The technology to test oxygen levels is called VO-2 Max. 69 News Reporter Bo Koltnow put the new tech to the test. Wearing a facemask resembling a villain from Batman, but the mask measures your ...

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Lauren Kostiuk is an award-winning journalist who joined the Local 4 team in April 2025. She spent several years honing her skills in newsrooms across the country before returning home to Metro ...