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A training style that alternates short bursts of hard effort with brief rest periods. It is popular for helping improve cardio fitness in less time and is studied for its potential effects on insulin sensitivity.

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High-Intensity Interval Training (HIIT) discussions

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Community post · Nov 6, 2026

Can 10 minutes of hard exercise improve your fitness?

Yes—10 minutes of hard effort within a 20-minute session, two to three times weekly, can improve fitness, according to UNC’s report. The article covers Abbie Smith-Ryan’s research at UNC-Chapel Hill. Her team studied [High-Intensity Interv

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