Factors Affecting Running Mechanics Flashcards
(12 cards)
Age
Old runners have decreased
speed
shorter steps
float time
CoM vertical displacement
PF ankle torque and power
Age
Old runners have increased
step rate
greater vertical GRF impact peaks
knee adduction torque (females)
Gender
Females have:
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
Speed
As running increases
stride length and frequency increase
Stride length increase more evident in
distance running (2-5m/sec)
Stride frequency more evident in
sprinting (7-9m/sec)
decreased foot contact time=
increase in muscle stiffness through LE
Slow to medium speed
gastroc
soleus
Sprinting
more iliopsoas, GM, and hams
Surface incline
Downhill
increase vertical GRF
increase risk of injury
increase braking impulse
decrease propulsion impulse
opposite for uphill
Surface Stiffness
Compliant surface
decrease GRF
Surface Stiffness
Stiff surface
greater knee flexion at IC
Midfoot/forefoot strike