Which of the following is NOT included in the exercises for spinal mobility and gluteal and hamstring strength?

The correct choice highlights that Long Box Rocking is not typically included in exercises aimed specifically at spinal mobility and strengthening the gluteal and hamstring muscles.

Pelvic Lift, Single Leg Bridging, and Down Stretch are all exercises that directly engage these target areas. The Pelvic Lift focuses on the glutes and hamstrings, promoting strength and stability, while also encouraging spinal alignment. Single Leg Bridging also emphasizes glute strength along with balance, as it requires engagement of the core to stabilize. Down Stretch, although primarily a stretch, is designed to promote spinal mobility and can also lead into strengthening the posterior chain effectively.

In contrast, Long Box Rocking involves a motion that is more about spinal mobility and less about specifically targeting the strength aspects of the glutes and hamstrings. Therefore, it diverges from the focus of strengthening these muscle groups, making it the answer that does not fit within the aforementioned category.