Differences and mechanisms
"Girls and young adults typically wear a variety of athletic
footwear when running. On the basis of previously published
criteria, athletic shoes are usually classified as ‘stability’ or
‘neutral’ shoes."
an increased perpendicular distance (mm) from
the knee joint centre (KJC) to GRF vector (i.e.,
the knee-GRF lever arm), resulting in higher
peak KFM; however, this notion is yet to be
confirmed. Likewise, the sagittal plane resultant
GRF magnitude may also be influenced by
footwear [24] , and thus may be another potential
contributor to alterations in the peak KFM.
Hence, lower limb kinematics, the knee-GRF
lever arm and sagittal plane resultant GRF
magnitude are likely relevant variables to
explore as potential mechanisms underpinning
changes in peak KFM observed with footwear
during running.
The primary aim of this study was to examine
differences in running-related peak KFM
between barefoot, stability and neutral footwear
in adolescent girls and young women spanning
early to post-puberty. A secondary aim was
to determine whether the knee-GRF lever
arm, sagittal plane resultant GRF magnitude
and sagittal-plane kinematics (i.e., hip flexion
angle, knee flexion angle, ankle dorsiflexion
angle all at time of peak KFM, knee flexion
excursion and knee flexion angle at initial
contact) were associated with the change in
peak KFM between footwear conditions. The
primary hypothesis was that both the stability
Current Pedorthics | March/April 2019
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