Physical Therapy from Slippery Rock University in Pennsylvania. He lived in Estes Park, CO for 14 years before moving down to Fort Collins. He has a wonderful wife, Tracy and two beautiful little girls. He started ProActive PT with his friend Andy Collingwood in 2008, after they had worked together in Estes Park for 7 years. He enjoys backpacking, biking, fishing, football, basketball, and spending as much time with his family as he can.

Brian is also Postural Restoration Certified™, a certification achieved by relatively few clinicians, in Colorado and worldwide, which has enabled him to further his capacity to help patients.

Ask Brian a question HERE!

Andy Collingwood, ACSM EP-C, Owner

Andy Collingwood received his bachelor’s degree from Texas A&M University and is an American College of Sports Medicine Certified Exercise Physiologist (ACSM EP-C). 

He lived 14 years in Estes Park,CO before moving down to Fort Collins after opening up ProActive PT with Brian. He is married with 3 children and enjoys college football and basketball, playing basketball and soccer, hiking and beer tasting.

Andy works individually with clients in the supervised exercise program. He is also manages our internship program for students interested in pursuing PT.

Ask Andy a question HERE!

Ruth Waller-Liddle, PT, DPT

Ruth Waller-Liddle is originally from Manchester, England. She received her
undergraduate degree from McNeese State in Louisiana and her masters from Baylor
in Texas. She then received her doctorate in physical therapy from Texas Woman’s University in Dallas, Texas. She is Trigger Point Dry Needling Level 1 and Level 2 certified through Kinetacore.

She is married and enjoys running, lacrosse, skiing and doing anything outdoors.


Ruth is the first sponsored athlete for ProActive PT. She competes (and wins) regularly in running events throughout the region. She is presently working on her Pilates mat work certification.

Ask Ruth a question HERE!

Craig Depperschmidt, PT, DPT, PRC


Craig is a native of Colorado, originally from Loveland, CO. After getting his undergraduate degree in integrative physiology from University of Colorado at Boulder, he pursued his Doctorate in Physical Therapy at Northern Arizona University in Flagstaff, AZ. He has practiced in Fort Collins as a physical therapist since 2009. Craig has extensive experience with personal injuries from his background as an athlete, which is part of the reason why he became a physical therapist. He specializes in addressing movement and postural dysfunction that leads to abnormal bio-mechanics and pain. He enjoys working with runners, triathletes, and anyone who has a desire to feel better. 

In his free time, Craig enjoys competing in running races and triathlons of all distances, climbing 14ers, and spending time with his wife and two dogs. 

Craig is one of the relatively few clinicians, in Colorado and world-wide, who is Postural Restoration Certified™.

Ask Craig a question HERE!

Rachel Kroncke, PT, DPT, CPT


Rachel is originally from Chicago, but grew up in Thornton, CO. She has a background in a variety of athletic activities, and has always had a passion for sports medicine and functional rehabilitation. Rachel graduated with a B.S. in Human Performance & Physical Education, while playing basketball for Adams State University. She then received her Doctorate of Physical Therapy from Northern Arizona University.

Rachel has experience in treating a wide variety of orthopedic conditions, but has a special interest in disorders of the foot and ankle and lumbopelvic region. She believes strongly in regional interdependence, the concept that impairments are often connected through a series of biomechanical dysfunction throughout the body. Rachel believes best practice involves combining the best available evidence with individualized patient goals and her own therapy expertise to achieve success. Her additional specializations include training in Pilates and core stabilization, postural restoration, vestibular rehabilitation, and general strength & conditioning.

In her free time Rachel enjoys running, hiking, snowboarding, travel, photography, spending time with family and friends, and exploring all that Colorado can offer with her husband and dogs.

Ask Rachel a question HERE!

Sara Truelsen, PT, DPT
Sara grew up in a small farming community in Southwest Colorado, but has spent several years living in Fort Collins. In 2013, Sara graduated with her B.S. in Health and Exercise Science from Colorado State University. Following a year and a half as an intern and staff member at ProActive PT Center, she went on to receive her Doctorate in Physical Therapy at Touro University Nevada. She has since returned to her home state of Colorado and rejoined the ProActive team. Sara has a special interests in functional medicine and in older adult populations. She strives to provide exceptional care to individuals of all ages.
During her free time, Sara enjoys camping, fishing, hiking, and taking advantage of all that Colorado has to offer alongside her husband, Erik, and their two dogs.
Ask Sara a question HERE!
Tracy Benjamin, PT, DPT

Tracy Benjamin graduated from the University of Northern Colorado and then went on to receive her Doctorate in Physical Therapy from Slippery Rock University in Pennsylvania. She lived in Estes Park, CO for 14 years before moving down to Fort Collins. She loves working with and helping people of all ages get back to functional health. She enjoys hiking, biking, reading, and spending as much time with her family as she can.

Ask Tracy a question HERE!

Johnny Griffin -- The Director

Johnny is from West Virginia, but grew up near the small town of Bethune in eastern Colorado. He recently graduated from CSU with a Bachelor's of Science in Health and Exercise Science, concentrating in Sports Medicine. Shortly after, he received an internship opportunity with ProActive that helped confirm his passion for helping people in this career field. He is actively pursuing admission into a graduate program to receive his Doctorate in Physical Therapy. 


In his free time, Johnny enjoys playing any sport, biking, fishing, hiking and camping, and tasting the best beers around Fort Collins. He also enjoys spending time with his friends and family, and his dog, Maple. 

Ask Johnny a question HERE!


Amanda Lederhos -- The Boss

Amanda grew up in Aurora, Colorado and moved to Fort Collins to go to CSU. She recently graduated in December of 2018, completing a Bachelor’s degree in Biomedical Science. She plans to apply to graduate school to earn her doctorate in Physical Therapy. In the meantime, Amanda works as the Assistant Director for Brain Balance; a center for children with neurological disorders, and also at a Parkinson’s research lab at CSU.


In her free time, she loves hiking, skiing, and anything outdoors. Amanda is motivated by helping people of all ages reach their full physical and emotional potential so that they can lead happy and healthy lives.

Ask Amanda a question HERE!