Several researchers have suggested that  twisting of the trunk is associated  with low back pain. the 1st issue we need to deal with is to distinguish  the idea of twisting  from generating twisting torque.
Torque  in the torso can be achieved  whether or not the spine itself is twisted.
In general moderate twisting isn’t dangerous. over the years the debates have included  twisting quickly and breaking the speed by hitting the end range of motion,  back in 1970, Farfan  suggested disc twisting  could damage  the collagen fibres  in the annulus, especially if a neutral arch had been lost.  Other reports say that twisting is less dangerous as the facet forms a mechanical stop , thus its the facets that can get injured.
What is  Twisting torque? Imagine a twist that applies or transmits force!.As no muscle  is designed (as a primary function),  to create twisting torque all muscles are  contracted, this increases compressive load. 50nm of extension, creates 800 newtons of spinal compression.
Generating high torque, when the  spine is twisted  is problematic. In short are you twisting… well, Ok!  or are you twisting through your spine to load up an axe swing … probably not so good!
Ill show you in a future “Note” how to generate force through your hips and not through your back. But for now, repeated spine flexion will, according to Aultman et al ( 2005), will lead to discogenic trouble.