No, not sit-ups — use this 5-move workout instead to strengthen your core and improve your posture

a woman doing a crunch on the floor
(Image credit: Getty Images)

Sit-up haters, we've got a sit-up free workout ready and waiting for you to use—but if you love sit-ups, feel free to tack them onto the end of this five-move bodyweight routine. 

The one thing we would advise acquiring before getting stuck into the core workout is an exercise mat (such as one of the best yoga mats), this adds a little extra protection for your back and joints during a floor-based routine like this one. 

Developed by trainer Cindy Yu, this workout is all about challenging the muscles in your core to strengthen and tone your midsection. It's an equipment-free session so you can take these moves with you to the gym, on vacation, or just enjoy doing them from the comfort of your own home. 

Let's take a look at the exercises, learn from Yu's demonstrations and explore some the benefits of the core building session.

Watch Yu's five-move core workout

You'll spend 30-45 seconds on each exercise and make sure you spend this amount of time on each side of the body per move. The aim is to complete four to five rounds in total but depending on how regularly you train your core, you may need to allow yourself short breaks to help you finish the full workout with proper form. 

These are the moves you'll need for this short workout, but if you're new to any of them or could use a refresher, you can check out Yu's demonstrations on Instagram before getting started. 

  • Plank knee drive pike
  • Curl leg kick out
  • Bear pose rotate and reach
  • Reverse plank knee in leg lift
  • Kick out leg extension

There's nothing wrong with sit-ups — in fact, they're great for targeting your rectus abdominis (the 'six-pack' muscle). However, we understand that they can get a bit repetitive when they frequently appear in many of the best ab workouts.

The good news is, you aren't losing out on any core gains by ditching the sit-ups and instead giving Yu's five move routine a shot. Her collection of exercises engage various muscles in the core, including the obliques, transverse abdominis, and lower back. 

The more muscles in the core you engage, the greater strength gains you can make, and you can improve things like stability and posture. And this has practical benefits, too, as it's no secret that a strong core is the unsung hero of good posture.

A bit like how a well-built building relies on strong foundations, the core muscles are the foundation of your mid and upper body. In strengthening the muscles of your abdomen, lower back, and pelvis, you can create a robust framework that keeps your spine aligned and prevents slouching or overarching. 

More from Tom's Guide

Category
Arrow
Arrow
Back to Yoga Mats
Colour
Arrow
Price
Arrow
Any Price
Showing 10 of 132 deals
Filters
Arrow
Our Review
2
Gaiam Yoga Mat Classic Solid...
Amazon
Our Review
3
Gaiam Classic Yoga Mat 3MM...
Walmart
(Black)
Our Review
4
manduka PRO Yoga Mat 85...
Zappos
Our Review
5
Manduka PRO Yoga Mat, Size...
DICK'S Sporting Goods
Our Review
6
Gaiam Kids' Yoga Mat -...
Target
Our Review
7
Gaiam Stay-Put Yoga Mat...
CVS Health
Our Review
8
Gaiam Stay-Put Yoga Mat...
CVS
(Black)
Our Review
9
Manduka Pro Yoga Mat Black...
Amazon
Our Review
10
Gaiam No-Slip Yoga Mat Towel,...
Amazon
Show more
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.

Read more
a man doing a sit up
You don’t need crunches to build a strong core — here are 6 exercises to try instead
woman doing a crunch
No, not sit-ups — trainer shares these 6 exercises to blast your core in just 12 minutes
woman doing side plank exercise
Ditch sit-ups — strengthen and define your core with 1 dumbbell and this 5-move ab workout
a photo of a woman doing abdominal crunches on her back
No equipment, no crunches — build a stronger core with this 5-move workout
Woman performing a bodyweight core workout on a yoga mat with elbow and knee touching in a bicycle exercise
Forget regular planks — try the bear plank swivel and 5 other great moves with this bodyweight core workout
Man performing an abs workout outside
Forget crunches — build a stronger core with this 10-minute standing abs workout
Latest in Fitness
the Saucony Ride 17 running shoe in the Orchid/Silver colorway
I trained for a marathon in this Saucony running shoe and it's now 45% off in Amazon's Big Spring Sale
a photo of a woman with strong abdominal muscles
Forget the Reformer —5 pilates exercises you can do with just a resistance band
a person with muscular calves running
Physio says runners need these 3 calf strength variations in their training — here’s why I’m finally listening
a photo of a woman doing a plank outside
I did 70 walking plank push-ups every day for one week — here’s what happened to my upper body
Adidas sneakers in front of a wall
Mega Adidas sale is live from $8 at Amazon — 21 deals I’d buy now on sneakers and apparel
Woman holding a protein shake with a towel around her shoulders in a light and bright kitchen
Protein may help you sleep better — a nutritional therapist explains how
Latest in Features
Rusty pruning shears
How to spring clean your gardening tools — two household ingredients that really work
Wordle answer for #1,244, Thursday, November 14
I used ChatGPT to help me win at Wordle — here's what happened
a photo of a woman with strong abdominal muscles
Forget the Reformer —5 pilates exercises you can do with just a resistance band
A hand feels the temperature regulation of the SPRINGSPIRIT Dual Layer Mattress Topper.
What is a bamboo mattress topper and should you buy one?
2025 Mini Cooper Countryman SE All4 review.
I drove the Mini Cooper Countryman EV for a week — here’s my pros and cons
Troubadour Apex 3.0 Backpack
I tested this laptop backpack for 6 months — and it’s one of the best purchases I’ve ever made