![Heart study reveals how many minutes of exercise you need to live longer](https://ic-cdn.flipboard.com/bustle.com/9910e4c9160a9bd61cbf62c564f6fecc5914c25b/_xlarge.jpeg)
Just another reason to add HIIT workouts to your fitness routine. High-intensity interval training (HIIT) workouts have become popular in recent years …
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