Which exercise would be inappropriate to include for a tight hamstring-focused session?

In a session specifically targeting tight hamstrings, the Short Spine Massage might be considered inappropriate because this exercise emphasizes articulation of the spine while the legs remain elevated and engaged. The focus of the Short Spine Massage is on the spinal alignment and movement rather than directly stretching or targeting the hamstrings.

In contrast, other exercises listed, such as the Ballet Stretch Front and Basic Tree, actively focus on elongating and stretching the hamstrings through various positions. The Side Stretch can also indirectly promote hamstring flexibility by allowing for a more elongated posture that can beneficially affect the muscles in the back of the legs.

Thus, the reason the Short Spine Massage is not suitable in this context is that it does not directly address tight hamstrings and might even maintain tension in those muscles rather than effectively relieve it.