slightly so that your back isn’t hollow.
Execution
Raise your upper body slowly and don’t develop any
momentum so that the entire motion is controlled by your
abdominal muscles. Turn to the left and to the right
before you lower your upper body. Don’t rest your body
on the ɻoor but rather repeat the exercise to ensure
continued muscle tension.
Variants
You can intensify the exercise by holding a medicine ball
or a weight disc in your hands. The exercise can also be
done on an exercise ball.