For fitness enthusiasts who need a little cardio variety, HIIT (or high-intensity interval training) has long been a popular choice. According to a study in Biology of Sport, HIIT — which pairs short ...

Navaretta recommends the following HIIT workout, where you'll do each exercise for 30 seconds, with 15 seconds of rest in between. Each cycle will take just under four minutes, and you'll want to ...

These 20-minute HIIT workouts are the most efficient ways to train when you're low on time but want to burn fat and build muscle. Before we begin, it’s important to recognize when you’re ...

but the workouts themselves are pretty short. “Excluding a warm-up, HIIT usually lasts for a maximum of 20-30 minutes, and instead of working to sets and reps, you are working for a time limit ...

If you hate running, the good news is it’s not the only way to burn calories and build muscle — HIIT training is a great alternative, especially if you’re short on time. In fact, you’re ...

Keep scrolling for 21 great high-intensity workout options to try that range from five to 45 minutes and include all different protocols. Note that since HIIT has such a broad definition we used ...

Here's an example of a basic HIIT rowing workout. Total time: 12 min. To avoid hitting a fitness plateau, and to continue improving your conditioning, add an extra work interval and/or reduce the ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images If you hate running, the good news is it’s not the only way to burn ...