In TODAY.com's Expert Tip of the Day, a trainer explains how incorporating HIIT into a weekly workout routine can boost one's metabolism and help with weight loss.

This month we will be alternating between HIIT walks and a simple HIIT routine that uses just your bodyweight to get your heart rate up. On days when we’re doing walking workouts, you have three ...

HIIT workout founded by a Japanese Olympic coach that uses periods of intense exercise and rest to burn calories.

That HIIT workout routine is upping your cortisol (stress) levels. The head of research at Les Mills wants you to keep it under 40 minutes per week. “Cortisol is not particularly a ‘bad’ hormone, it’s ...

Looking for a workout that has speed, strength, and power wrapped into one? Try high-intensity interval training (HIIT), a method that packs a punch in a shorter amount of time compared to other ...

Get ready for a challenge with HIIT workout from fitness trainer Natalie White. Presented by CALIA, this session doesn't hold back with cardio-intensive exercises that will leave you ready for the ...

Torch your muffin top with 9 expert-backed HIIT moves that burn fat, boost metabolism, and sculpt your waist in 15 minutes.

If you're struggling to squeeze in your HIIT workout, this dance cardio class is for you. Host and choreographer Kaleila Jordan is here to guide you through a dance workout that will get your heart ...

Torch calories and sculpt your legs with this high-intensity dumbbell HIIT routine! No gym needed — just grab your dumbbells ...

All products featured on Self are independently selected by our editors. However, we may receive compensation from retailers and/or from purchases of products through these links. Like other HIIT ...

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 ...