NO I am insulted
the hamstring is used for flexing the knee
yes it helps
The cast of Flexing Muscles - 2012 includes: Charles Fairbanks Serpiente Negro as Serpiente Negro
flexing muscles
Bending moving straightning flexing
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
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.
Muscles within the brachium are responsible for the extension of the elbow. These muscles also work for the flexing of the arm as well.
Biceps. Brachhil
No, you should not be able to move your kneecaps around by flexing the muscles in your thigh. The kneecap is a small bone that is designed to move in a specific groove in the knee joint when the leg is bent or straightened. Trying to move the kneecap by flexing the thigh muscles can cause strain on the knee joint.
The muscles responsible for flexing and extending your lower leg are the quadriceps and hamstrings, while the muscles responsible for flexing and extending your upper arms are the biceps and triceps, respectively. These muscle groups work in opposition to each other to facilitate these movements.