Speed, Change Of Direction, Agility, And Running Flashcards
(26 cards)
Speed
Skills and ability needed to achieve high velocity
Change of direction
Skills and abilities needed to explosively change movement direction, velocities, or modes
Agility
Ability to change direction, velocity, or mode in response to a stimulus
Rate of force production
Development of maximal force in minimal time
Impulse
Product of generated force and the time required for production
What is the mathematical model that depicts the muscles in terms of springs which go through shortening and lengthening depending upon stages of running
Spring-mass model
Running speed is usually a function of what
Stride length and stride frequency
What are the two sub tasks of linear sprinting
Start and acceleration and maximum velocity
What are the two phases characterized by both acceleration and maximum velocity
Flight phase and support phase
Elite sprinter start angles
Front lower leg at 90 degrees, rear lower leg angle is around 133 degrees
Early flight action
Eccentric; hip flexion and knee extension
Early flight purpose
Decelerates backward rotation; of thigh and of leg/foot
Mid flight action
Concentric; hip flexion Moving from eccentric knee extension to eccentric knee flexion
Mid flight purpose
Accelerates thigh forward
Late flight action
Concentric; hip extension eccentric; knee flexion
Late flight purpose
Rotates thigh backward for foot contact and accelerates leg backward
Early support action
Continued concentric hip extension; brief concentric knee flex then eccentric hip ext, and then eccentric PF
Early support purpose
Minimizes braking effect of foot strike, absorbs landing shock, helps absorb shock
Late support action
Eccentric hip flexion, concentric knee extension, concentric PF
Late support purpose
Decelerates backward thigh rotation, propels center of gravity forward, aids in propulsion
Factors to improve change of direction
Low center of mass, increased hip extension velocity, increased impulse in breaking and propulsion, increased knee flexion entering braking phase, minimize trunk angular displacement during deceleration, and increase lateral trunk tilt during 190degree turns
Factors of perceptual cognitive ability
Visual scanning, anticipation, pattern recognition, knowledge of situation, decision making and accuracy, and reaction time
Main training goals of agility
Enhanced perceptual cognitive ability in various scenarios, rapid braking, rapid acceleration towards new direction
Strength training requirements for agility
Dynamic strength, concentric explosive strength, eccentric strength, reactive strength, multidirectional strength, perceptual-cognitive abilities
