Ronald B. Coleman, Jr.
Present the concept of muscular flexion and decreasing arm angles by presenting students with pictures of the bicep, forearm, and wrist at various points through the curling motion. Have students measure the angle created by the bicep and forearm in each picture. Students will need a pencil and protractor in order to accurately measure the different angles. Students should be able to measure the angle and label it as straight, obtuse, right, or acute. Finally, students will gain exposure to the fixed point in a pulley system. The fulcrum is the scientific term for the point, or joint, around which bones move.