[Purpose] The purpose of this study was to determine the effects of wearing high heels
while driving on lower extremity muscle activation. [Subjects] The subjects of this
experimental study were 14 healthy women in their 20s who normally wear shoes with high
heels. [Methods] The subjects were asked to place their shoes on an accelerator pedal with
the heel touching the floor and then asked to press the pedal with as much pressure as
possible for 3 seconds before removing their feet from the pedal. A total of 3
measurements were taken for each heel height (flat, 5 cm, 7 cm), and the heel height was
randomly selected. [Results] The levels of muscle activity, indicated as the percentage of
reference voluntary contraction, for gastrocnemius muscle in the flat, 5 cm, and 7 cm
shoes were 180.8±61.8%, 285.4±122.3%, and 366.2±193.7%, respectively, and there were
significant differences between groups. Those for the soleus muscle were 477.3±209.2%,
718.8±380.5%, and 882.4±509.9%, and there were significant differences between groups.
[Conclusion] To summarize the results of this study, it was found that female drivers
require greater lower extremity muscle activation when wearing high heels than when
wearing low heels. Furthermore, instability and muscle fatigue of the ankle joint, which
results from wearing high heels on a daily basis, could also occur while driving.