To be a travel physical therapist (PT) or physical therapist assistant (PTA) you will first need to be license which requires for you to have a degree in physical therapy. You can choose the PTA route which is 2-2.5 years or the DPT (doctorate in PT) route which is a bachelor's degree (4 years) then 3-3.5 years of your doctorate program in PT.
More info about becoming a PT https://www.apta.org/your-career/careers-in-physical-therapy/becoming-a-pt
More info about becoming a PTA https://www.apta.org/your-career/careers-in-physical-therapy/becoming-a-pta
After that your will sit for you national physical therapy exam aka the board exam. Depending on the state you may need to take a jurisprudence exam (state law).
Once you are a licensed therapist you can now look for travel therapy job through recruiters. An average assignment is 13 weeks almost anywhere in the U.S. However the only twist to this is you must be 1. carrying a license to practice PT in your assigned state or 2. apply for a compact license if your state qualifies. Here is a site to assist you with compact licensure. https://ptcompact.org/
As far as work load it depends on your setting. There are many settings in physical therapy that can be broken up under two umbrellas: outpatient and inpatient. Under these umbrellas are more specific types of settings like orthopedic, neurologic, pediatrics, hospital-based, school based, home health, acute care, long term care, assisted living facilities, skilled nursing facilities, etc.
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