Postural stability with exhaustive repetitive sit-to-stand exercise in young adults

Bryanton, Megan A.; Beznoska, Martin

doi:10.1016/j.humov.2016.06.006

Cited by 17 publications

(15 citation statements)

References 34 publications

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“…Given the nature and duration of the study, it is possible that participants experienced a level of fatigue that may have influenced the increase in non-stimulus coupled force variability observed in post-standing trials. Previous research has shown that fatigue can, in some cases, increase center of pressure and sway variability 52 , 53 . Since we did not take measures of participant fatigue, it is difficult to draw conclusions as to whether fatigue contributed to this increased variability.…”

Section: Discussionmentioning

confidence: 99%

Vestibular attenuation to random-waveform galvanic vestibular stimulation during standing and treadmill walking

Hannan

Todd

Pearson

et al. 2021

Sci Rep

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The ability to move and maintain posture is critically dependent on motion and orientation information provided by the vestibular system. When this system delivers noisy or erred information it can, in some cases, be attenuated through habituation. Here we investigate whether multiple mechanisms of attenuation act to decrease vestibular gain due to noise added using supra-threshold random-waveform galvanic vestibular stimulation (GVS). Forty-five participants completed one of three conditions. Each condition consisted of two 4-min standing periods with stimulation surrounding a 1-h period of either walking with stimulation, walking without stimulation, or sitting quietly. An instrumented treadmill recorded horizontal forces at the feet during standing and walking. We quantified response attenuation to GVS by comparing vestibular stimulus-horizontal force gain between conditions. First stimulus exposure caused an 18% decrease in gain during the first 40 s of standing. Attenuation recommenced only when subjects walked with stimulation, resulting in a 38% decrease in gain over 60 min that did not transfer to standing following walking. The disparity in attenuation dynamics and absent carry over between standing and walking suggests that two mechanisms of attenuation, one associated with first exposure to the stimulus and another that is task specific, may act to decrease vestibulomotor gain.

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Section: Discussionmentioning

confidence: 99%

Vestibular attenuation to random-waveform galvanic vestibular stimulation during standing and treadmill walking

Hannan

Todd

Pearson

et al. 2021

Sci Rep

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show abstract

“…The subjects completed the sit-to-stand activity as part of the fatigue protocol (STS). This fatigue protocol was referred from the study by Bryanton and Bilodeau [ 21 ]: “subjects were seated on an armless bench (44 cm deep, 440 cm wide, 46 cm high) with subjects' feet were positioned shoulder width apart, barefoot, with heal and toe positions marked on the force platform to ensure that the feet did not move during the fatigue protocol. Prior to standing, subjects were instructed to sit in a comfortable erect posture with their arms folded across their chest to deter the use of compensatory arm swinging.…”

Section: Methodsmentioning

confidence: 99%

Effect of Lower Limb Muscle Fatigue on Fall Risk for Transfemoral Amputee: A Pilot Study

Safee

Osman

2021

Occupational Therapy International

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Muscle fatigue is a decline in muscle maximum force during contraction and can influence the fall risk among people. This study is aimed at identifying the effect of fatigue on prospective fall risk in transfemoral amputees (TFA). Fourteen subjects were involved in this study with TFA ( 34.7 ± 8.1 yrs, n = 7 ) and normal subjects ( 31.1 ± 7.4 yrs, n = 7 ). Fatigue of lower limb muscles was induced with the fatigue protocol. Subjects were tested prefatigue and postfatigue using the standardized fall risk assessment. All results were calculated and compared between pre- and postfatigue to identify fatigue’s effect on both groups of subjects. The results showed that the fall risk increased significantly during pre- and postfatigue for TFA ( p = 0.018 ), while there were no significant differences in normal subjects ( p = 0.149 ). Meanwhile, the fall risk between TFA and normal subjects for prefatigue ( p = 0.082 ) and postfatigue ( p = 0.084 ) also showed no significant differences. The percentage (%) of increased fall risk for TFA was 19.2% compared to normal subjects only 16.7%. However, 61.4% increased of % fall risk in TFA after fatigue by using the baseline of the normal subject as the normalized % of fall risk. The increasing fall risks for TFA after fatigue are three times higher than the potential fall risk in normal subjects. The result indicates that they need to perform more precautions while prolonging lower limb activities. These results showed the implications of fatigue that can increase the fall risk due to muscle fatigue from repetitive and prolonged activities. Therefore, rehabilitation programs can be done very safely and precisely so that therapists can pursue fitness without aggravating existing injuries.

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“…The interaction of muscle tone, elasticity and stiffness ensures joint stability when movement is performed [23]. These components are also considered to provide the most substantial protection in maintaining the joint stable in the presence of unexpected interferences [24,25].…”

Section: Introductionmentioning

confidence: 99%

Associations between muscle myotonometry (a)symmetry and functional movement performance in young women and men

Radžiūnas¹,

Radžiūnienė²,

Vainoras³

et al. 2018

J. meas. eng.

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Asymmetry of body parts refers to absence of symmetry and unevenly developed body parts in terms of the axis and plane. It has been long ago noticed that no perfectly correct human body exists, and bodies are to a greater or lesser extent asymmetric. A passive way of life, insufficient movement and inappropriate ergonomics of the workplace have a negative impact on the skeletal muscle system, usually resulting in reduced muscle power, static and dynamic muscle endurance, and altered muscle tone. The aim is to determine whether muscle myotonometry parameters are informative in early risk diagnostics to predict the likelihood of skeletal muscle system trauma. The study involved 382 people aged 18-24. Participants were devided into two groups: according to the accumulated composite score. Testing was made one time. The study consisted of functional movement and myotonometry evaluation. The study analyses and presents comparisons of the results depending on the trauma likelihood and sex. In addition, asymmetry of the left and the right body side is investigated. The analysis of the asymmetries (delta) in the frequency of damped oscillations of trapezius, biceps femoris, gastrocnemius (inner and outer part) on the left and right sides of the body demonstrated greater asymmetries between the left and the right sides of the body in the groups of both men and women with a lower chance of trauma. The assessment of asymmetries in femoris rectus and tibialis anterior between the left and the right sides of the body showed differences in the frequency of damped oscillations in all groups. Muscle myotonometry parameters are informative and may be used in early risk diagnostics to predict skeletal muscle system trauma. The asymmetry in tibialis muscle tone between the left and the right leg causes poorer parameters of functional movement performance in women. No associations were found to exist with the ability to perform functional movements in men. The asymmetry in femoris muscle tone between the left and right leg demonstrates the ability of young subjects to perform functional movements. It is characteristic of men and, to a lower extent, of women.

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Postural stability with exhaustive repetitive sit-to-stand exercise in young adults

Cited by 17 publications

References 34 publications

Vestibular attenuation to random-waveform galvanic vestibular stimulation during standing and treadmill walking

Vestibular attenuation to random-waveform galvanic vestibular stimulation during standing and treadmill walking

Effect of Lower Limb Muscle Fatigue on Fall Risk for Transfemoral Amputee: A Pilot Study

Associations between muscle myotonometry (a)symmetry and functional movement performance in young women and men

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