Andrew Huberman· PhD
HIIT, H-I-I-T, is defined as submaximal, so 80% to 100% of VO2 max bursts of activity that lasts 60 to 240 seconds, interspersed with less intense recovery periods.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
HIIT, H-I-I-T, is defined as submaximal, so 80% to 100% of VO2 max bursts of activity that lasts 60 to 240 seconds, interspersed with less intense recovery periods.
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Marty likes to talk about it being like when when you're when you're doing it doing the interval that you you're doing vigorous exercise and that could be different for a lot of people depending on your your Fitness level but essentially it's you're you're working harder than you can't really have a conversation when you're doing that interval so you're going really hard most people are about 85 80 to 85% at least maximum heart rate for the interval and then they you know they have these periods of of recovery and then go back to the working SE part the the interval again