Most of us have, at some point, found ourselves on a padded table in a sunlit clinic, working through a set of resistance-band exercises while a therapist counts repetitions and quietly corrects our form. It is easy to assume the profession watching us is fairly young. It is not. According to the American Physical Therapy Association's centennial materials, the formal U.S. organization turned 100 in 2021, but the practices it codified reach back several thousand years.
I spent thirty-odd years as a reference librarian, and I will admit that physical therapy is a field where the historical sources are unusually rich and unusually tidy. The APTA maintains a milestone timeline. The Walter Reed archives still hold rosters from the First World War. And the patient-facing literature has caught up to the science in a way that, frankly, not every medical specialty can claim. So if you have ever wondered who the first physical therapists actually were, or why your granddaughter's PT program now takes seven years instead of four, the answers are well documented.
Ancient origins: water, sun, and the moving body
It is worth noting that the core insight of physical therapy — that purposeful movement, applied heat, and skilled touch can restore function — is not modern at all. Hippocratic writings from the 5th century BCE describe hydrotherapy and therapeutic exercise. The Romans built their bath complexes with rehabilitation in mind as well as recreation. Chinese practitioners codified tui na manual therapy and movement systems that overlap, in surprisingly specific ways, with what a contemporary clinician would call neuromuscular re-education.
What changed in the 19th century was not the impulse but the institutional structure. Per Henrik Ling, the Swedish gymnastics teacher, formalized a system of medical gymnastics in the 1810s. British nurses and midwives organized as the Chartered Society of Physiotherapy in 1894. The pieces — manual therapy, exercise prescription, electrotherapy, hydrotherapy — were on the table; what the field still needed was a profession.
The reconstruction aides and the founding of an American profession
The American story turns on a single sentence: the United States entered the First World War with no civilian physical therapy profession to speak of, and exited with the foundation of one. The Surgeon General's office, faced with thousands of wounded soldiers, recruited women trained in physical education and massage and assigned them the title "reconstruction aide."
Mary McMillan, who had studied physiotherapy in England before the war, was appointed the first reconstruction aide in February 1918 and organized the physiotherapy department at Walter Reed General Hospital in Washington. She subsequently directed an emergency training course at Reed College in Portland that prepared more than 200 aides for deployment. By the war's end, roughly 800 reconstruction aides had served — the figure cited in the older Catalogs.com article checks out against the APTA's own count.
When the war ended and the program faced demobilization, McMillan and her colleagues organized. On March 24, 1921, the American Women's Physical Therapeutic Association elected McMillan its first president. The organization dropped "Women's" the following year and became the American Physiotherapy Association; it took its present name, the American Physical Therapy Association, in 1947. There is a strong argument that no other American medical specialty owes quite so much to a single cohort of women.
Polio, two more wars, and the postwar expansion
The poliomyelitis epidemics of the early and mid-20th century did for physical therapy what wartime did for surgery. Sister Elizabeth Kenny's hot-pack and movement protocol — controversial when she introduced it in the United States in 1940 — reshaped how clinicians treated paralytic illness and pushed physical therapy into hospitals that had not previously employed it.
The Second World War, then Korea, then Vietnam each generated cohorts of injured veterans whose recovery depended on rehabilitation services. According to APTA materials, the demand outstripped supply for most of the 1950s and 1960s, and the federal Vocational Rehabilitation Act of 1954 funneled meaningful funding into training programs. By 1970, physical therapy was a recognized specialty with state licensure in all fifty states.
Education: from certificate to bachelor's to doctorate
If you trained as a PT in the 1950s, you almost certainly held a bachelor's degree in something else — often physical education — and a certificate in physical therapy. New York University offered the first dedicated bachelor's of science in physical therapy in 1927. By APTA policy, every entry-level program had to award at least a post-baccalaureate degree by December 31, 1990; in practice this meant a master's.
Creighton University graduated the first Doctor of Physical Therapy class in 1996. In January 2016, the Commission on Accreditation in Physical Therapy Education made the DPT the only degree it would accredit. So when a younger relative tells you she is in her third year of a DPT program after finishing a four-year undergraduate degree, she is not exaggerating — entry to the profession in 2026 is, by design, a doctoral-level credential.
What physical therapy looks like in 2026
For readers in their 60s and beyond, three current developments are worth knowing about.
- Direct access. All fifty states now permit some form of direct access to a physical therapist without a physician's referral, though the scope of that access varies considerably state by state. The APTA publishes an annual state-of-direct-access report that is reasonably plain-spoken about the limits.
- Medicare and the therapy cap. The hard dollar cap on outpatient therapy was repealed several years ago and is being further loosened in the 2026 Medicare physician fee schedule. Coverage is no longer the cliff it once was, though the standard 20 percent coinsurance after the Part B deductible still applies.
- Telehealth. Medicare's pandemic-era telehealth flexibility for physical therapists has been extended in a series of short-term renewals; as of this writing, the most recent extension runs through January 30, 2026, with the profession lobbying for permanence. If your clinic offers virtual visits, it is worth asking how long their current authorization runs — the rules genuinely are in flux.
A practical takeaway
What I have learned, both from research and from my own brush with a frozen shoulder two winters ago, is that physical therapy in 2026 rewards patients who treat it as a partnership rather than a prescription. Ask your therapist what the goal of each exercise is. Ask whether your insurer requires a referral or whether you can self-refer in your state. Ask what the evidence base looks like — a well-trained DPT will not be offended; she has spent seven years learning how to answer that question.
The line from a Roman bath to a Walter Reed reconstruction aide to your daughter-in-law's clinic is longer and stranger than most patients realize. It is, on balance, a heartening one.
