Ditch sit-ups — this 5-move abs workout builds core strength and improves your posture in just 10 minutes

10-minute ab workouts: Bicycle crunch
(Image credit: Shutterstock)

I don't think I'm alone in saying sit-ups aren't fun. I don't know if it's because I need to have someone or something there to make sure my feet stay put on the ground during the full movement or because I don't like the way my back interacts with the hard ground (unless I'm working out on one of the best yoga mats) as I lift on and off the floor during a sit-up.

Thankfully, there are more ways to build a stronger core than just with sit-ups and this five move routine from trainer Kayla Itsines is just one example of many. Plus, there is no equipment involved and it only takes 10 minutes to complete. So, you can fit into your day fuss-free.

Form is essential in any workout, and ab exercises are no exception. Maintaining good form ensures you target the right muscles, avoid injury, and get the most out of your exercise. First and foremost, always engage your core—this can easily slip as you add more exercises, but it’s key to a successful workout. 

To help engage your core properly, imagine pulling your belly button in toward your spine. Additionally, focus on slow, controlled movements to maximize time under tension with each exercise. 

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 any surface!

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Sliders are fantastic at working your core hard. Simply place them beneath your hands or feet to level up your workouts for mountain climbers, archer push-ups, or anything in between. And these ones work on any surface!

Watch Kayla Itsines' 10-minute Ab Routine

Here's a little breakdown of how many reps to complete for each move and the video where Itsines demonstrates each exercise.

  • High Plank & Alternating Superman (16 reps, 8 each side)
  • Caterpillar Walk & Half Burpee (12 reps)
  • Sprawl (10 reps)
  • Extended Side Plank (20 seconds)
  • Ab Bike & Toe Tap (20 reps, 10 per side)
  • Repeat for three rounds!

This abs workout is far from a standard sit-ups-and-planks routine that can feel less and less inspiring the more rounds you do! Although there are three rounds to complete with this 10-minute session, coach Itsines has spiced up some of the moves in this routine, combining two exercises into one to add an extra challenge. Her choice of exercises also embraces a mix of positions so you aren't just crunching and twisting from the same old lying down position for the full duration of the workout.

Her choice of exercises also embraces a mix of positions so you aren't just crunching and twisting from the same old lying down position for the full duration of the workout.

You'll note there aren't any rest periods, which is because, in a high-intensity ab workout like this one, the goal is to keep your core engaged and under constant tension. This can be achieved without taking breaks between exercises, as the muscles are relatively small and can recover quickly.

However, if you're new to working out, or if you find yourself struggling to maintain good form as you progress through each round of the routine, it's perfectly fine to take short breaks between exercises. A good rule of thumb is to rest for 30 seconds to 1 minute between rounds. This will allow your muscles to recover slightly before you start the next round.

While you won’t wake up to a set of washboard abs after one session of Itsines’ routine, it’s a great workout to incorporate into your regular fitness regimen if you’re aiming to build a strong core and toned abs. This ab circuit builds strength and definition by targeting all the major core muscles, including your rectus abdominis, obliques, and transverse abdominis. These muscles work together to support your spine, improve your posture, and enhance your overall strength and stability.

If you keep up with regular ab training and notice some exercises feel like less of a challenge on your core muscles, consider adding weights like a pair of the best adjustable dumbbells to increase the intensity of your workouts and keep up the gains.

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Jessica Downey
Senior 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.

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