The potential influence of stochastic resonance vibrations on neuromuscular strategies and center of pressure sway during single-leg stance

This study aimed to compare the postural balance of professional tae kwon do athletes with a non-tae kwon do adult group. Nineteen participants (nine tae kwon do practitioners and ten non-tae kwon do practitioners) were tested. To measure the postural sway, a force platform was used and the equipment recorded the main parameters: area of center of pressure; mean frequency, and velocity of center of pressure for both anteroposterior and mediolateral directions were measured for all participants. Before starting the assessment, the subjects received instructions and performed familiarization with the equipment and protocol. Participants were instructed to carry out three balance tests on a single-leg stance position with eyes opened. Values obtained in the postural assessment of professional athletes with the force platform were lower for all parameters compared to non-practitioners, except the frequency of center of pressure in the mediolateral direction. However, a significant difference (p=0.021) between the groups was found only in the center of pressure velocity parameter in the anteroposterior direction. These results have any implications on sport rehabilitation programs for balance assessments in athletes.

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Center of pressure-based postural sway differences on parallel and single leg stance in Olympic deaf basketball and volleyball players

Journal of Exercise Rehabilitation ◽

10.12965/jer.2142558.279 ◽

2021 ◽

Vol 17 (6) ◽

pp. 418-427

Author(s):

Yücel Makaracı ◽

Recep Soslu ◽

Ömer Özer ◽

Abdullah Uysal

Keyword(s):

Postural Control ◽

Postural Stability ◽

Postural Sway ◽

Center Of Pressure ◽

Force Plate ◽

Basketball Players ◽

Male Athletes ◽

Significant Difference ◽

Single Leg Stance ◽

Volleyball Players

In sports such as basketball and volleyball, loss of balance due to the inability to maintain body stability and lack of postural control adversely affect athletic performance. Deaf athletes appear to struggle with balance and postural stability problems. The purpose of this study was to examine postural sway values in parallel and single leg stance of Olympic deaf basketball and volleyball players and reveal differences between the branches. Twenty-three male athletes from the Turkish national deaf basketball (n= 11) and volleyball (n= 12) teams participated in the study. After anthropometric measurements, the subjects completed postural sway (PS) tests in parallel/single leg stances with open eyes and closed eyes on a force plate. PS parameters (sway path, velocity, and area) obtained from the device software were used for the statistical analysis. The Mann-Whitney U-test was used to compare differences in PS parameters between basketball and volleyball players, and the alpha value was accepted as 0.05. Volleyball players had significantly better results in parallel stance and dominant leg PS values than basketball players (P<0.05). There was no significant difference between the groups in nondominant leg PS values (P>0.05). We think that proprioceptive and vestibular system enhancing training practices to be performed with stability exercises will be beneficial in terms of both promoting functional stability and interlimb coordination. Trainers and strength coaches should be aware of differences in the postural control mechanism of deaf athletes.

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Center of Pressure Regularity With and Without Stochastic Resonance Stimulation in Stable and Unstable Ankles

Athletic Training & Sports Health Care ◽

10.3928/19425864-20140710-04 ◽

2014 ◽

Vol 6 (4) ◽

pp. 170-178 ◽

Cited By ~ 3

Author(s):

Stephen M. Glass ◽

Scott E. Ross ◽

Brent L. Arnold ◽

Christopher K. Rhea

Keyword(s):

Stochastic Resonance ◽

Center Of Pressure

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The Effect of Holographic Wristbands on Proprioception

Internet Journal of Allied Health Sciences and Practice ◽

10.46743/1540-580x/2015.1513 ◽

2015 ◽

Author(s):

Tyler Dexter ◽

Valerie Herzog ◽

Ericka Zimmerman

Keyword(s):

