Fort Lowell


We believe we can do more together than we can alone. Our goal is to improve the lives of those we touch by applying current and effective treatment paradigms in a healthy, healing atmosphere, encouraging progress. We look forward to serving you!

Our Team

Lukas TvedtClinic Director - PT, DPT, OCS

Lukas received his Bachelor of Science in Kinesiology with a minor in Psychology from California Polytechnic State University, San Luis Obispo, CA, and his Doctor of Physical Therapy degree from the University of Southern California in Los Angeles, CA.

As a licensed physical therapist Lukas graduated from an APTA accredited Orthopaedic Clinical Residency, and has earned his board certification in the specialty of orthopaedics (OCS) through the American Board of Physical Therapy Specialties.

Lukas is an active member of the American Physical Therapy Association, and an Orthopaedic Section member. While attending Cal Poly, Lukas published research on the topic of Diabetic Peripheral Neuropathy, and continued to participate in research during his doctoral education in the Motor Behavior and Motor Control Laboratory at USC. He teaches locally and nationally on the topics of manual therapy for the spine and sacroiliac joint, as well as the hip, ankle and lower extremities. Lukas also developed an anatomy and physiology curriculum utilized internationally by a renowned Pilates organization for certification of its instructors. Lukas currently serves as a clinical mentor in the orthopaedic residency for licensed physical therapists seeking advanced clinical practice, and for student physical therapists from across the U.S. He has practiced in Oro Valley for over 5 years and has experience treating high school, collegiate, and professional athletes. These athletes include players from Major League Baseball, Mixed Martial Arts, ballet dancers, golfers, football, tennis and volleyball players.

Outside the clinic, Lukas is a member of the Fiesta Bowl Committee and, through them, helps raise money for local charities through Fiesta Bowl sponsored events. Lukas, his wife Mandy, and their two sons, Miles and Nolan, enjoy traveling and spending time with family and friends. He and his wife relocated to Tucson in 2007 and continue to enjoy all that Southern Arizona has to offer; originally from the Midwest, they enjoy the weather in particular. Lukas is looking forward to serving the city of Tucson as the Director of Athlon Physical Therapy.

Doctor of Physical Therapy
University of Southern California

Bachelor of Science, Kinesiology with a minor in Psychology
California Polytechnic State University 

Shari SheppardFront Office Manager

Shari was born and raised in Colorado and moved to Tucson, AZ in 1984. She has been employed at Ft. Lowell Physical Therapy since May 2007. Shari enjoys and excels in her front office position. Her cheerful personality makes the patients feel welcome.

Her greatest fulfillment is to see the smiling faces of the patients when they graduate. Outside of the office she enjoys reading, baking and gardening and is an avid Dallas Cowboy fan.

Jonny Sue Perkins-SnyderPT, OCS

Jonny Sue Perkins-Snyder, PT graduated from the University of North Carolina at Chapel Hill with a BS in PT in 1982. She joined Fort Lowell Physical Therapy in 2002. Her professional interests include treatment of neck, back and extremity injuries utilizing a manual therapy approach and fall prevention in the aged population.

She enjoys treating a variety of patients, helping them achieve their personal goals for rehab, whether it’s return to work, return to sports or simply getting back to their optimal level of function. In June, 2013 she earned recognition as a Board Certified Orthopedic Clinical Specialist through the American Board of PT Specialists, an achievement that only ~7% of therapists nationwide have earned.

Jonny Sue has a wealth of expertise and knowledge developed over 30 years of practice. She has previously worked in industrial injury prevention and management, including ergonomic worksite evaluations, functional capacity evaluations, and injury prevention training for workers.

In her free time, Jonny Sue stays busy with volunteer activities at her daughter’s school and her church. She enjoys hiking and snow skiing, and she cheers on the UNC Tarheels whenever she can.

Kate ShaheenPT, DPT

Kate grew up playing games and sports from volleyball, basketball, softball and track and field with an Arizona State Championship in the discus. She always wanted to make a difference in the world and from an early age has been involved in community service and volunteering with groups such a national honors society, habitat for humanity, JDRFI, cardinal key and many more.

Kate received her Bachelors of Science from Northern Arizona University in Exercise Science with minors in Chemistry and Biology then continued into graduate school at Northern Arizona University achieving her Doctorate of Physical Therapy. Kate stayed involved within the American Physical Therapy Association even through graduate school being a part of the Arizona State Board leadership meetings, national conferences and all as a PT/PTA student president representative.

As a physical therapist Kate has worked with a wide variety of cases from post-surgical, acute injury, motor vehicle accident victims, neck and back pain. She has had special training and continuing education working with pediatric patients, utilizing kinesiotape, pilates/ pilates reformer training and manual interventions as a training myofascial release therapist.

When not at work Kate is training for half marathons around the country, boxing, doing pilates, playing board or card games, traveling when she can and enjoying time with family and friends.

Daniel MusselwhitePT, DPT, ATC

Daniel grew up in Murfreesboro, Tennessee.  In 2014, Daniel completed the athletic training program at the University of Evansville and became a certified athletic trainer. He continued his education at Washington University in Saint Louis- School of Medicine where he received his Doctor of Physical Therapy in May of 2017.  Outside of the clinic, Daniel enjoys swimming, biking, hiking, and spending time with family and friends. 

Washington University in St. Louis – School of Medicine, Saint Louis, Missouri
Doctor of Physical Therapy, May 2017

University of Evansville, Evansville, Indiana
Bachelor of Science, Athletic Training, May 2014

Anna BarrettPT, DPT

Anna was born and raised in Chico, California where she enjoyed playing volleyball and competing in artistic roller-skating.  She earned her Bachelor of Science from the University of California Davis and worked as an Emergency Medical Technician.  Anna went on to earn her Doctorate of Physical Therapy from University of the Pacific in 2016 and began practicing in the outpatient orthopedic setting.  She moved to Tucson to be with her husband who is a pilot in the Air Force.  Outside of the clinic, Anna enjoys hiking, yoga, and going on adventures with her dog River. 

University of The Pacific, Stockton, California
Doctor of Physical Therapy, September 2016

University of California Davis, Davis, California
Bachelor of Science, Exercise Biology June 2012

Alissa RothpletzPTA

Alissa was born and raised in Scottsdale, AZ, then moved to Tucson in 2004 to attend the University of Arizona (both her parents are Wildcats). She was drawn to a
career in Physical Therapy due in part to my involvement with the Disability Resource Center and Adaptive Athletics Department for students and community
members at the U of A. Alissa has also enjoyed volunteer experiences with wheelchair rugby, wheelchair basketball, and working with whole life therapy summer camps
in Rhode Island and New York for individuals with spinal cord injuries. Following graduation, she began working at (then) Fort Lowell Physical Therapy as a technician, and maintained an ongoing connection to the company. Subsequently, she returned to school and obtained her certification and license as a Physical Therapist Assistant in 2016.

She is looking forward to using her broad experience and education to work with patients to help them achieve their therapy goals, and hopes to make them smile while doing it! In her leisure time, she enjoys playing recreational soccer with her husband Mark, bicycling, traveling and exploring new places with good food, and spending time with her two dogs.

Irene UrendaLead PT Technician

Irene is a certified physical therapy technician graduate of Pima Medical Institute and has been employed at Ft. Lowell Physical Therapy since 1992. She is highly experienced in all aspects of clinic work and enjoys working closely with patients.

Irene has been married to her husband Bobby for 32 years and they have 3 grown children and 4 grandchildren. During her time away from work she enjoys reading, puzzles, watching her grandkid’s sporting events, and baseball. She is an avid LA Dodger fan.

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