Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 24.029
Filtrar
1.
Zh Nevrol Psikhiatr Im S S Korsakova ; 120(10. Vyp. 2): 16-21, 2020.
Artigo em Russo | MEDLINE | ID: mdl-33205926

RESUMO

Balance disorders and recurring falls are the most frequent causes of medical treatment in old age. Chronic cerebral vascular insufficiency is considered to be the cause of instability in most of these cases, and its role in the development of postural instability in old age is likely to be greatly overrated. At the same time, the role of chronic peripheral vestibular disorders, by contrast, is underestimated. The emergence in recent years of sensitive, specific and, at the same time, relatively accessible methods of diagnosing peripheral vestibulopathies has led to a much more frequent diagnosis of peripheral vestibulopathies, and their role in the development of postural instability in elderly patients is being revisited. This review considers current approaches to the diagnosis and treatment of bilateral vestibulopathy.


Assuntos
Vestibulopatia Bilateral , Doenças Vestibulares , Acidentes por Quedas , Idoso , Tontura , Humanos , Pacientes , Equilíbrio Postural , Doenças Vestibulares/diagnóstico
2.
Codas ; 32(6): e20180246, 2020.
Artigo em Português, Inglês | MEDLINE | ID: mdl-33206770

RESUMO

PURPOSE: to analyze the postural balance of independent elderly women and their relation with aspects of health, ages and quality of life. METHODS: a total of 44 independent elderly women, classified according to the scales: Index of Independence in Daily Life Activities (DLA) and Instrumental Activities of Daily Life (IADL), aged 70.5 years (+6.64), submitted to the Foam-Laser Dynamic Posturography were used to evaluate the vestibular, proprioceptive and visual functions; the Dizziness Handicap Inventory (DHI) questionnaire on subjects with dizziness and the WHOQOL-Bref quality of life questionnaire. RESULTS: the tests showed a significant difference between the changes in the posturographic evaluation and health aspects such as dizziness complaint (p = 0.02), metabolic diseases (p = 0.04), cardiovascular diseases (p = 0.02) and with the use of continuous medication (p = 0.03), self-reported. The older women presented lower scores in the functional domain of the DHI (p=0.02), showing a lower handicap in activities of daily living and the longer the quality of life in the WHOQOL-Bref psychological domain (p=0.04). CONCLUSION: the presence of dizziness and systemic diseases had a negative impact on postural balance and on the quality of life of the elderly women.


Assuntos
Atividades Cotidianas , Doenças Vestibulares , Idoso , Tontura , Feminino , Humanos , Equilíbrio Postural , Qualidade de Vida , Inquéritos e Questionários , Vertigem
3.
BMC Geriatr ; 20(1): 483, 2020 11 18.
Artigo em Inglês | MEDLINE | ID: mdl-33208117

RESUMO

BACKGROUND: Exercise interventions, particularly those targeting strength and balance, are effective in preventing falls in older people. Activity levels are generally below recommended levels and reduce with age. There is concern that exercise levels may be further reduced in the context of the COVID-19 pandemic. Digital approaches may offer a means for older people to engage in strength and balance exercises independently in their own homes. The objective of this review was to identify and evaluate existing apps and websites to support independent engagement in strength and balance exercises by older people. METHODS: We conducted a rapid review of apps and websites, following PRISMA guidelines. We searched for available apps in the Android and iOS app stores, and performed a database search (MEDLINE and EMBASE) for apps in development. We searched for websites using the Google search engine. Apps and websites were evaluated in terms of existing evidence for effectiveness, use of behaviour change techniques (BCTs), and quality. RESULTS: We evaluated 13 apps and 24 websites on the basis of our selection criteria. Considering the evidence-base, quality and BCT scores, four apps and six websites are recommended for use by older people who wish to engage in exercise independently in their own homes. No apps or websites have been to RCT evaluation at the time of review. CONCLUSIONS: Apps and websites have the potential to provide a convenient, cost-effective, and accessible means for many older adults to engage in strength and balance training and reduce falls risk.


