I believe the law refers to US citizens of foreign national origin while iFit is referring to Brazilian citizens.
> The Immigration Reform and Control Act of 1986 (IRCA) makes it illegal for an employer to discriminate with respect to hiring, firing, or recruitment or referral for a fee, based upon an individual's citizenship or immigration status. The law prohibits employers from hiring only U.S. citizens or lawful permanent residents unless required to do so by law, regulation or government contract.
Also, Why didn't they say "Brazilian citizens"? Why did they use the ambiguous "applicants from Brazil"?
They should probably clarify the posting.