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.
It's important for you to limit
flexion in this pose by resting your chest and belly on your thigh,
because excessive
spinal flexion in combination with a sidebend can be even more dangerous for the disks and other soft tissue around your spine than excessive
flexion on its own.