Running Gait Flashcards
compared to normal walking, what observations do we see with running?
- increased stride length
- narrow BOS
- trunk rotation
- opposition
when does initial running occur?q
6-7 months after walking is initiated
what observations occur with older adult running?
- decreased stride length / ROM
- decreased speed
- decreased inflammation (??)
what is the gait cycle time for running?
stance 30%, swing 70%
how many times does the foot hit the ground in a minute during running?
50-70x
what is the impact force during running?
3.5x body weight
how many % of runners are heel strikers?
80%
how many % of runners are forefoot strikers?
20%
where is there peak impact forces in heel strikers?
calcaneus/heel and big toe
where is there peak impact forces in forefoot strikers?
ball of foot
what critical events are occuring at IC for running?
- shock absorption
- muscular stabilization
- dorsiflexion of ankle
- rapid flexion of knee
- rapid hip extension
- adduction of hip
- narrow BOS
how long is the foot on the ground during running?
0.08-0.09 seconds w/ forces up to 3.5x BW
what critical events are occuring at MSt for running?
- swing limb passes stance
- COM in front of stance foot
- COM at lowest point
- knee moving into extension
- rapid plantarflexion (recoil)
- prep for flight
what is occuring during early MSt for running?
majority of muscles still active to accept body weight from IC
what is occuring during late MSt for running?
when COG moves anterior to knee
BFSH controlling knee ext
Iliacus preparing for swing
what provides a stable platform for the BW to pass over in MSt for running?
foot and leg // all BW is borne by a single leg and the lower limb is usually more susceptible to injury
In MSt for running, what is the foot doing (or stopping)?
pronating // if foot is still pronating then there’s too much movement and instability
how does the weight of the body affect the foot in MSt for running?
BW has a flattening effect on the arch of the foot
where is the force dissipated over time in running (IC/MSt)?
- achilles tendon
- plantar fascia
- quad mechanism
- hip ABductors
what is the Windlass Mechanism?
as grt toe extends - plantar fascia tightens and raises arch of foot
what critical events are occuring at Take Off for running?
- majority of forward propulsion of body coming from swing leg and arms
- max hip extension
- passive knee extension
- rapid tibial advancement over foot
- foot provides rigid lever
- opposite leg in maximum lift
what critical events are occuring at initial swing for running?
- COM displaced upward and forward
- rapid active hip flexion
- hip adduction maintains line of progression
- rapid knee flexion
- active ankle DF
what critical events are occuring at MSw for running?
- COM reaches highest point
- active hip flexion peaks
- hip adduction continues
what critical events are occuring at TSw?
- COM is displaced downward
- active hip extension
- hip adductors prepare for foot placement
- knee rapidly extends
- progressive dorsiflexion
