Welcome to our online booking site!

If you are a new patient, please book a 15-minute discovery call or call us directly (802)-278-4142 to book an initial evaluation.

If you are a returning patient, feel free to find a time that works for you, and choose from the PT treatment options!

Please note: Magnify Physical Therapy has two locations - Portsmouth and Dover. You are welcome to choose a location based on your convenience and our schedule availability. Treatment sessions can occur at multiple practice locations and you are able to switch between locations during your plan of care.

Discovery Call


Physical Therapy

We provide one on one, performance physical therapy that is individualized to your needs and goals.
Each session will be provided by a doctor of physical therapy either in person or remotely.


Recovery Care

Marissa St. Germain is a doctor of physical therapy and Board Certified Neurologic Clinical Specialist located on the seacost of New Hampshire. She earned both her undergraduate degree (‘12) and her doctoral degree (‘15) from Quinnipiac University. Since then, she has practiced in NH, ME, and FL in a variety of settings (hospital, inpatient rehab, and outpatient clinics). Her neurologic residency training took place at Brooks Rehabilitation in Jacksonville, FL. In July 2020, she received her Board Certification as a Neurologic Clinical Specialist. During the neurological residency in FL, Marissa had the unique opportunity to design a neurological return to dance program which she is in the process of submitting for publication in an international journal.

Marissa has been a CrossFit athlete for the past 7 years and a lifelong outdoor enthusiast. She aims to provide performance physical therapy to empower individuals to seek the extraordinary using movement as medicine. She offers a unique rehabilitation perspective from athletes, youth, older adults, and all ages in between.

She believes the path to comprehensive health and wellness includes: 1) finding the root cause, 2) specific biomechanic analysis and collaboration with coaches to fix the pain, and 3) specific and individualized rehabilitation for recovery of the whole person. She especially likes the integration of neurologic rehab within CrossFit.

She is the owner and founder of Magnify Physical Therapy, LLC, located within the seacoast region of NH.

Marissa St. Germain is a doctor of physical therapy and Board Certified Neurologic Clinical Speci... Read More

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