ACSM 030-444 Exam - Topic 2 Question 17 Discussion

Actual exam question for ACSM's 030-444 exam

Question #: 17
Topic #: 2

[All 030-444 Questions]

The prime movers for extension of the knee are the

ABiceps femoris.

BBiceps brachii.

CQuadriceps femoris.

DGastrocnemius.

Show Suggested Answer

Suggested Answer: C

by Vinnie at Nov 24, 2025, 12:02 PM

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Ty

9 hours ago

Totally agree, it's all about the quads!

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Matthew

6 days ago

I thought it was the Gastrocnemius?

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Lauran

11 days ago

It's definitely the Quadriceps femoris!

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Elmira

16 days ago

Haha, B) Biceps brachii? Really? That's like saying your arms extend your knees. Good one!

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Kenneth

21 days ago

The quadriceps are the prime movers for knee extension, no doubt about it.

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Jose

26 days ago

Definitely C. Quad squad for the win!

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Valentin

1 month ago

C) Quadriceps femoris. Easy peasy!

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Edelmira

1 month ago

Definitely going with quadriceps femoris for this one. I recall it being the prime mover in knee extension from my notes.

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Elbert

1 month ago

I feel like the gastrocnemius might play a role too, but it’s mainly for plantarflexion, isn’t it?

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Gilberto

2 months ago

I remember practicing a question like this, and I think the biceps femoris is more about flexion, right?

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Melinda

2 months ago

I'm feeling a bit lost on this anatomy question. I'll need to review my notes on the muscles of the lower limb before moving on.

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Kiera

2 months ago

Okay, let me review what I know about knee extension. The quadriceps are the prime movers, so I'm going to go with C on this one.

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Chan

2 months ago

I think the quadriceps femoris is the main muscle for knee extension, but I’m not entirely sure.

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Daron

2 months ago

I'm a bit unsure on this one. I know the quadriceps are involved in knee extension, but I'm not sure if the other options might also play a role.

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Aliza

3 months ago

C) Quadriceps femoris. Gotta love those quads!

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Berry

3 months ago

I'd say C, but I'm still trying to figure out how the gastrocnemius fits into all this. Knee and ankle, you know?

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Alva

3 months ago

The quadriceps femoris is the main muscle group that extends the knee, so I'm pretty confident C is the right answer.

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Jani

3 months ago

Hmm, I think this is asking about the muscles that extend the knee. I'll need to think through the options carefully.

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Beatriz

2 months ago

I believe it's the Quadriceps femoris.

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