After Bruce confirmed his transition in a US TV interview on Friday night, Alice took to Instagram to share thoughts of her own in a now-deleted post.
According to BBC News, she wrote: "If you were a woman no one would have heard of you because women can't compete in the decathlon. You would be a frustrated young athlete who wasn't given a chance.
"Until women are paid the same as men, then playing at being a "woman" while retaining the benefits of being a man is unfair. Do you have a vagina? Are you paid less than men? Then, my friend, you are a woman."
Alice then began to receive criticism from other Instagram users unhappy at her comments. According to reports, she then deleted her posts before writing another message for followers.
"I am a supporter of anyone who wishes to explore their gender identity. Sometimes language doesn't express the spectrum of identity sufficiently, as in this case. I am also a believer in equal rights for all… whatever your race, colour or creed."
Alice is also said to have posted: "I am saying that we have to refine the language on this topic so all men, women and transgenders are accurately represented in their process of self-identification. Maybe this needs a little thought. Thank you for engaging with me on this subject, because I felt confused and now I feel enlightened and like I know what education I need to move forward. I appreciate the time and thought. #smartbunch."
Bruce confirmed his transition in an interview with Diane Sawyer on Friday evening, saying: "For all intents and purposes, I'm a woman.
"People look at me differently. They see you as this macho male, but my heart and my soul and everything that I do in life - it is part of me.
"That female side is part of me. That's who I am."
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