According to the Challenge Point Framework, when should the level of difficulty be increased for a player?

The Challenge Point Framework emphasizes the importance of adjusting the level of difficulty in training or practice based on an athlete's development and proficiency. The correct choice highlights that the difficulty should be increased as players improve or become familiar with swing movements.

This approach ensures that the training remains challenging enough to stimulate growth without overwhelming the player. As their skills develop, it becomes crucial to introduce more complex tasks or situations to maintain engagement and promote further learning. This principle helps in preventing stagnation in skill development by continually pushing the player to adapt and advance their abilities in a structured manner.

In contrast, simply being familiar with swing movements or mastering the basics doesn’t account for the ongoing journey of skill refinement; players may be proficient but not yet ready for increased difficulty. Additionally, relying on a player's expression of frustration may not provide a consistent or reliable measure for when to advance difficulty, as players can react emotionally for a variety of reasons unrelated to their actual skill level.