The tort that the owner of the fitness center is committing is known as Defamation in law.
Basically, tort refers to an action made by someone which gives rise to injury or harm to another person and such actions can be sued in court of law.
Defamation is part of tort in law and refer to the statement made by someone which harms another's party's reputation.
When the owner of the larger fitness center is posting derogatory comments about Alicia, the person is committing an offence of Expressed defamation.
Expressed defamation is one that is written and can be easily proved while Oral defamation is one that is been spoken.
Therefore, Alicia can sue the fitness owner for damages because she suffered loss of reputation because of the derogatory statement made by him.
Learn more about Defamation here
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