Which of the following exercises is considered a fundamental reformer exercise?

The Hundred is recognized as a fundamental reformer exercise because it effectively emphasizes key principles of Pilates, such as breath control, alignment, and core engagement. This exercise is typically performed in a supine position on the reformer and incorporates rhythmic breathing while engaging the core and the limbs. The Hundred is designed to build endurance and promote whole-body awareness, making it a foundational movement that connects to more complex exercises.

Moreover, The Hundred serves to intensify the mind-body connection that is central to Pilates practice, helping individuals focus on controlled movements and proper form. Its adaptability allows it to be modified for various fitness levels, which further solidifies its status as a fundamental exercise within the Stott Pilates repertoire.

In contrast, other options such as the Plank, Burpees, and the Squat may not align with the specific principles of Pilates or are considered to be more advanced movements that place a stronger focus on strength and cardiovascular endurance rather than the core fundamentals associated with Pilates training.