Which of the following is an example of a tissue stretch end feel?

The chosen option is an example of a tissue stretch end feel due to the specific nature of the motion involved in external rotation of the glenohumeral (GH) joint. In this movement, as the arm rotates outward, the surrounding soft tissues, including ligaments, tendons, and muscles, are stretched to their limit without any sudden stop or blockage, resulting in a distinct sensation. This "end feel" is characterized by a gradual resistance, indicating that the structures are being elongated rather than compressed or significantly blocked.

The sensation experienced during this movement reflects the properties of the soft tissues surrounding the joint. Tissue stretch end feels often occur with movements where soft tissue elongation is the primary limiting factor, which is the case with external rotation of the GH joint.

In contrast, other movements listed, such as flexion of the elbow, extension of the knee, and compression of the spine, may demonstrate different types of end feels, such as bony (hard) or soft tissue approximation (soft), depending on the mechanics and interactions of the joints and surrounding tissues in those specific motions.