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Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running
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Summary September 14th, 2017
This study investigated lower-limb kinematics and ground reaction force (GRF) during moderate high-heeled jogging and running. Subjects were divided into groups of experienced wearers and inexperienced wearers. A three-dimensional motion analysis system with a configured force platform captured lower-limb joint movements and GRF.
Transcript
The overall goal of this experiment is to observe the effects of high-heeled shoes on lower limb mechanics during moderate high-heeled jogging and running. This method can answer the key question that in high-heel exercise, interference, such as the elevation that the heel has, may not be the single main factor causing the attenuators of the low limb mechanics. The one feature of this protocol is that with the variety of participants as experienced and inexperienced subjects, which has been readily considered in previous high heeled studies using their guardist and their method.
Begin by measuring the subject's standing height and body mass. Measure the distance between the superior iliac spine and the ankle internal condyle, the distance between the medial and lateral knee condyles, and the distance between the medial and lateral ankle condyles using measuring calipers. Next, palpate to identify anatomical landmarks.
Label each landmark on the skin using a marking pen and then attach the 16 passive retro-reflective markers on the landmarks of both sides of the lower limbs with double-sided adhesive tape. Ask the subject to change into the experimental shoe. Then have them walk, jog, and run freely along the runway until they are physiologically and psychologically comfortable with the cameras and markers on their lower limbs, and they feel like they are moving naturally.
Next, ask the subject to practice jogging along the runway at a comfortable low speed until they are able to jog steadily. Instruct them to make an effort to jog at a progressively increasing speed on a treadmill within a safe and comfortable range, known as Progressive Training. Then, have them practice running on the ground along the runway at a comfortable high speed until they are able to run steadily at this speed.
Finally, instruct the subject to try to start jogging from different starting lines within the starting area several times, to find an appropriate starting position, ensuring that the right foot naturally strikes and completely contacts the force platform when passing by. Begin by asking the subject to stand in a stationary, neutral pose in the center of the capture volume to capture the static data. Click the start button in the subject capture section to capture approximately 150 frames.
Then, click the stop button. Next, select static in the pipeline pull-down list in the subject calibration section. Check the left foot and the right foot options in the static settings pane.
Click the start button in the subject calibration section. Then, ask the subject to stand at the appropriate starting position. Click the start button in the capture section to begin capturing and then immediately give the subject the oral instruction to go jogging.
Ensure that the right foot naturally strikes and completely contacts the force platform when passing by. For jogging trials, ask the subjects to jog at the comfortable low speed that they were familiar with during preparation. For running trials, ask the subjects to run at the comfortable high speed that they had been familiar with during preparation.
Allow for a two minute rest between two trials. Finally, after the subject comes to the end of the runway, click the stop button. These results indicated that, except for the knee and hip motions in the sagittal plane, all three joint range of motion of IEW was generally greater than that of EW.Significant speed effect on joint range of motion only existed in the hip-flexion extension.
The GRF time curve of EW is characterized by an initial peak immediately followed by a small wave during the shock absorption period, particularly during running. In contrast, that of IEW is relatively fluent after the initial peak. There is no significant difference in the impact force between EW and IEW, but the loading rate of EW was significantly higher during running.
While attempting this procedure, it's important to remember to recalibrate the cameras reading the capture volume and to calibrate the first parameter to their own level before starting each and every trial to ensure the capture accuracy. Following this procedure, other parameters, such as joint momentum, can be calculated in order to answer additional questions, like whether wearing high-heeled shoes would factor in other accuracy and measurements of only other accuators. Of these, the value meant that this math ought to emphasize the importance of the allocating their subjects wearing experience of the high-heeled shoes to provide more specific information and reducing the inferring to target the population.
After watching this video, you should understand how to use or understand the math or to perform the experiment with the high heel and get the accuracy as well as criteria suggests based on the different wearing experience.
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