Iowa State’s Fred Hoiberg posted a video on Twitter on Monday afternoon documenting a nurse-assisted stroll through the hospital halls, just four days after undergoing heart surgery.

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Hoiberg, 42, went under the knife on Friday to replace his aortic valve. Friday’s procedure came 10 years after doctors discovered that he suffered from a medical condition known as an enlarged aortic root — a discovery that prematurely ended his NBA career.