You do not always need to rotate to build rotational strength. This long lever shoulder taps exercise is a great way to build rotational power in a safer way. Basically, when you perform this exercise your core will work hard to ensure your body does not rotate. Exercises that make your torso resist rotation is a great way to activate your core. They are relatively safer compared to exercises such a land mind rotations, etc. I recommend doing performing both but these anti-rotation and rotation exercises for building rotational power anti-rotation resistance exercises should definitely be implemented in programs since they are safer and a better alternative to those who have back injuries.