@michaeldt Having more strength/stability in my core (super subjective, I know) made my back feel better and my shoulder also felt better and better over the course of the program, which helped me train more and harder.
The most obvious thing I noticed most was how easy it was for me to stay low on my feet, like when trying to pass guard on a sitting opponent and wrestling.
I’ve also noticed that (subjectively, again) I feel less beat up after hard rolling and that I tend to outlast my training partners’ endurance.
Also, it’s definitely not so much volume that I felt gassed or sluggish on the mats.
So no downsides, IME, just upsides.