That "link" is usually a weak midsection or poor "core strength." A strong upper body linked together by insufficient core strength is one of the most common mistakes made in training. Because of this, many athletes suffer from low back problems, weak abs, and weak rotary movements.
Athletes aren't the only ones suffering from this weak link. Eighty million Americans suffer from low back problems and 80% of these problems can be controlled by proper conditioning of the midsection. The Core Strength Rack was developed to get rid of the weak link.
