The ability to strike on the ground is key in MMA. Your body will adapt to the training you put it through and the more that your training resembles what happens in fights the better.
Often times you have to striking loose and fast, and then squeezing to hold or submit, and the. Immediately back to striking…. there is often no rhythm involved, you strike when you can and control, hold and squeeze when you have to. The goal is to randomly switch back and forth to mimic what happens in fights.
The Ground and Pound, Smash and Squeeze drill can be seriously tiring. The more tired you get the more focused on precise hitting you have to be.