Apersonal trainer observes a client's knees moving inward while performing the overhead squat assessment. which of the following muscles are probably underactive?
a. gluteus medius and gluteus maximus
b. adductor complex and vastus lateralis
c. lateral gastrocnemius and soleus incorrect
d. biceps femoris (short head) and tensor fascia latae (tfl)

Option C

Explanation:

Gastrocnemius and soleus muscles are jointly known as calf. Gastrocnemius is the larger muscle and connects to the knee joint while soleus is smaller muscle that connects to the portion of leg just below the knee. When gastrocnemius is stretched, the knee remains straight while when the soleus is stretched the knee bends. If a person feels difficulty in bending or stretching the knees, he/she must be facing the problem with the calf muscle. Hence, Option C is correct