Learn why it’s better to do abdominal crunches over a Swiss ball rather than on the ground.
The typical side-lying dumbbell external rotation overloads the middle of the range. If you use a resistance tube, it overloads the end range. Well, there’s a way to overload the start range. I learned it from shoulder specialist Dr. Dale Buchberger, and thus I coined it the “Buchberger External Rotation.” Simply lean back while performing…