Why has the author modified the traditional roll-up exercise?

The modification of the traditional roll-up exercise is primarily aimed at avoiding excessive stretching of the hamstrings early in practice. This adjustment is important because many beginners or those with tight hamstrings may struggle with standard roll-up techniques, leading to discomfort or improper form. By altering the exercise, the focus shifts to ensuring that participants can engage their core effectively without placing undue strain on their hamstrings.

This approach helps to gradually build the strength and flexibility needed for a proper roll-up while maintaining safety and encouraging appropriate muscle activation. It allows individuals to work on their spinal articulation and core strength without the risk of overstretching, setting a solid foundation for more advanced moves and stretches in their Pilates practice.