It's not planks or sit-ups — the starburst plank is torture on your abs, obliques and shoulders (so I tried it, and here's my verdict)

The starburst side plank variation strengthens the shoulders, abs and obliques. Here's why we love it at Tom's Guide.

5 muscles that you need to stretch if you sit down all day

These stretches, which loosen up the little muscles beyond your quads and calves, should never be overlooked if you spend ...

These overlooked muscles are the key to aging well

From the diaphragm to the pelvic floor, scientists say improving your core strength can protect your spine and help you move ...
Yahoo News UK

The Difference Between Sit-Ups and Crunches—and How to Do Them Correctly

Master these classic core exercises (they're not the same!). Javier Zayas Photography/Getty Images If you’re a fan of core exercises, chances are both sit-ups and crunches are a staple of your workout ...

If You Can Do This Many Sit-Ups After 55, Your Core Beats Most People Your Age

Find out how many sit-ups after 55 signal a strong, healthy core and use this 60-second test to track your strength over time.
Yahoo

Forget sit-ups — this 10-minute standing ab workout is great for your core strength and posture

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images While classic core exercises like sit-ups, planks and crunches are ...

No, not sit-ups! All you need is 12 minutes to shred your core and boost stability

Strengthen your abs and obliques with this 12-minute core circuit that you can do anywhere without any equipment bar a yoga mat.

5 Best Chair Exercises That Flatten Your Stomach Faster Than Sit-Ups After 60

Strengthen your core and slim your midsection with these five simple chair exercises that target your abs safely after 60.