What negative impact does C-Posture have on swing mechanics?

C-Posture, characterized by a rounded back and forward shoulders, significantly restricts spinal rotation. This limitation adversely affects a golfer's ability to turn their upper body effectively during the swing. An efficient golf swing relies heavily on proper spinal rotation to generate power and maintain balance throughout the motion. When spinal rotation is limited, it can lead to compensatory movements, potentially causing inconsistent ball striking and a decrease in overall swing accuracy.

The other options do not accurately represent the primary negative impact of C-Posture. While grip strength and flexibility might be affected indirectly, the most critical factor in terms of swing mechanics is how C-Posture specifically hinders the rotational capability of the spine during the swing. Enhanced power delivery is not a consequence of poor posture; instead, a proper posture supports optimal power generation and swing dynamics. Hence, the negative impact of C-Posture on swing mechanics is most clearly defined by its limitation on spinal rotation.