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The Biomechanical Analysis of A Soccer Kick

1. Describe the joint movements using anatomical terminology of kicking a soccer ball.

2. Describe the kinematic analysis of movement. This should include displacements and velocities. Graphs with brief explanations are acceptable. Indicate whether the angular displacements are close to the maximal ranges of joint motion.

3. Explain the muscle activation patterns involved in production/control of movement. Graphs of EMG vs time are acceptable, with explanations of functions of each muscle.

4. Provide kinetic analysis of movement. Include an analysis of joint moments. Graphs of joint movements vs time, with explanations, are acceptable.

5. Interpret the relationships between muscle activity and joint moments in this activity.

Solution Preview

Please see the attached file.

1. During the actual kicking phase the quadriceps muscle group consisting of the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius will flex to extend the led at the knee hoint for kicking and standing. The rectus femoris pulls the leg up at the hip and will be primarily responsible for the kicking and lifting of the knee. These muscels are attached lateral to the pelvis below the iliac crest at the tope two thirds of the femur and distal to the patella and upper tibia.
Muslce of the lower leg especially the calve region for pointing the toes. The gastrocnemius, proximally attached to posterior of the lower femur and distally posterior of the heel via Achilles tendon will allow much of the running and lifting of the heel for one leg while steadying helping to steady the standing leg. The soleus, proximally attached to posterior of upper fibula/tibia and distally attached to heal via Achilles deeper to the bone than the gastrocnemius will point the toes and lift the heels. The plantaris, proximally attached to the posterior lower lateral femur and distally to heal via Achilles, will somewhat assist in pointing toes and flexing knees. The popliteus, proximally attached to lower lateral femur and distally to the posterior superior tibia will unlock and flex the knee. The flexor hallucis longus, proximally attached to the posterior fubula and distal to the underside of primary toe digit (big toe), it will flex the digit and support the arch of the foot. The flexor digitorum longus, proximally attached to the posterior tibia/fibula and distally to the four secondary toe digits, also support the arch of the foot and fflex the four small toes. The tibialis posterior, proximally attached to posterior tibia/fibula and distally to the underside of the foot, will invert the foot for an inside step kick tipping the pinky toe down and the big toe up. It may be pertinent to note that the central nervous system will control the motor units through the cerebellar processes in a learned manner for experienced kickers much like one walks without thinking. ...

Solution Summary

The describes the joint movements of kicking a soccer ball. It gives an overview of the muscle activation patterns.

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