Assuntos
Infecções por Coronavirus , Terapia por Exercício , Aplicativos Móveis , Força Muscular , Pandemias , Pneumonia Viral , Equilíbrio Postural , Acidentes por Quedas/prevenção & controle , Idoso , Idoso de 80 Anos ou mais , Betacoronavirus , Humanos
4.
Stud Health Technol Inform ; 273: 197-202, 2020 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-33087612

RESUMO

Measuring the center of pressure (CoP) for a subject positioned on a force plate is one of the most commonly used tools to investigate balance. Several studies have proven a significant degradation of the body's stability after the age of 60. The conclusions, however, are based on a limited number of indicators and without systematic nonlinear analysis methods being used to evaluate the progression of CoP parameter values. Neither the change in CoP movement in subjects over 60 years of age nor the considerations of their body mass index (BMI) has been systematically evaluated by nonlinear methods so far. This study is based on one of the frequent methods for nonlinear evaluation - the Recurrent Quantification analysis. This article discusses the applicability of this method with regards to the evaluation of changes in postural stability of subjects over 60 years of age. Postural stability changes were evaluated using CoP motion and tested by the nonlinear method. For this research purpose, a group of 103 elderly women were selected and divided into age-respective groups of 60-69 years and 70-79 years old. Each age group was further divided into a subgroup of normal and overweight subjects according to their BMI. The following recurrent analysis parameters were employed in the evaluation of CoP motion in medial-lateral and anterior-posterior directions: determinism (DET), laminarity (LAM) and trapping time (TT). The results of the Wilcoxon test revealed a statistically significant difference between the values in parameters for the different age groups of overweight subjects almost in all the cases. Conversely, statistically significant differences between age groups rarely occurred in a subgroup of subjects with a normal BMI.


Assuntos
Equilíbrio Postural , Postura , Idoso , Índice de Massa Corporal , Feminino , Humanos , Pessoa de Meia-Idade , Movimento , Sobrepeso
5.
PLoS One ; 15(10): e0236205, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33095774

RESUMO

The present research aims at quantifying the impact of practicing a new coordination pattern with an online visual feedback on the postural coordination performed on a mechanical horse. Forty-four voluntary participants were recruited in this study. They were randomly assigned to four practice groups based on i) with or without feedback (i.e., group 1, control, did not receive the feedback; group 2, 3 and 4 received an online feedback during practice) and ii) the specific trunk/horse coordination to target during practice (group 1, target coordination = 180° (without feedback); group 2, target coordination = 0°; group 3, target coordination = 90°; group 4, target coordination = 180°). All participants performed pre-, practice, post- and retention sessions. The pre-, post- and retention sessions consisted of four trials, with one trial corresponding to one specific target coordination to maintain between their own oscillations and the horse oscillations (spontaneous, 0°, 90°, and 180°). The practice phase was composed of three different sessions during which participants received an online feedback about the coordination between their own oscillations and the horse oscillations. Results showed a significant change with practice in the trunk/horse coordination patterns which persisted even after one month (retention-test). However, all the groups did not show the same nature of change, evidenced by a high postural variability during post-test for 0° and 90° target coordination groups, in opposition to the 180° and spontaneous groups who showed a decrease in coordination variability for the 180° group. The coordination in anti-phase was characterized as spontaneously adopted by participants on the mechanical horse, explaining the ease of performing this coordination (compared to the 0° and 90° target coordination). The effect of online visual feedback appeared not only on the coordination pattern itself, but most importantly on its variability during practice, including concerning initially stable coordination patterns.


Assuntos
Retroalimentação , Atividade Motora/fisiologia , Equilíbrio Postural , Prática Psicológica , Desempenho Psicomotor , Postura Sentada , Adolescente , Adulto , Animais , Atenção , Fenômenos Biomecânicos , Cavalos , Humanos , Sistemas On-Line , Tronco , Adulto Jovem
6.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 3114-3117, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018664

RESUMO

Identifying balance deficits associated with aging is critical to preventing falls in elderly people. The purpose of this study was to investigate the effects of aging on the multi-muscle synergy in lower extremities during standing on sloped surfaces. Eighteen healthy elderly subjects and 18 healthy young subjects were recruited in the experiment. Subjects were required to stand quietly on slopes at 5 different angles for 30 s with and without visual feedback. Surface electromyography signals of muscles in the lower limbs were collected simultaneously during standing. The muscle synergy of synergistic muscles and of antagonistic muscles were quantified by the parameters of multidimensional recurrence quantification analysis (MdRQA). The results showed that the dynamical synergies in synergistic and antagonistic muscle groups were significantly enhanced in elderly group, especially during standing on sloped surfaces (p < 0.05). The MdRQA parameters were significantly increased when standing without visual feedback than with visual feedback (p < 0.05). The aging and the absence of visual feedback led to more deterministic structures in the dynamical coupling of muscle activations, indicating strengthened synergistic contractions of muscles. These changes in elderly may increase the restriction on balance control and reduce the adaptability of motor system to potential external perturbations. This study shed light on the effects of aging on standing balance control and may facilitate to develop novel strategies for evaluation of aging and predication of falls.


