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What is Grit Cardio?

LES MILLS GRIT™ Cardio is a 30-minute high-intensity interval training (HIIT) workout that improves cardiovascular fitness, increases speed and maximizes calorie burn. This workout uses a variety of body weight exercises and provides the challenge and intensity you need to get results fast. LES MILLS GRIT Cardio takes HIIT and combines it with powerful music and inspirational coaches who will be down on the floor with you, motivating you to go harder to get fit, fast.

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About Grit Cardio

  • Rapidly improve cardiovascular fitness
  • Increase speed
  • Maximize calorie burn during the workout
  • Set new fitness goals – then smash them!
  • Put your metabolism into overdrive
  • Forget hours of training – 30 minutes, twice a week is all it takes
Powered By Science

LES MILLS GRIT is scientifically-designed to shift your fitness to the next level. The HIIT effect means you increase aerobic fitness, unleash fast-twitch muscle fibers and grow lean muscle tissue, burning fat. But don’t take our word for it. See findings from the Les Mills Lab for more evidence.

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Frequently asked -questions

How fit do I need to be to do LES MILLS GRIT?

This workout is designed to challenge YOUR fitness. Exercise modifications allow everyone to push their individual limits.

What should I bring to the workout?

Wear your usual workout clothes and bring a water bottle, a towel and a big attitude. We’ll do the rest.

How many times a week should I do LES MILLS GRIT?

LES MILLS GRIT is designed to complement your training schedule. Doing a LES MILLS GRIT workout twice a week will give you awesome results.

I’m pregnant. Can I still do LES MILLS GRIT?

No, women are advised to reduce their exercise intensity during pregnancy so high intensity interval training is not recommended. We suggest talking to your doctor if you have any more questions about exercising while pregnant.

Why is LES MILLS GRIT based on movement to blocks of time, as opposed to working on the beat?

Movements to blocks of time allow you to complete maximum repetitions which allows a focus on power training – maximizing muscle output to hit top-end training zones.

The music is an integral part of the workout but doesn’t dictate the pace. As you work to your own individual max effort, you can really push your limits – and that’s a fundamental component of LES MILLS GRIT. So if moving in time to music isn’t your thing, don’t stress, it’s there to motivate you, not confuse you. The great thing is for people who love moving to the beat is that it’s definitely still an option as the music also provides you with a base tempo to move to.​


All of the LES MILLS GRIT workouts are designed with set exercises that have safety and science at their core. They’ve all been tried and tested for safety and results. If you have any specific health concerns, check with your doctor before doing a LES MILLS GRIT workout.

How do we select the music for LES MILLS GRIT?

Music selection is an extensive process that involves Les Mills Jnr searching through music for hours and hours to find specific beats per minute and beats that stay true to the essence of our program. We then fine-tune the music (speeding up, slowing down or extending pieces of music) to adapt it to fit the workout and to include sound effects to emphasise key moments. We obsess over these details to turn a good fitness experience into an amazing one.

LES MILLS GRIT is based on time intervals so we also need to select (or create) pieces of music that fit perfectly with the work and recovery times for each block of work. You also need different music to motivate you through each stage of the workout, so the music in each block is chosen to push you to your max, and then to bring you down to re-set and rest in the breaks and recoveries.