ISSA Trainer Practice Exam 2026 – Complete Study Resource

The soleus is the muscle located directly beneath the gastrocnemius and shares similar functions, particularly in actions related to the ankle. Both the soleus and the gastrocnemius are part of the calf muscle group and play essential roles in plantarflexion, which is the movement that points the toes downward. The soleus is particularly active during activities such as walking, running, and standing, where it helps maintain stability and support the body during movement.

This muscle’s functionality is critical, especially during endurance activities, as it is more fatigue-resistant than the gastrocnemius, which is important when sustaining prolonged activities. The soleus works in conjunction with the gastrocnemius to provide effective power for movements that require the foot to be flexed downwards. The other muscles listed, such as the quadriceps, tibialis anterior, and hamstrings, serve different functions and are located in different regions of the leg, which makes them not applicable in this context regarding the specific relationship with the gastrocnemius.