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In a 2012 study, researchers examined the risk long time high heel wearers would have in regards to calf Muscle fascicle length and strain. The control group consisted of women who wore heels for less than ten hours weekly and the experimental group consisted of women who wore heels for a minimum of forty hours weekly for at least two years. The experimental group was told to walk down a walkway barefoot and in heels while the control group walked down barefoot as cameras recorded their movements to calculate muscle fascicle lengths. The data showed that wearing heels shortened the length of the medial gastrocnemius (MG) muscle fascicles in the calf significantly as well as increasing stiffness in the Achilles Tendon. The experimental group also demonstrated a larger amount of strain on the muscle fascicles while walking in heels because of the flexed position the foot is forced into. The researchers were able to estimate that when wearing heels, the estimated fascicle strains were approximately three times higher and the fascicle strain rate was approximately six times higher. Additionally, they were able to conclude that the long term usage of high heels can increase the risk of injuries such as strain along with discomfort and muscle fatigue.
In a 2016 study from the Sahmyook University in Korea, researchers wanted to investigate the effects of high heels on the activation of muscles in the cervical and lumbar portions of the spine which refers to the neck and lower back. Thirteen women were recruited to walk down a walkway in three different testing conditions: barefoot, in 4 cm heels and in 10 cm heels. Surface electrodes were placed on the muscle mass of the women’s spines as well as their feet to measure the electrical activity of muscles at different points of movement. The results of the study indicated an increase in both cervical and lumbar muscle activation as heel height increased. The cervical spine, the neck, assists in maintaining head stability and postural control in the body. The usage of high heels shifts the body’s center of mass which forces the spine to adjust itself in order to maintain balance. The researchers mentioned that over time these results would increase local muscle fatigue that could lead to muscle swelling, decreased muscle movement and even tissue deformation.
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