It started in a car, not a clinic.

“He believes that listening to each patient’s unique story is key to helping them move better.”

Seth Greiner graduated from Boston University in 2005 with a bachelor’s and a master’s, cum laude, and picked up his personal training certification through the National Academy of Sports Medicine while he was still there. Then he spent roughly a decade working hospitals, schools and outpatient clinics across the tri-state area.

He learned a great deal in those rooms, including what he did not want to build. Three or four patients on the floor at once. An aide running the exercise program. A thirty minute slot that becomes ten minutes of real hands-on care once the documentation is accounted for. Nobody in those buildings was careless. The structure simply made undivided attention impossible.

So in 2015 he left and launched a mobile practice, delivering physical therapy directly to patients and clients across the Hamptons. One patient at a time, in their own environment, for the full session. In 2021 that became a clinic in Speonk. Quogue followed. The rule survived contact with both buildings: no assistants, no aides, just you and a licensed physical therapist.

Seth lives in East Quogue with his wife and their two daughters. He is a Steelers, Penguins and Mets fan, he trains with high intensity interval work and yoga, he plays tennis, and he is the head coach of Rock Steady Boxing Hampton Bays, a noncontact boxing class for people with Parkinson’s disease.

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