Kinetic Link Flashcards
What does the kinetic link system consist of?
- coordination: the body segments are linked together, well-timed movements through muscle contractions
What are the 2 basic principles that guide the kinetic link system?
- simultaneous movements of the body segments
- sequential movements of the body segments
What are simultaneous movement of the body segments used for?
accuracy or force
What are sequential movements of the body segments used for?
high velocity
Describe the simultaneous kinetic link principle. Give an example.
- major body motions simultaneous
- no observable time exists between the contributions of each involved segment
- ex. shot-put
The simultaneous motion results in:
- less velocity/power
- decreased risk of injury
Name some skills that use both simultaneous and segmental movements.
- tennis serve
- volleyball hit
Describe the sequential kinetic link principle. Give an example.
- specific sequence
- segmental motions or joint rotations
- time elapses between peak velocities
- core —> appendages
- ex. pitching: lower body, trunk, arm, hand, fingers (max. velocity)
Sequential vs. simultaneous kinetic link principle depends on:
- mass of object
- high velocity vs. accuracy
What is the principle of specific velocity?
most sport actions involve the optimization of velocities of a specific body segment, sport implement, or sport object
What is the continuity principle?
- optimum transfer of force
- in the human body: large to small muscle groups
- initiation/engagement of the most stable/core muscle groups first
- more outward/upward to limbs (proximal –> distal)
What is the principle of sequential velocity?
Optimum specific velocity is achieved by:
- proper timing
- velocity of each component reaches its greatest contribution in sequence up to the final critical point
What is the principle of summation of velocities/sequential timing?
development of maximum force:
- maximize the number of body parts, joints, and planes involved
- develop maximum velocity in each body segment
- coordinate these velocities to maximize the resultant force or velocity (aka sequential timing)
What is the principle of energy transformations?
the stereotype of perfect skill mechanics is usually one in which energy transformations are carried out most smoothly and efficiently
What is the direction principle?
all force should be applied as directly as possible in line with the intended direction of motion
What is the principle of duration of force application?
if a constant force is applied to a body, the body develops greater velocity as the distance over which the force is applied increases
What are the 3 steps in motor performance analysis?
- skill phasing
- principles/factors application
- coaching/feedback phase
What does the skill phasing step consist of?
- generally 6 phases
- describing the skill into its logical parts
- stereotype of perfect skill mechanics
What does the principles/factors application step consist of?
- describing the principles/factors that lead to effective, efficient performance
- know the purpose of the skill
- know the product and the process
- know the key factors and underlying principles
What does the coaching/feedback phase consist of?
- viewing from multiple angles
- be specific
- identifying underlying mechanical problems
- provide feedback
