Forget sit-ups — this 4-move kettlebell workout builds a stronger core and increases full-body strength

a man performing a kettlebell workout outside
(Image credit: Getty Images)

Not a fan of standard abs workouts that require you to lay on the floor and bash out as many sit ups and planks that your core can hack? We don't blame you. This is why we've found a versatile yet efficient core workout that only involves a kettlebell and four moves. 

Not only does this workout from fitness trainer Tanya Poppett work your deep core muscles, but it also works muscle all over your body all the while challenging your cardio fitness. Sound like a fun challenge? You just need to get your hands on one of the best kettlebells and you are ready to get stuck in. 

Poppett uses a 22lbs/10kg kettlebell for her workout but her focus isn't on how heavy you can lift and instead is on 'maintaining smooth and quality form'. With that in mind, pick a sensible weight that will allow you to complete the full workout and challenge your muscles. 

If you tend to workout at home over the gym then you should consider investing in an adjustable kettlebell which allows you to adjust the weight on demand without requiring multiple kettlebells.

BowFlex SelectTech 840 Kettlebell: was $199 now $149 @Amazon

BowFlex SelectTech 840 Kettlebell: was $199 now $149 @Amazon
The Bowflex SelectTech 840 is a great adjustable kettlebell for home workouts due to its versatile weight range, adjustable from 8 to 40 lbs with a simple dial turn, and its space-efficient design that replaces six individual kettlebells. However, Bowflex recently filed for bankruptcy, so while the kettlebell is still available, the associated app may not be supported for much longer.

How to do the 4-move kettlebell workout

If you have experience with a standard HIIT workout (High-Intensity Interval Training) then you'll know the drill with this routine. Except, you'll be adding some resistance making this a High-Intensity Resistance Training session (HIRT).

HIRT workouts involve performing resistance exercises at a high intensity with minimal rest between sets and the overall aim is to build strength and muscle while also boosting your cardiovascular fitness. 

So for this routine you'll be working on each move for 40 seconds, taking 20 seconds of rest between each exercise and repeating the full circuit a total of five times over. Be sure to have one of the best water bottles by your side for this workout as things are going to get sweaty and you'll want to keep your hydration levels strong.

Below is a list of the exercises and if you want to ensure you get the form right for each, you'll find Poppett's demonstrations underneath.

When you incorporate kettlebells into your HIIT training the weight requires continuous engagement of the core muscles. Exercises like swings, snatches, and cleans force your core to brace and control the kettlebell.

Therefore, the better your form the greater the engagement and the results can include stronger core muscles, better posture and reduced risk of injury in both sport and daily activities.

The additional weight is also a reliable way to boost your full-body strength. Kettlebell exercises are typically compound movements that engage multiple muscle groups simultaneously.

For example, movements like the kettlebell swing and clean and press work the legs, back, shoulders, and arms all at once. Not only is this an efficient way to workout but it’s also a useful tool for improving your functional strength.

Additionally, HIRT can help build on your muscle endurance. The high-intensity nature of these workouts, made up of short bursts of intense activity followed by brief rest periods, trains the muscles to sustain effort over time. This type of training is designed to improve both muscular and cardiovascular endurance.

Lastly, regular practice of this style of training will contribute to fat burn. The intense effort required for these workouts elevates the heart rate and increases caloric expenditure both during and after the workout.

Your body will experience an afterburn effect also known as excess post-exercise oxygen consumption (EPOC), which essentially means that the body continues to burn calories at an elevated rate even after the workout is complete.

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Jessica Downey
Fitness Writer

Jessica has been a fitness writer at Tom’s Guide since 2023, bringing three years of experience writing about health, fitness, and the great outdoors. Her passion for exercise began during her childhood, where she spent weekends hiking and competing in local athletics club events. After earning a master’s degree in journalism from Cardiff University, Jessica found the perfect way to combine her love of storytelling and fitness into a career.

Jessica is passionate about testing fitness gear and tech, using her reviews to help readers make informed buying decisions. She ran her first marathon in April 2024, finishing it in 3 hours and 48 minutes. Through her training, she’s developed a deep understanding of what it takes to grow as a runner, from effective workouts and recovery techniques to selecting the right gear for every challenge.

When she’s not at her desk, Jessica enjoys spending time in the kitchen crafting new recipes, braving cold water swims and hiking.