Forget sit-ups — you only need 15 minutes and 8 moves to build a stronger core and improve your posture

a photo of a man and woman performing plank shoulder taps
(Image credit: Getty Images)

Sit-ups are a staple in many of the best core workouts, but if you’re not a fan, don’t worry — there are plenty of other effective core-building exercises out there. We've found a short, no-equipment workout that demonstrates just how effective these alternative moves can be.

Thanks to trainer James Stirling also known as the London Fitness Guy, he's formed an 8-move, no-equipment routine designed to challenge, strengthen and add definition to the muscles in your core.

The idea is to spend 40 seconds on each exercise and take no breaks which not only adds to the time efficiency of this workout but will also keep the heart rate up increasing the workout's intensity and calorie burn and helping build muscular endurance.

Watch James Stirling's 8-Move Core Workout

  1. Plank single arm raise x 40s
  2. Jack Knife x 40s
  3. Hollow Rocks x 40s
  4. Side Plank x 40s each side
  5. Hip Raise x 40s
  6. Shoulder Taps x 40s
  7. 2 Point Plank x 40s
  8. Wipers x 40s

Working through the various exercises in Stirling's routine like Planks, Jack Knives, and Side Planks, you will be targeting a wide range of core muscles, including the rectus abdominis, obliques and transverse abdominis. 

This rich variety of core moves will help you develop a well-balanced and stronger core, improving your posture, reducing the risk of back pain, and enhancing definition across your entire midsection, not just your abs

To achieve the best results, focus on maintaining good form with each exercise. Watching Stirling's demonstrations will be helpful, as will consistently engaging your core throughout the routine. Engaging your core feels like bracing your abdominal muscles as if they're about to be hit. Fortunately, the only thing you'll be hit with is a satisfying burn from a solid workout.

The intensity of this workout will also work toward building core endurance. Exercises like the Hollow Rocks and 2 Point Planks require consistent muscle contraction and control, training your core muscles to perform efficiently over longer periods.

Core endurance is crucial for everyday activities like bending, lifting, twisting, and standing for extended periods, enabling you to perform these tasks more efficiently and with less fatigue. It also enhances performance in various exercises, such as running, swimming, and sports, by providing a stable foundation for movement.

Lastly, Stirling's focus on bodyweight exercises makes the core strengthening routine extremely accessible and convenient. With just a good yoga mat underneath you during the workout to enhance comfort, no other special equipment is needed, meaning you can perform the routine anywhere — whether at home, in a park, or while traveling. Additionally, the use of bodyweight exercises allows for easy modifications to suit your fitness level.

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Jessica Downey
Fitness Writer

Jessica is an experienced fitness writer with a passion for running. Her love for keeping fit and fueling her body with healthy and enjoyable food quite naturally led her to write about all things fitness and health-related. If she isn’t out testing the latest fitness products such as the latest running shoe or yoga mat for reviewing then she can be found writing news and features on the best ways to build strength, active aging, female health, and anything in between. Before then she had a small stint writing in local news, has also written for Runners World UK (print and digital), and gained experience with global content marketing agency, Cedar Communications.

Born and raised in Scotland, Jessica is a massive fan of exercising and keeping active outdoors. When at home she can be found running by the sea, swimming in it, or up a mountain. This continued as she studied and trained to become a PPA-accredited magazine journalist in Wales. And since working and living in London, she splits her time between weight training in the gym, trying new fitness classes, and finding scenic running routes. Jessica enjoys documenting this on her fitness-inspired Instagram page @jessrunshere where she loves engaging with like-minded fitness junkies.

She is a big fan of healthy cooking and loves learning more about this area with expert nutritionists she has met over the years. Jessica is a big advocate for building healthy relationships with food rather than building restrictive attitudes towards it. When she isn’t eating or running she also enjoys practicing yoga in her free time as it helps her to unwind and benefits her performance in other sports.