Sprinting/Linear speed Flashcards
What is linear speed?
Linear speed is essentially getting from a-b as fast as possible
What are the two main components to linear speed?
- Acceleration
- Maximal speed/velocity
What are the two references for understanding and analysing movement?
- Kinematics
- Kinetics
What is kinematics? (4)
Coachable
- Describes the motion of the the objects without considering the cause
- Angular position, velocity and acceleration
- Centre of mass
- Base of support
What is Kinetics ? (7)
Trainable
- Describes the motion of the objects considering the cause of motion
- Ground reaction force
- Power
- RFD
- Impulse
- Moments/torque
- Stiffness
What are the phases of sprinting? (4)
- Acceleration
- Transition
- Top speed/max velocity
- Speed maintenance
What are the forces involved in sprinting ? (2)
- Vertical force, gravity, primary force
- Horizontal force, air resistance
Acceleration produces force to …….. velocity
generate
Maximal speed produces force to …….. velocity
handle
What is acceleration?
Rate of change of velocity in respect to time
What is impulse?
Ability to produce large amounts of force in short periods
What is the impulse in acceleration?
Large horizontal and enough vertical component to not fall over
What is the progression of impulse through running phases?
Large Horizontal impulse with enough vertical to not fall to begin, as speed picks up torso becomes more upright and vertical impulse force increases rapidly to maintain torso position
What are two main characteristics sprinters can improve to become faster?
- Push more at the start of race (greater magnitude of force)
- Break less as race progresses (optimise technical execution, minimising horizontal braking)
What is the kinematic formula for maximal velocity?
Contact time (CT) Contact Length (CL) Velocity = distance over time Velocity = contact time/contact length
