Either by widening stance or by elevating the back of the foot like you said. Some people's hips are built in such a way that they can't squat deep without doing one or the other

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you can get foot elevation stuff on amazon of put a plate down and use ur heals on there

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Depends on how flexible your Achilles is. I couldn’t do it until I started ballet. Totally fine to shift to just the ball of your foot when you need to :)

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