CPT is more focused on personal training and doesn't require a 4 year degree. The CSCS is geared more towards sports performance (though many gym trainers do have it, as it's considered to be the gold standard) and requires a bachelors to sit for the exam.
I have a degree so just went for the CSCS. Either is fine for a normal PT job, but if you want to move elsewhere in the industry a CSCS would help.
Most gyms offer benefits to full-timers, but usually after a few months -but of course it depends on the gym.
Hope this helps.
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Kuri is not aging well
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