Reverse crunches work your oblique muscles and the rectus abdominis, the pair of muscles that run vertically down the core and are responsible for giving your core that “six-pack” look.

3. Oblique Crunches - Start lying on your back with your knees bent and your hands behind your head. Crunch up, bringing your left elbow towards your right knee. With control lower back to the ground.

Jennifer Lopez's trainer David Kirsch swears by side-plank oblique crunches for a strong core—here's why it's such an incredible abs exercise for everyone.

The program is made of nine movements, 45 seconds each, and you will work all areas of your abs. You don't have to worry about opening a new tab for your oblique exercises or scrolling all the way ...

Lie with your back flat on the floor, stomach pulled in tightly. Bend your knees to 90 degrees, keeping your feet on the floor. Place the ball on your left knee and hold it with your right hand.

“Instead of basic crunches, here are 3 core exercises I like to combine for a 10-minute core circuit,” says Colin Pasque, or Flo Lyfe as he’s known on socials, who runs Flo Functional Training.

The basic crunch is an excellent abdominal strength training exercise to work your upper abs. However, done incorrectly, crunches can give you backache, put strain on your neck and create tension ...