What is rib cage placement aimed at achieving?

The goal of rib cage placement is primarily focused on achieving the alignment of the rib cage over the pelvis. This alignment is crucial in maintaining proper posture and ensuring that the body's center of gravity is well-balanced. When the rib cage is correctly positioned, it helps facilitate more efficient movement patterns during exercises.

Proper rib cage placement aids in the activation of core muscles, supports the spine, and enhances overall functional movement. This alignment allows for a more efficient transfer of forces throughout the body, which is essential in practices like Pilates. Effective alignment also helps to prevent strain and injury, ensuring that movements are performed safely and effectively.

The other options, while important aspects of overall fitness and performance, do not focus specifically on the goal of rib cage placement in the context of Pilates practice. Optimal body weight, increased upper body strength, and enhanced agility are outcomes that may result from a well-executed practice but are not the primary aim of rib cage alignment itself.