In which situation should a teacher consider leaning on support during a lesson?

When conducting a Pilates lesson, maintaining proper alignment is crucial for both the teacher's safety and the students' ability to learn effectively. Leaning on support helps the teacher stabilize their body and demonstrate positions accurately without straining or compromising their form. This not only allows the teacher to exhibit the correct posture for the students to follow but also models the importance of alignment, which is a key principle in Pilates practice. By using support, the teacher can focus more on guiding students through the movements, ensuring they understand the foundational concepts of maintaining alignment in their own practice.

In contrast, while demonstrating flexibility may sometimes benefit from support, it is not a primary reason for a teacher to lean on support during a lesson. Providing feedback typically requires a more dynamic and interactive engagement with the students, which may not necessitate leaning on support. Additionally, while resting is important, especially to avoid fatigue, it is best to do so in a way that does not disrupt the flow of the lesson or the students' learning experience. Thus, the focus on maintaining proper alignment best encompasses the situational need for a teacher to lean on support.