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 recently earned his PRC through the Postural Restoration Institute ™ to further his capacity to help patients.

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 in charge of our internship program.

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.

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 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™.

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.

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 interest in the older adult population, but 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.
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.

Johnny Griffin -- The Director

Johnny is from West Virginia but grew up in small eastern CO town called Bethune. He recently graduated from CSU with a B.S. in Health and Exercise Science, concentrating in Sports Medicine. He plans to apply for graduate school in the near future, with hopes of becoming a Doctor of Physical Therapy. 


In his free time, Johnny enjoys watching and playing basketball and football, doing anything outdoors like biking, fishing, and camping, and tasting the best beers around Fort Collins. He also enjoys spending time with his friends and family, and his dog, Maple. 


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.


Nate Grimm, MS


Nate has been studying exercise physiology the last 7 years earning a Bachelor's degree from The University of Mount Union and a Master’s Degree from Colorado State University. This has allowed him to understand the effects of exercise on the human body in populations ranging from competitive athletes to sedentary populations. His  personal interests include many endurance activities such as running and cycling. He has been a competitive runner for over 12 years specializing in the 5k (15:40 PB) and more recently the half marathon (1:19 PB). This year he will make his first attempt at ultra marathon running. He also has begun to explore cycle tourism with a two month 2300+ mile tour of western Europe. He hopes to share his enthusiasm for endurance sport and healthy living with everyone he meets and coaches.


Jeff Buraglio, CSCS, ACSM EP-C


Jeff is a graduate of the University of Illinois and is an Exercise Physiologist and Certified Strength and Conditioning Specialist (CSCS). Jeff has been performing metabolic assessments for 15 years in clinical and research environments, and on elite athletes in MLB, NHL, US Olympic and Paralympic teams, and NCAA Div 1 football, basketball and volleyball. During the last 8 years, Jeff has focused on his love of endurance sports, working with amateur and professional cyclists, runners and triathletes. He is known for his effective, results-oriented training programs for athletic performance, fitness improvement and weight loss. Jeff combines his passion for the field with the diverse knowledge and experience necessary to help anyone achieve their goals.


In his free time, Jeff enjoys cycling, hiking, camping, kayaking and spending time with his wife, Kim, and their pug, Yoshi.


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1024 Centre Ave., Suite 100
Fort Collins, CO 80526

Phone: (970) 224-4141

Fax: (970) 797-1227

© 2020 by ProActive Physical Therapy and Performance Center, Fort Collins, Colorado  80526