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17 Cards in this Set
- Front
- Back
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What is a relative angle? Provide three examples. |
The angle between two segments 1. Knee joint |
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What is an absolute angle? Provide three examples. |
The angle of inclination of a body segment, describing the orientation of a segment in space 3. Forearm |
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Can sprint running have phases? If so what are they? |
Acceleration, max-velocity, deceleration |
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During running what are the movements of the legs known as? |
Step and strides |
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What is a step? |
Left to right foot ground contact |
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What is a stride? |
One foot ground contact to the same foot, left to right back to left (full cycle) |
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What are the subdivisions of a step? |
Swing phase and stance phase |
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What is the swing phase during sprinting? |
Once the foot leaves the ground and is brought forward in preperation for the next step |
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What is the stance phase during sprinting and explain what occurs as runningspeed increases. |
Where the person is in contact with the ground |
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What is the flight phase during sprinting and explain what occurs as runningspeed increases. |
When they have no contact with the ground, therefor they are a projectile. Flight phase period increases |
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What are the two main determinants of sprint velocity? |
Length and rate Speed velocity = (m.s-1) Step length (m) Step frequency (Steps per second) |
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What are the main components of step frequency? |
Number of steps per second Distance the COG travels Distance between two foot contact |
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What are the main components of step length? |
Length from the toe of foot 1 to the toe of foot 2 Stance Flight distance |
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What is “Negative Interaction”? |
When step frequency or step length impacts negatively on each other |
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What types of spikes occur in a vertical GRF trace during running? |
The impact and propulsion spikes |
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How can running speed be increased? |
Increase ground reaction force (GRF) |
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What are the components of the horizontal GRF? Explain these components. |
A negative (posterior) value and a positive (anterior) value Negative - braking phase Positive - Propulsion phase |
