Which of the following is NOT included in the Powerhouse?

The Powerhouse, in the context of Pilates, refers to the central area of the body that includes major muscle groups that contribute to strength, stability, and control during movement. This area typically encompasses the abdominals, inner thighs (adductors), and gluteals, as these muscles work together to provide support for the spine and facilitate movement.

The soleus, while an important muscle located in the calf that helps with posture and walking by controlling the foot, is not included in the Powerhouse. Its primary function is related to lower limb movement and stability rather than core strength and stability, which is what the Powerhouse represents. Thus, identifying the soleus as not part of the Powerhouse is correct, as it is outside the main focus of core-centric muscle groups that Pilates emphasizes for effective practice and movement efficiency.