Athletic Training ◽

Repeated Measures ◽

Center Of Pressure ◽

Physiological Effect ◽

The Body ◽

Activity Levels ◽

The Past ◽

Single Leg Stance ◽

Pressure Area ◽

Center Of Pressure Velocity

Context: Wearing wristbands embedded with holograms at certain frequencies are believed to increase proprioception. There has been very little research to determine if holographic wristbands have any physiological effect on the body. Objective: To determine if the holograms embedded in the wristbands will improve proprioception during a single leg stance test on the dominant foot. Design and Setting: Controlled Athletic Training laboratory study. Participants: Twenty-four healthy college students of different activity levels (7 men, 17 women; age = 22.6 ± 1.2 years, height = 170.18 ± 12.10 cm, mass = 69.51 ± 15.63 kg) without any lower extremity injuries in the past three months participated. The subjects were also excluded if they have worn a holographic wristband in the past three months. Intervention(s): Each subject completed two trials under three protocols (holographic wristband, placebo wristband, no wristband) in a counter-balanced order for a total of six different tests with each test lasting 30 seconds. Subjects tested under each protocol using a single leg stance test on their dominant leg, hands on their hips, and looking forward at a fixed point on the wall. Main Outcome Measure(s): Balance analysis of the subjects was performed using an AMTI AccuSway Force Platform measuring Center of Pressure velocity and Center of Pressure Area 95. A statistical analysis of the data was done using repeated measures to test for differences between each condition. Results: The results showed no significant differences between protocols for Center of Pressure velocity (F = 1.130, P = .332). We also found no significant differences between protocols for Center of Pressure Area 95 (F = 1.271, P = .290). Conclusions: The results showed that the use of the holographic wristbands or a placebo wristband did not appear to have an impact on static balance. Overall, the results show that the use of the wristbands did not appear to have an impact on proprioception.

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Effect of Rear-Foot Orthotics on Postural Control in Healthy Subjects

Journal of Sport Rehabilitation ◽

10.1123/jsr.10.1.36 ◽

2001 ◽

Vol 10 (1) ◽

pp. 36-47 ◽

Cited By ~ 20

Author(s):

Jay Hertel ◽

Craig R. Denegar ◽

W.E. Buckley ◽

Neil A. Sharkey ◽

Wayne L. Stokes

Keyword(s):

Young Adults ◽

Postural Control ◽

Repeated Measures ◽

Healthy Subjects ◽

Sagittal Plane ◽

Center Of Pressure ◽

Frontal Plane ◽

Type Design ◽

Single Leg Stance ◽

Healthy Participants

Objective:To identify changes in sagittal- and frontal-plane center of pressure (COP) excursion length and velocity during single-leg stance under 6 orthotic conditions.Design:1 × 6 repeated-measures.Setting:University biomechanics laboratory.Participants:Fifteen healthy young adults without excessive forefoot, arch, or rear-foot malalignments.Measurements:Selected variables of COP length and velocity were calculated in both the frontal and sagittal planes during three 5-second trials of quiet unilateral stance.Methods:Postural control was assessed under 6 conditions: shoe only and 5 orthotics.Results:The medially posted orthotic caused the least frontal COP length and velocity, and the Cramer Sprained Ankle Orthotic® caused the greatest frontal-plane sway. No significant differences were found between the different orthotic conditions in sagittal-plane measures.Conclusions:Differently posted rear-foot orthotics had various effects on frontal-plane postural control in healthy participants. Further research is needed on pathological populations.

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Static postural balance in healthy individuals: Comparisons between three age groups

Motriz Revista de Educação Física ◽

10.1590/s1980-65742014000100013 ◽

2014 ◽

Vol 20 (1) ◽

pp. 85-91

Author(s):

Yanne Salviano Pereira ◽

Jéssica Mascena de Medeiros ◽

José Ângelo Barela ◽

Ana Maria Forti Barela ◽

César Ferreira Amorim ◽

...

Keyword(s):

Postural Balance ◽

Center Of Pressure ◽

Age Groups ◽

Young Group ◽

Older Individuals ◽

Healthy Individuals ◽

Single Leg Stance ◽

Support Conditions ◽

Anterior Posterior ◽

Visual Conditions

The aim of the study was to compare static postural balance of healthy individuals of three age groups in different conditions of support and vision. Seventy one individuals, divided into 3 groups, were analyzed: young group (YG: 22.2 ± 2.1 years), middle aged group (MAG: 50.7 ± 5.7 years) and older individuals group (EG: 66.8 ± 5.4 years). Their balance was tested on a force platform, under 3 support and 3 visual conditions. Measures included: total (TD), anterior-posterior (APD) and mediolateral displacement (MLD) of the center of pressure (CoP). ANOVA revealed significant differences for interactions between group X support conditions and group X visual conditions for the 3 variables (p<0.01), with greater displacements for the MAG and EG groups during single-leg stance with partial and occluded vision (p<0.05). Static postural balance decreased over time in healthy individuals, and conditions of support and visual negatively affected balance with the increment of age.

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