Rugby Drop Kick BreakdownBy Daniel Goodfellow

Agonist-Antagonist Relationship

Agonist: The agonist is the muscle that contracts in the movement, it also initiates or starts the movement.

Antagonist:The antagonist is the muscle that relaxes in the movement, this also controls the speed of the movement.

Preparation PhaseHere in my ankle joint a I am using plantarflexion. The ankle joint is a synovial hinge joint. The agonist, which is the muscle that contracts and initiates the movement, is the gastrocnemius and the soleus. The antagonist, which is the muscle that relax’s and controls the movement, is the tibialis anterior. The bones involved are, the tibia and fibula, which are in the lower leg, and the tarsals/metatarsals, which are in the foot.

Preparation PhaseIn my knee joint I am using flexion. The knee joint is a hinge joint. The agonist or contracting muscles, are the vastus medialis, vastus lateralis and rectus femoris, they are initiating the movement. The antagonist is my quadricep which is controlling the movement. The bones involved are the tibia and fibula, the fibula is the shin bone and they are both on the lower leg, and the femur, which is the thigh bone.

Preparation PhaseIn my hip joint I am using extension. The hip joint is a ball and socket joint. The agonist and initiator/contractor muscle is the gluteus maximus. The antagonist is the sartorius, this muscle is controlling the speed of the movement. The bones involved in this movement are the pelvis, which is the bone that extends the width of the hips and the femur, which is you thigh bone.

Execution PhaseHere in my ankle I am using dorsiflexion. The ankle joint is a synovial hinge joint. The agonist, the contracting and initiation muscle is the tibialis anterior. The antagonist, the relaxing and controlling muscles are the soleus and the gastrocnemius. The bones involved are the tibia and fibula, which are in the leg, and the tarsals and metatarsals, which are located in the feet.

Execution PhaseIn my knee I am using extension. The knee joint is a hinge joint. The agonist or contracting and initiator muscle is the quadricep. The antagonist or relaxing and controller muscles are the vastus medialis, the vastus lateralis and the rectus femoris. The bones involved in the movement are the tibia and fibula, which are located in the lower leg, and the femur, which is the thigh bone.

Execution PhaseIn my hip I am using flection. The hip consists of a ball and socket joint. The agonist or initiating and contracting muscle is the Sartorius. The antagonist or controlling and relaxing muscles are the gluteus maximus, gluteus medius and the gluteus minimus. The bones involved in the movement are the femur, which is in the upper leg (your thigh), and the pelvis which is the bone that extends the width of your hips.