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04 Jun

Why to try HIIT?

5 reasons to try HIIT

​By Finlay Macdonald for Fit Planet

It’s been called the closest thing to an exercise pill. And while it might take a bit more effort, there is now no doubt at all that high-intensity interval training is just what the doctor ordered.

Anyone who follows the latest in fitness news knows that HIIT is a hit. A big hit. But high-intensity interval training is much more than a fad – it is a scientifically backed way to build cardiovascular fitness, and research is revealing plenty more health benefits it can bestow. Here are five of the top researched reasons to put HIIT on your own workout list:

  1. ​HIIT improves lean body mass and maximal oxygen consumption, while drastically cutting the risk of heart disease. 

  2. HIIT is extremely effective at cutting stubborn and unhealthy tummy fat.

  3. In both young (18 to 30) and older (65 to 80) exercisers, a major study showed HIIT had by far the greatest activation of muscle and fat-burning capacity, when compared with other types of exercise. 

  4. HIIT has been shown to be much better than other workouts for producing excess post-exercise oxygen consumption (EPOC), meaning your body continues to use oxygen and burn fat long after you’ve stopped exercising.

  5. HIIT has been shown to be more enjoyable – in one study 92 percent of participants favored a HIIT workout over traditional moderate continuous exercise.


As Les Mills Head of Research Bryce Hastings explains, LES MILLS GRIT™ is designed to push the heart rate up as high as possible, as often as possible in a 30-minute phase.

“So we design the workout to have these very high spikes of intensity, followed by a complete recovery. And it’s those spikes that generate the types of biochemical changes that are very specific to a HIIT workout.”

We offer LES MILLS GRIT at a number of our facilities, but whilst we are closed why not see what's on offer with a free 60 day trial to LES MILLS On Demand to access your workout anytime, anywere here


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