Physical Therapists

John Seivert


John is an expert in the management of spinal dysfunctions and orthopedic problems of the extremities. “My 36 years of experience treating patients with musculoskeletal problems has taught me that listening to the patient’s concerns is one of the key elements to providing a successful outcome,” explains John. “I listen actively, so that I understand the problem from the patient’s perspective. Then, using my advanced training and their input, I can accurately assess the extent of the injury and what needs to be done to correct it.”

Lori Sams


After earning a Master of Physical Therapy degree, Lori completed training in the Norwegian approach to manual therapy in 2003. Since then, she has continued her training in this approach, attending yearly classes. She has also continued coursework in evidence-based treatments for the shoulder, knee and vestibular rehabilitation, and is completing Pilates teacher certification with an emphasis on rehabilitation.


Nathan Tanney


Nate's most surprising discovery has been how fulfilling it can be to help someone else. He has had experiences where patients will come in with pain that they have had for years, and in one visit he is able to change that pain for the better. The feeling that comes with convincing someone that they don’t have to live in pain and that they can manage their problems without expensive medications or surgeries has been surprisingly rewarding.

Sophia Delegard


Sophia is originally from Minnesota, but has lived in California for 13 years and counting. She attended UCSF for her physical therapy education with a special interest in both orthopedic and pelvic floor rehab. Sophia loves anything outdoors: mountain biking, trail running with her dog, fly fishing, and climbing.


Lydia Tanney


Lydia is a Certified Athletic Trainer who has experience working with athletes across the spectrum from professional down to the middle school level. She has a special interest in biomechanics of the lower body and injury prevention and increased performance. Knee and other lower body injuries can be devastating for an athlete and their team, but analyzing sport specific movements and implementing focused strengthening can have a positive effect in preventing injuries that sideline athletes.

Kayci Most

Kayci is a Nevada County native who loves to dance, try new things, and spend time with friends and family. Working at Body Logic has brought her a new kind of joy being a part of the rehabilitation process and seeing firsthand the healing of individuals in their improvement of strength and confidence to move and do the things they love. She is a certified Polestar Pilates Instructor and is looking forward to new traveling adventures!

Andrew Brown

Andrew spent four years in the United States Marine Corps before going back to school and recently graduated from Sacramento State University with a BS in Kinesiology. He is currently working toward completing the prerequisites to apply to physical therapy school. In his free time Andrew enjoys cooking, reading, and spending time with his girlfriend and dog.

Physical Therapy Aides

Marie Hays

Marie's bio coming soon!

Office Staff


Danielle Mitchell

Office Manager

Danielle's bio coming soon!

Sarah Barrows


Sarah's bio coming soon!

Cassidy Donnelly


Cassidy received her doctorate of Physical therapy from Sacramento State University, where she was trained in neurological disorders, orthopedics and cardiopulmonary/acute care. She completed clinical rotations in orthopedics, acute care and acute rehabilitation. She is particularly interested in orthopedics, as well as balance and fall prevention, and plans to pursue further specialization to become an orthopedic clinical specialist. Cassidy enjoys empowering people with the tools they need to manage their pain and get back to the activities that they enjoy. By partnering with her patient in a caring, compassionate environment, she helps them to improve mobility, stability and function.


Kaya Ervin


Neuro Rehabilitation

Kaya is a California transplant from North Carolina, where she earned her Doctor of Physical Therapy from Western Carolina University.  In graduate school she was introduced to the practice of neurologic physical therapy and after the incredible experience of helping someone learn to walk again following a stroke, decided to focus her physical therapy career on treating neurological injuries and diseases.  Kaya is also passionate about fall prevention and balance and she’d love to see fewer broken hips in this world. She is doing her part with her certification to deliver the Otago Exercise Program for Fall Prevention. When she’s not in the clinic you can find Kaya swimming in the Yuba river, rock climbing, playing piano, or practicing her amateur metalsmithing skills.

Hannah Kiyohara


Born and raised in Seattle, Washington, Hannah enjoys fishing, snowboarding, reading and trying new beer and food. She grew up playing softball and basketball and ended up playing Division I softball at the University of Louisville while completed her undergraduate education. She has been practicing physical therapy since August of 2018 and loves connecting with the community through her patients. She's passionate about serving, learning and providing top of scope care in my profession.