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Q & Q Analysis in Kicking (Kinectic Chain Theory (The better kickers…
Q & Q Analysis in Kicking
Objective
generate maximum distal-end speeds (foot) at impact
Classification of kicking
Single planar
Multi Planar
Kicking Phases
Approach Stance foot placed beside the ball
force-production Transfer of body weight from stance leg to kicking leg
Impact Kicking leg
Maximum extension at the knee joint
Full plantar flexion at the ankle joint
Follow-Through
Continued trunk and pelvic rotation
Qualitative Analysis
Exhibit the sequential movement of the thigh, shank and foot segments to impact.
A series of sequential activated body segments as the kicking limb swings like a pendulum.
Quantitative Analysis
Projectile motion( depending on type of kicking)
Release angle
Release speed
Height of release
Angular Velocity
Proximal-to-distal pattern of segmental angular velocities in Kicking
Segments' velocity
• Ball speeds correlated to foot
speeds at impact
• Proximal-to-distal technique
Kinectic Chain Theory
The better kickers are generally recognized by a proximal-to-distal sequence of segmental activity.
• The open kinetic chain: system of links with a fixed base (trunk) and open end (segments that are free to rotate).
• The velocity of distal segments is a result of more than the joint moments (torque)
Transferring of momentum and kinetic energy in a proximal-to-distal manner is important in kicking.
Momentum generated in the proximal segments through the generation of large muscle forces is transferred to the distal segments.
Stretch Shortening Cycle
• The better kickers usually swing the kicking limb as far back as possible before swinging towards the ball
• Generates greater ROM, therefore generates greater swinging momentum to impact
• The better kickers usually swing the kicking limb towards the ball immediately after the pull-back
• Generates faster forward swing of the kicking limb to impact
Increasing the activation state of the muscles by pre- stretching the connective tissues (including the muscles)
As you bring your legs (thigh and shank) back, you prepare the knee extensor-muscles (eccentric contractions) and immediately flex and rotate the joints to create the
enhanced motion