What is it?

The Grit series is a fun and challenging high-intensity workout. It is designed to challenge your coordination, aerobic fitness levels and mental toughness.
This workout burns loads of calories and helps tone the body fast using effective HIIT training to activate the epic effect. This means you will be exhausted after the workout but will continue burning lots of calories for up to 30 minutes after the class.

There are 3 variations of the class to keep you on your toes but all offer the same great cardio and calorie burning results!


Grit Cardio: focus on speed of repetitions to spike heart rate


Grit Plyo: focus on explosive movement to spike heart rate


Grit Strength: focus on full range of motion to spike heart rate

The science behind Les Mills grit

There’s no disputing it. It’s scientifically proven that LES MILLS GRIT works. HIIT cardio training drives you to burn calories for hours after the workout, increase aerobic fitness, activates the fast-twitch muscle fibers and grows lean muscle tissue which increases fat burn. Don’t just take our word for it, read about why HIIT works here and the science behind LES MILLS GRIT here.


30 – 60min

Select the day below to see the times & durations:

Frequently asked questions

All you need to know about Les Mills Grit

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.

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

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

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.

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 allow 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.

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.


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.


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