Article

This study compared the running gait of mature and young females, and
investigated the effect of a motion control shoe.
First, it was hypothesised that
in a neutral shoe, mature females would display significantly greater rearfoot
eversion, knee internal rotation and external adductor moments when compared to a
younger group. Secondly, the motion control shoe would reduce rearfoot eversion
and knee internal rotation in both groups. Thirdly it was hypothesised that the
motion control shoe would increase knee external adductor moment, through an
increase in knee varus and moment arm. METHODS: 15 mature (40-60 years) and 15
young (18-25 years) females performed 10 running trials at 3.5ms(-1)+/-5% over a
force platform. Two shoes were tested, the Adidas Supernova Glide (neutral), and
the Adidas Supernova Sequence (motion control). Ankle and knee joint dynamics
were analysed for the right leg, and the mean of ten trials was calculated. Joint
moments were calculated using inverse dynamics. FINDINGS: In the neutral
condition, mature females presented greater peak rearfoot eversion, knee internal
rotation, and external adductor moments than young females (p<0.05). A motion
control shoe significantly reduced peak rearfoot eversion and knee internal
rotation among both groups (p<0.05). No between shoe differences in knee external
adductor moment were observed. INTERPRETATION:
A motion control shoe is
recommended to reduce risk of injury associated with rearfoot eversion and knee
internal rotation in mature females. However since the knee external adductor
moment is a variable commonly associated with medial knee loading it is suggested
that alternative design features are required to influence this moment.
CI - Copyright (c) 2012 Elsevier B.V. All rights reserved.

Langue : ANGLAIS