You can always rely on a high-intensity workout to leave you feeling sweaty and exhausted. But a longer workout isn't necessarily better. And a new approach that's gaining fans on social media only requires a few minutes of your time to get major health benefits.

The workout, reduced-exertion high-intensity training (REHIT) workout, is still intense, but it's shorter than a typical high-intensity interval training (HIIT) workout, explains Stephanie Mansour, certified personal trainer and TODAY fitness contributor, tells TODAY.com.

While a regular HIIT workout can of course be short too, "these REHIT workouts have to be short," she says, "So they're like, 10 to 15 minutes max." Not only is the total workout time shorter, but so are the intervals of work that you're doing, Mansour says

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