What happens to the height of the trunk during the "criss-cross" as fatigue sets in?

During the "criss-cross" exercise, as fatigue sets in, the trunk may progressively lower. This is often due to the weakening of the core muscles that are responsible for maintaining the elevated position of the trunk. When fatigue occurs, these muscles may struggle to maintain their strength and stability, leading to a decrease in trunk height. This lowering is a common symptom of muscle fatigue where the body naturally compensates by reducing the intensity of the effort to avoid strain or injury. Maintaining proper form and height is crucial for the effectiveness of the exercise, and awareness of this decline can help instructors encourage students to focus on their core engagement throughout the movement.