NASM Certified Personal Trainer (CPT) Exam 2025 – 400 Free Practice Questions to Pass the Exam

The choice of Soleus as the underactive muscle during a physical movement is accurate because it highlights the role of this muscle in maintaining proper movement patterns, particularly during activities that involve ankle stability and proper gait mechanics. The Soleus, located in the calf, is significantly involved in plantar flexion, which is essential for movements like walking, running, and jumping. If the Soleus is underactive, it may lead to compensation patterns in other muscles, resulting in inefficient movement and potential injury.

In contrast, muscles like the Latissimus Dorsi, Rectus Abdominis, and Deltoid are typically engaged during various movements and play more dominant roles in upper body strength and stabilization. The Latissimus Dorsi assists with shoulder adduction and extension, the Rectus Abdominis is crucial for spinal flexion and core stability, and the Deltoid is primarily responsible for shoulder abduction and movement of the arm. Although they contribute significantly to movement, their roles do not correspond to being classified as underactive in the same context as the Soleus.