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010-111 · Question #285

Which exercise works best in isolating the soleus muscle?

The correct answer is C. Seated heel raises with flexed knees. Seated heel raises with flexed knees best isolate the soleus because knee flexion puts the gastrocnemius at a mechanical disadvantage, forcing the soleus to do the work. The other options allow the gastrocnemius to contribute significantly.

Exercise Program Development and Implementation

Question

Which exercise works best in isolating the soleus muscle?

Options

  • AStanding heel raises.
  • BSeated ankle extensions with the knees straight.
  • CSeated heel raises with flexed knees.
  • DHalf squats with external rotation of the hip joint.

How the community answered

(22 responses)
  • A
    5% (1)
  • B
    9% (2)
  • C
    82% (18)
  • D
    5% (1)

Why each option

Seated heel raises with flexed knees best isolate the soleus because knee flexion puts the gastrocnemius at a mechanical disadvantage, forcing the soleus to do the work. The other options allow the gastrocnemius to contribute significantly.

AStanding heel raises.

Standing heel raises keep the knee extended, allowing the gastrocnemius to remain at an optimal length-tension position and contribute substantially alongside the soleus.

BSeated ankle extensions with the knees straight.

Seated ankle extensions with knees straight do not place the gastrocnemius in a shortened position, so it continues to assist with plantar flexion rather than being isolated out.

CSeated heel raises with flexed knees.Correct

The gastrocnemius is a two-joint muscle that crosses both the knee and ankle, while the soleus crosses only the ankle. When the knee is flexed during a seated heel raise, the gastrocnemius is shortened and cannot generate effective force, removing it from the movement. This shifts the load almost entirely to the soleus, making flexed-knee seated heel raises the preferred isolation exercise for that muscle.

DHalf squats with external rotation of the hip joint.

Half squats with external hip rotation target the quadriceps and gluteal muscles and do not specifically load the plantar flexors or isolate the soleus.

Concept tested: Soleus isolation using knee flexion position

Source: https://www.nsca.com/education/articles/kinetic-select/gastrocnemius-and-soleus/

Topics

#soleus muscle#calf exercises#muscle isolation#seated heel raises

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