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Show HN: Are you sedentary? See if you can hold your breath for 40 seconds (holdbreathfor40seconds.com) 5 points by mbappe123 on Feb 20, 2023 | past | 7 comments [flagged] Show HN: Can You Hold Your Breath for 40 Seconds? (holdbreathfor40seconds.com) 21 points by mbappe123 on Feb 19, 2023 | past | 49 comments

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