Which of the following is an example of proper movement for a biceps curl?
Rotate the arm at the shoulder with the back straight
Bend the arm at the elbow with the back straight
Rotate the elbow and arch the back
Bend the elbow and move the upper arm forward
Rotate the arm at the shoulder with the back straight
Bend the arm at the elbow with the back straight
Rotate the elbow and arch the back
Bend the elbow and move the upper arm forward