Unstable surfaces can be utilised with a plethora of dynamic core exercises and are classically positioned under the trunk or feet to perform the curl up, sit up or
spinal flexion exercises.
A balanced workout would include a modest number of
spinal flexion exercises and, then, only if you have a healthy back, as well as few rotation exercises to target the obliques.
Crunches, sit ups and other
spinal flexion exercises are fine but as your spine moves in a variety of directions, you need to select a variety of exercises if you want to maximise your abdominal development.
Not exact matches
The plank is a great beginner level
exercise to teach
spinal stability as an anti-extension and
flexion exercise of the spine.
Deemsy explained that we wouldn't be doing any crunches or reverse crunches because those types of ab
exercises require
spinal flexion, which can increase tension on the abdominal wall, causing the left and right sides to separate even more.
Plank variations, loaded carries, and movements that require you to resist
spinal flexion, extension, or rotation are just a few examples of the types of
exercises you should be performing to strengthen your core.
You'll get a more powerful stretch in the Rollout
exercise, and a more powerful contraction, all without doing excessive and dangerous
spinal flexion.