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 ...

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 ...

If cardio seems more like a chore and less like a fun sweat session, this 10-minute HIIT workout can help you switch it up. Presented by Allegra, this high-energy routine is a quick way to get your ...

In simple terms, the 30-20-10 workout involves 30 seconds of low-intensity activity, 20 seconds of moderate-intensity activity, followed by 10 seconds of high-intensity activity. And although we’re ...

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 ...

High-intensity interval training has transformed the landscape of modern fitness, offering scientifically proven results in condensed time frames. This comprehensive seven-day program combines intense ...

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

The best exercise for over-70s and how often to do it for longevity has been revealed in the 5-year study results ...

Team-building is taking on a new form, with companies adding high-intensity team workouts to their list of corporate ...

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 ...