The relative and absolute reliability of center of pressure trajectory during gait initiation in older adults

Khanmohammadi, Roya; Talebian, Saeed; Hadian, Mohammad Reza; Bagheri, Hossein

doi:10.1016/j.gaitpost.2016.11.042

Cited by 10 publications

(8 citation statements)

References 26 publications

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“…Previous studies have investigated the reliability of plantar pressure measurements using other instruments [8,10,13]. However, it should be noted that the psychometric properties of a measure cannot be generalized.…”

Section: Discussionmentioning

confidence: 99%

Test-retest reliability of baropodometry in young asyntomatic individuals during semi static and dynamic analysis

et al. 2018

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Introduction: Postural control is a multidimensional construct modulated by the integration of sensory information and muscular activity. One of the challenges in clinical practice and scientific research is the postural data collection of objective control data. Thus, baropodometry can be a promising instrument for analysis. Objective: To evaluate the absolute and relative reliability of baropodometry by means of test-retest in young asymptomatic subjects during semi-static and dynamic analysis. Methods: This is a methodological study, approved by the Research Ethics Committee of UFJF (1,803,411). Sample selection was performed by convenience. Healthy individuals aged 18 to 35 years were included in the study without gender restriction. Participants with pain or any clinical signs of overload which led to unfeasible collection were excluded from the analysis. The variables analyzed were contact surface, maximum and mean pressure, index bow, pressure center and pressure areas in the forefoot, midfoot and hindfoot. Results: 33 individuals (total of 66 feet) participated in this study. The mean body mass of the participants was 63.0 ± 9.9kg, height of 163.4 ± 30.1cm, BMI of 23.7 ± 2.8 kg/m2. It was observed that five out of the eight variables evaluated in the semi-static analysis presented high reliability (≥ 0.70). On the other hand, the reproducibility of the measures in the dynamic analysis was low to moderate (≤ 0.69). Conclusion: Baropodometry findings should be interpreted with caution in clinical practice and in scientific research. It is suggested that complementary assessments be made for decision-making assistance.

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Section: Discussionmentioning

confidence: 99%

Test-retest reliability of baropodometry in young asyntomatic individuals during semi static and dynamic analysis

et al. 2018

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“…During EO and EC trails participants’ feet were placed parallel and at hip width. In each conditions of the test measurements were repeated tree times, and for the analyzes the average value of the tests was selected (Khanmohammadi et al 2016). During each trial, subjects were asked to stand as still as possible, with their hands alongside the hips, looking straight forward.…”

Section: Methodsmentioning

confidence: 99%

Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly women

et al. 2017

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Mechanisms underpinning age-related decreases in muscle strength and muscle mass relate to chronic inflammation. Physical activity induces an anti-inflammatory effect, but it is modulated by additional factors. We hypothesized that vitamin D, which has also anti-inflammatory activity will modify adaptation to exercise and reduce inflammation in elderly women. Twenty-seven women aged 67 ± 8 years were included and divided into groups with baseline vitamin D concentration more than 20 ng mL−1 (MVD) and less than 20 ng mL−1 (LVD). Both groups performed 1 h Nordic Walking (NW) training combined with vitamin D supplementation for 12 weeks. Serum concentrations of inflammation markers, branched amino acids, vitamin D, muscle strength and balance were assessed at the baseline and three days after intervention. The training caused the significant decrease in concentration of pro-inflammatory proteins HMGB1 (30 ± 156%; 90% CI) and IL-6 (−10 ± 66%; 90% CI) in MVD group. This effects in group MVD were moderate, indicating vitamin D as one of the modifiers of these exercise-induced changes. Rise of myokine irisin induced by exercise correlated inversely with HMGB1 and the correlation was more pronounced at the baseline as well as after training among MVD participants. Although the intervention caused the leucine level to rise, a comparison of the recorded response between groups and the adjusted effect indicated that the effect was 20% lower in the LVD group. Overall the applied training program was effective in reducing HMGB1 concentration. This drop was accompanied by the rise of myokine irisin and better uptake of leucine among women with higher baseline vitamin D.

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“…The participants were instructed to assume a comfortable and natural standing position, barefoot, upper limbs alongside the trunk, one foot on each force platform. The participants were tested barefoot to avoid any influence of footwear and to make our results comparable to that of previous studies [11,[16][17][18]. They were asked to stand as still as possible.…”

Section: Data Collectionmentioning

confidence: 92%

Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior

et al. 2021

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The purpose of this study was to investigate the effects of different vertical positions of an asymmetrical load on the anticipatory postural adjustments phase of gait initiation. Sixty-eight college students (32 males, 36 females; age: 23.65 ± 3.21 years old; weight: 69.98 ± 8.15 kg; height: 1.74 ± 0.08 m) were enrolled in the study. Ground reaction forces and moments were collected using two force platforms. The participants completed three trials under each of the following random conditions: no-load (NL), waist uniformly distributed load (WUD), shoulder uniformly distributed load (SUD), waist stance foot load (WST), shoulder stance foot load (SST), waist swing foot load (WSW), and shoulder swing foot load (SSW). The paired Hotelling’s T-square test was used to compare the experimental conditions. The center of pressure (COP) time series were significantly different for the SUD vs. NL, SST vs. NL, WST vs. NL, and WSW vs. NL comparisons. Significant differences in COP time series were observed for all comparisons between waist vs. shoulder conditions. Overall, these differences were greater when the load was positioned at the shoulders. For the center of mass (COM) time series, significant differences were found for the WUD vs. NL and WSW vs. NL conditions. However, no differences were observed with the load positioned at the shoulders. In conclusion, only asymmetrical loading at the waist produced significant differences, and the higher the extra load, the greater the effects on COP behavior. By contrast, only minor changes were observed in COM behavior, suggesting that the changes in COP (the controller) behavior are adjustments to maintain the COM (controlled object) unaltered.

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The relative and absolute reliability of center of pressure trajectory during gait initiation in older adults

Cited by 10 publications

References 26 publications

Test-retest reliability of baropodometry in young asyntomatic individuals during semi static and dynamic analysis

Test-retest reliability of baropodometry in young asyntomatic individuals during semi static and dynamic analysis

Changes in pro-inflammatory markers and leucine concentrations in response to Nordic Walking training combined with vitamin D supplementation in elderly women

Effects of additional load at different heights on gait initiation: A statistical parametric mapping of center of pressure and center of mass behavior

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