the hamstring is used for flexing the knee
hamstring group is the primary muscle group for flexing the knee
Bending moving straightning flexing
When flexing your arm you would use shoulder muscles, mainly the deltoids and pectoralis major. If you flex your elbow (which most people think means flexing your arm, but is really the forearm), then you would use your biceps, brachialis. and brachioradialis muscles, which would be three muscles, depending on the orientation of the forearm.
yes it helps
The cast of Flexing Muscles - 2012 includes: Charles Fairbanks Serpiente Negro as Serpiente Negro
Quadricep
flexing muscles
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
The pectoralis major I believe
no. flexing is deceasing the angle (e.g bending knee) extending is straightening something. (e.g. straightening knee)
The semitendinosus and the semimembranosus muscles assist the biceps femoris in the action of flexing the knee joint. The semitendinosus and the semimembranosusmuscles also work together to perform extension of the hip joint.
Muscles within the brachium are responsible for the extension of the elbow. These muscles also work for the flexing of the arm as well.