Which muscle group is primarily targeted during the plank exercise?

The plank exercise primarily targets the core muscles, which include the rectus abdominis, transverse abdominis, obliques, and various deeper stabilizing muscles. When performing a plank, these muscles engage to stabilize the spine and pelvis, maintaining a neutral alignment throughout the body. The isometric hold not only strengthens the abdominal muscles but also requires coordination and balance, making it an effective way to build core stability and strength.

While the exercise does also engage other muscle groups, such as the shoulders and back, the primary focus is on the core. The shoulders engage to provide support and stability, but their role is secondary to that of the core. Similarly, the quadriceps may contribute slightly to leg stability during the plank, but they are not the primary muscles being targeted. Therefore, identifying the core as the primary focus of the plank is crucial for understanding the benefits of this foundational exercise in a fitness routine.