Factors Affecting Running Mechanics Flashcards

(12 cards)

1
Q

Age
Old runners have decreased

A

speed
shorter steps
float time
CoM vertical displacement
PF ankle torque and power

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2
Q

Age
Old runners have increased

A

step rate
greater vertical GRF impact peaks
knee adduction torque (females)

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3
Q

Gender
Females have:

A

Greater frontal and horizontal plane motions + absorption
Greater hip IR, ADD
Greater knee ABD
2x more glute max activity
Greater glute med and vastus lateralis
Higher risk of pfj pain and ITB syndrome

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4
Q

Speed
As running increases

A

stride length and frequency increase

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5
Q

Stride length increase more evident in

A

distance running (2-5m/sec)

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6
Q

Stride frequency more evident in

A

sprinting (7-9m/sec)

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7
Q

decreased foot contact time=

A

increase in muscle stiffness through LE

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8
Q

Slow to medium speed

A

gastroc
soleus

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9
Q

Sprinting

A

more iliopsoas, GM, and hams

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10
Q

Surface incline
Downhill

A

increase vertical GRF
increase risk of injury
increase braking impulse
decrease propulsion impulse
opposite for uphill

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11
Q

Surface Stiffness
Compliant surface

A

decrease GRF

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12
Q

Surface Stiffness
Stiff surface

A

greater knee flexion at IC
Midfoot/forefoot strike

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