What happens when a golfer sways too much during their backswing?

When a golfer sways too much during their backswing, it is primarily associated with a shift in weight distribution. Specifically, the weight may move to the outside of the back foot. This shift can create instability in the golfer's stance and ultimately affect their ability to deliver an effective swing as it can lead to loss of balance and repeated swing inconsistencies.

Understanding the mechanical aspects of a proper backswing is vital for maintaining a solid foundation throughout the swing. When the weight is centered or shifted appropriately, it supports a better transition into the downswing. However, excessive swaying compromises this process.

To elaborate, enhancing power and promoting a consistent swing plane are qualities derived from a well-balanced and controlled swing. Swaying typically detracts from, rather than enhances, these elements. Additionally, early extension is related to how a golfer maintains their spine angle and posture throughout the swing, which is also negatively impacted by excessive swaying. Thus, option C accurately describes the effect of swaying too much, as it directly pertains to the mechanics of weight distribution during the swing.