Throwlike and Pushlike Movement Patterns (source: Kreighbaum 1996 ed, pp 335-355) - PowerPoint PPT Presentation
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Throwlike and Pushlike Movement Patterns (source: Kreighbaum 1996 ed, pp 335-355)
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Throwlike and Pushlike Movement Patterns (source: Kreighbaum 1996 ed, ... ex : javelin, discus, shotput. projection of objects for accuracy with speed a factor ... – PowerPoint PPT presentation
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Title: Throwlike and Pushlike Movement Patterns (source: Kreighbaum 1996 ed, pp 335-355)
1
Throwlike and Pushlike Movement Patterns (source
Kreighbaum 1996 ed, pp 335-355)
- Usual objectives of throw and push patterns
- projection of objects for greatest horiz or vert
dist - ex javelin, discus, shotput
- projection of objects for accuracy with speed a
factor - ex volleyball, tennis, racquetball, baseball
pitch - Movement pattern terminology review
- Throwing patterns are further defined as
underarm, sidearm, or overarm (See Table on
slide 2) - Skills listed under each pattern differ because
of constraints - ex rules governing implement or ball, rules
governing target. - Open and Closed chain movements
- Open kinetic chain - sequential segmental
action, end segment is free to move (e.g.,
baseball pitch) - Closed kinetic chain - simultaneous end segment
movement, end segment meets with considerable
resistance (e.g., shot put)
2
Common movement patterns (Table J.1, p 336)
3
Understanding questions on segmental movement
concepts and terminology
- List three general movement patterns and one
sport skill under each pattern. - How does one distinguish between a movement
pattern and a spot skill? - List one sport skill using an overarm, an
underarm, and a sidearm parttern. - List two open kinetic chain activities.
- List two closed kinetic chain activities.
- What is the difference between an open skill and
an open kinetic chain activity? - What is the difference between a closed skill and
a closed kinetic chain activity?
4
Throw-like patterns
- Characteristics of throw-like patterns
- can be a strike or a kick
- high end-point velocity is critical
- sequential segmental action, object lags behind
elbow and/or shoulder - Open kinetic link model see slides 6 7
- Linear motion of a point on a rotating segment
V r? - Sequencing segmental rotations - kinetic link
principle - system has a base and a free open end
- segmental masses progressively decrease
- an external torque is applied at the base to
initiate the movement - segmental rotational acceleration is timed
sequentially - A model of an open kinetic link system See
slide 9 - Throwlike movements performed while in the air
See slide 10
5
Understanding questions on sequential segmental
rotations
- Which of the following activities does the open
kinetic link principle applies soccer punt,
golf swing, jab in boxing, back handspring
takeoff, hammering a nail, hammer throw, football
pass, bowling. - State three principles that relate to the use of
body segments in generating velocity on the open
end of the open kinetic chain. - How does the radius of gyration relate to
throwing an object or swinging an implement? - Describe the differences in the radius of
gyration and the radius of rotation in relation
to throwlike movements. Relate those to linear
and angular velocity.
6
Three-segment kinetic link model
7
Three-segment model (Fig j.2, p 339)
8
Whip-like action of segmental system
9
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10
Three-segment model when airborne
11
Throwing motion (sequential)
12
Segmental sequence when throwing
13
Pushlike Movements
- Pushlike patterns - Simultaneous segmental
actions - Objective is accuracy, or large motive force
- Distal segments move simultaneously, resulting in
rectilinear movement of distal segment - Four differences in throw and push (p 350). In
throws - distal segment lags back, segments move
sequentially, object moves curvilinearly,
wheel-axle movements (shoulder and hip rotation)
involved - Movements lie on a throw-push continuum, the
location depending on constraints of performer
and object - performer strength and skill
- object mass, size, and shape
14
Understanding questions on pushlike and throwlike
patterns
- What four factors distinguish a pushlike pattern
from a throwlike pattern? - List five constraints of the activity, equipment,
or performers that would have the effect of
putting a pushlike element into an otherwise
ideal throwlike pattern. - List three skills that are not throws per se but
that use the upper extremity in a throwlike
pattern. - List three skills that use the upper or lower
extremity in a pushlike pattern.
15
Pushing Motions
16
Development of throwing motion
Step with opposite leg
Push with arm
shoulder rotation
Step with leg on same side
