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The Biceps flex the elbow The Triceps extend the elbow
flex the elbow
exstend
triceps brachii
It's easier to flex the right elbow when your forearm is supinated because the palm is turned upward.
It help you move you arm to let it flex!
triceps brachii
brechioradialis
The bicep flexes the arm at the elbow.
The elbow is a hinge type joint, so it will flex and extend with minimal rotation.
When you straighten your arm or leg (as in a pushing movement), you EXTEND the arm or leg. When you bend your arm at the elbow or your leg at the knee, you FLEX the arm at the elbow and flex the leg at the knee.
Cubital fossa