Which conditions are considered contraindications for the Swan exercise on the Reformer?

The correct answer identifies a variety of conditions that pose risks when performing the Swan exercise on the Reformer. The Swan exercise involves extension of the spine, which requires careful consideration of physical limitations and health conditions.

Pregnancy can alter body mechanics and create instability, making certain movements potentially harmful. Shoulder replacement should be approached with caution, as the movement could stress rehabilitation or recovery of the shoulder joint. A slipped disc can exacerbate pain and discomfort when the spine is extended, increasing the risk of further injury. Osteoporosis also presents a significant risk since this condition weakens bones, increasing susceptibility to fractures during movements that involve spinal extension or loading.

The combination of these conditions significantly affects the safety and effectiveness of the Swan exercise, thereby necessitating modifications or avoidance altogether to protect the individual from physical harm.