kinetics frontal

Question 1

initial contact

Answer 1

GRF lateral (in preparation for eversion in the next phase

Question 2

loading response

Answer 2

subtalar /rearfoot - GRF lateral causing eversion tibialis anterior and posterior eccentrically contracts
patella - internal rotation of the leg controlled by tensor fascia latae and gluetus maximus
pelvis - hip adduction (due to the transfer of weight to the stance limb) controlled by eccentric contractions of gluteus medius

Question 3

midstance

Answer 3

subtalar /rearfoot - GFR lateral eversion when tibialis posterior eccentrically contracts (early) GFR medial and slight inversion as tibialis posterior isometrically contracts.
pelvis - hip abduction; gluteus medius concentrically contracts

Question 4

terminal swing

Answer 4

subtalar /rearfoot - GFR medial causing inversion as tibialis posterior eccentrically contracts.
pelvis - abduction controlled by tensor fascia latae

Question 5

pre swing

Answer 5

subtalar /rearfoot - GFR close to subtalar joint but inversion due to the tibialis posterior concentrically contracting
pelvis - adductor longus and gracillis eccentrically contract to control hip abduction