The two oblique muscles are the internal and external obliques. They're important for core stability and a slimmer waist. Try the 9 best oblique exercises.

This plank-free, 10-minute core workout taxes the upper and lower abs, along with your obliques, to help build stronger and more defined muscles.

Challenge your core and obliques with this quick 5-minute ab workout from Supernatural coach Raneir Pollard. This group fitness class is fun for all.

Your abs are also one of the most important muscles in your body and having a stronger core will help your strength and your ...

These rotational and unilateral movements will strengthen the internal and external obliques for better core stability and a slimmer waist.

The best at-home ab exercises with equipment You can increase the challenge if you have some equipment at home, such as a kettlebell, a pair of dumbbells, resistance bands, or a medicine ball.

No crunches, no floor work—just 5 standing moves that sculpt your core, burn fat, and protect your back after 40.

Sculpt a leaner waistline after 40 with these 4 daily exercises that beat cardio by building strength and core stability.

Forget Russian twists. This standing ab workout uses 3 exercises and 15 minutes to chisel your oblique muscles.

So, after coming across fitness trainer Lindsey Bomgren’s 15-minute Pilates ab workout, I decided to give the low-impact class a go without spending a dime.

The Daisy Keech ab workout for an hourglass waist has had over 23 million views, so WH Fitness Editor tried it. Here's what happened, and the experts' verdicts.

To make Russian twists an effective ab workout, slow the movement down and don't add a lot of weight prematurely, trainer Miriam Fried told Insider.