The pectoralis major I believe
Gastrocnemius and Soleus with leg straight, to isolate gastrocnemius bend knee.
the hamstring is used for flexing the knee
The primary muscles used in the lateral raise exercise are the deltoid muscles, specifically the lateral deltoid.
Quadricep
The muscles used for knee internal rotation include the popliteus, semitendinosus, semimembranosus, gracilis, sartorius, and semitendinosus muscles. These muscles work together to rotate the knee inwards.
I came to this website to know the answers of my questions not answering the question
Gastrocnemius
upper back
it works your abs
False. The quadriceps muscle is primarily responsible for extending the knee, not flexing it. The muscles that flex the knee are mainly the hamstrings.
The muscles used in the leg press exercise are your Quads primarily. Hamstring gets a good work out too.
The antagonists would be those muscles that cause knee flexion. Hamstrings (biceps femoris, semimembranosus, semitendonosis) are the primary knee flexors, and would thus be antagonists to knee extension.