Match the following exercise to the muscle it primarily targets: Single Leg Extension.

The Single Leg Extension primarily targets the hip flexors. This exercise involves extending one leg while stabilizing the pelvis and engaging the core, which emphasizes the action of the hip flexors as they work to lift and control the extended leg.

In this movement, the hip flexors, which include muscles such as the iliopsoas, play a crucial role in knee extension and maintaining pelvic stability. The isolation of one leg allows for enhanced focus on these muscles, promoting strength and functionality in movements that require hip flexion.

While other options represent important muscle groups, they do not serve as the primary focus of the Single Leg Extension. Each of those muscles has distinct functions that are not as directly engaged during this particular exercise. Understanding which muscle groups are activated helps in tailoring workout routines that target specific areas of the body effectively.