Which spring is considered the lightest on the Reformer?

The yellow spring is considered the lightest on the Reformer. In the context of Pilates equipment, particularly the Reformer, springs are generally color-coded to indicate their resistance levels. The lighter resistance facilitates movement and is often used for exercises that require more mobility, flexibility, or ease of movement.

In contrast, the other colors—like red, green, and blue—represent progressively heavier springs, which are used for strength training or for exercises that require more stabilization and resistance. The yellow spring is primarily utilized for rehabilitation purposes or to assist in movements, making it the preferred choice for lighter, more gentle exercises. Understanding this distinction is crucial for effectively utilizing the Reformer in various workout regimes, enhancing both safety and performance in Pilates practices.