Extension at the knee involves ________.
A) concentric contraction of the hamstring group and eccentric contraction of the quadriceps femoris group
B) eccentric contraction of the hamstring group and concentric contraction of the quadriceps femoris group
C) isometric contraction of the hamstring group and isotonic contraction of the quadriceps femoris group
D) isotonic contraction of both the hamstring group and the quadriceps femoris group

Question

Quizplus · Accepted Answer

Extension at the knee involves the concentric contraction of the quadriceps femoris group and the eccentric contraction of the hamstring group. This is because the quadriceps femoris group is responsible for extending the knee, while the hamstring group opposes this action to control and slow down the movement. Therefore, during knee extension, the quadriceps femoris group contracts concentrically to lift the load, and the hamstring group contracts eccentrically to control the movement.

Extension at the Knee Involves ________