throw, strike, & kick
Goals:
o Control or maximize velocity given to an object
o Look at how angular motion translates to velocity
o Control or maximize velocity given to an object
o Look at how angular motion translates to velocity
Biomechanical Factors:
o Angular Velocity
-Speed of rotation
-Radius o V= radius x angular velocity
o The amount of force you need depends on
-Mass; Increase in mass=increase in force
-Angular velocity/linear velocity
-Increase in velocity=increase in force
-Radius
-Increase in radius=increase in force
Usually there is not just 1 object rotating-
o Segments in the body rotate together
o All the segments can rotate separately but they need to rotate in a sequence
Velocity will build as more segments are sequenced:
· Summation of speed
· Kinetic chain/link
· Kinematic chain
o Rotate segments proximal to distal
-Key is to get momentum transferred to the next segment at the peak momentum of the previous segment
· -Conservation of energy down the object
Critical Features of Punting:
o Straight line approach
o Ball out in front
o Eyes on the ball
o Drop ball straight down
o Trunk angle during drop
-Upright/ lean back
o Drop timing
-Drop when opposite foot is planted
o Drop placement
o Hip extension, knee flexion to hip flexion, knee extension
o Toe down, ankle locked
-Drop ball when foot is fully plantarflexed and locked out
o Forceful plant, on heel
o Follow through (torso upright, hip flexed)
o Nose down and in
o Speed of kick and approach
o Kick in same plane
o Path of the ball:
-Parabola: 45 degree arch
-Spiral pattern: Hit ball slightly off center & laces ou
Observation Plan:
-frontal and sagittal view
-examine up the kinetic chain
o Angular Velocity
-Speed of rotation
-Radius o V= radius x angular velocity
o The amount of force you need depends on
-Mass; Increase in mass=increase in force
-Angular velocity/linear velocity
-Increase in velocity=increase in force
-Radius
-Increase in radius=increase in force
Usually there is not just 1 object rotating-
o Segments in the body rotate together
o All the segments can rotate separately but they need to rotate in a sequence
Velocity will build as more segments are sequenced:
· Summation of speed
· Kinetic chain/link
· Kinematic chain
o Rotate segments proximal to distal
-Key is to get momentum transferred to the next segment at the peak momentum of the previous segment
· -Conservation of energy down the object
Critical Features of Punting:
o Straight line approach
o Ball out in front
o Eyes on the ball
o Drop ball straight down
o Trunk angle during drop
-Upright/ lean back
o Drop timing
-Drop when opposite foot is planted
o Drop placement
o Hip extension, knee flexion to hip flexion, knee extension
o Toe down, ankle locked
-Drop ball when foot is fully plantarflexed and locked out
o Forceful plant, on heel
o Follow through (torso upright, hip flexed)
o Nose down and in
o Speed of kick and approach
o Kick in same plane
o Path of the ball:
-Parabola: 45 degree arch
-Spiral pattern: Hit ball slightly off center & laces ou
Observation Plan:
-frontal and sagittal view
-examine up the kinetic chain
punting_observation_check_list.docx | |
File Size: | 13 kb |
File Type: | docx |
Evaluation Plan:
- Correct wind up first
- Watch follow through
- Watch up the kinetic chain
- Incorporate strength and flexibility training to increase power output