Assuntos
Equilíbrio Postural , Posição Ortostática , Idoso , Eletromiografia , Retroalimentação Sensorial , Humanos , Músculo Esquelético , Adulto Jovem
7.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 5678-5681, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33019265

RESUMO

This paper describes the effects of a smartphone-based wearable telerehabilitation system (called Smarter Balance System, SBS) intended for in-home dynamic weight-shifting balance exercises (WSBEs) by individuals with Parkinson's disease (PD). Two individuals with idiopathic PD performed in-home dynamic WSBEs in anterior-posterior (A/P) and medial-lateral (M/L) directions, using the SBS 3 days per week for 6 weeks. Exercise performance was quantified by cross-correlation (XCORR) and position error (PE) analyses. Balance and gait performance and level of fear of falling were assessed by limit of stability (LOS), Sensory Organization Test (SOT), Falls Efficacy Scale (FES), Activities-specific Balance Confidence (ABC), and Dynamic Gait Index (DGI) at the pre-(beginning of week 1), post-(end of week 6), and retention-(1 month after week 6) assessments. Regression analyses found that exponential trends of the XCORR and PE described exercise performance more effectively than linear trends. Range of LOS in both A/P and M/L directions improved at the post-assessment compared to the pre-assessment, and was retained at the retention assessment. The preliminary findings emphasize the advantages of wearable balance telerehabilitation technologies when performing in-home balance rehabilitation exercises.


Assuntos
Doença de Parkinson , Smartphone , Telerreabilitação , Dispositivos Eletrônicos Vestíveis , Acidentes por Quedas/prevenção & controle , Terapia por Exercício , Medo , Humanos , Equilíbrio Postural
8.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 4571-4574, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33019011

RESUMO

Cerebellar ataxia (CA) refers to the impaired balance and coordination resulting from injury or degeneration of the cerebellum. Testing balance is one of the simplest means of assessing CA. This study compares instrumented assessment and clinical assessment scales of the balance test called Romberg's test. Inertial Measurement Unit (IMU) data were collected from a sensor attached to their chest of 53 subjects while they performed the test. The corresponding clinical scores were also tabulated. Using this data, 99 features were extracted to quantify acceleration, tremor and displacement of body sway. These features were filtered to identify the subset that better characterize the distinctive behavior of CA subjects. Elastic Net Regression model resulted a greater agreement (0.70 Pearson coefficient) with the clinical SARA scores. The overall results indicated that data from a single IMU sensor is sufficient to accurately assess balance in CA. The significance of this study is that evaluation of balance using Recurrence Quantification Analysis produces a comprehensive framework for the assessment of CA.


Assuntos
Ataxia Cerebelar , Aceleração , Ataxia Cerebelar/diagnóstico , Humanos , Equilíbrio Postural , Tórax , Tremor
9.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 4600-4603, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33019018

RESUMO

Postural instability assessment is an important tool in fall risk analysis and for timely intervention of falls to reduce or prevent fall injuries. Traditionally fall risk is measured though postural sway assessment and is collected through forceplates by mapping Center of Pressure (COP) excursions or using motion analysis camera system for marker sway trajectories. However, both of these systems are expensive and lack portability to their usage in clinical environments. In this study, we developed a novel wearable low-cost MEMS inertial sensor and validated its usage for human postural sway assessment in standing posture with eyes open/closed, vibration/no vibration, and proprioception /low proprioception conditions. The two objectives of this study were: 1) To develop and validate an Inertial Measurement Unit (IMU) for sway analysis 2) To determine the feasibility of the system in detecting human postural imbalances such as reduced proprioception or presence of stochastic resonance induced through subthreshold vibrations on the feet. The novel IMU was tested for sway against infra-red marker on a specialized platform with 4-degrees of freedom. Many parameters of postural sway such as sway velocity, Root Mean Square (RMS), and sway path length could successfully detect subtle postural changes due to varying proprioceptive and sub-threshold vibration conditions. We found agreement in sway signal determinism from the two methods.Clinical Relevance- This wearable sensor technology has potential to determine balance in reliable, easy and accurate way in clinical environments.


Assuntos
Equilíbrio Postural , Dispositivos Eletrônicos Vestíveis , Humanos , Postura , Propriocepção , Vibração
10.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 4863-4866, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33019079

RESUMO

When we face a super-aging society, there is a drastically increased need for efficient systems in terms of time and cost that can improve rehabilitation standards for the elderly people and other motor-impaired subjects. Human balance ability depends largely on the control of the full body center of mass (CoM), fall risks can be evaluated by estimating the subject-specific CoM displacement over the support polygon relating to the foot tracking. The CoM position is often estimated using what are known as anthropometric tables in biomechanics field. However, the parameters have been obtained from a standard population and will differ between subjects. Current existing fall risk assessment usually relies on the generic anthropometric table or need the center of pressure (CoP) recordings which are to be evaluated for the risk of fall. CoP measurements require force platform, wii board or specialized shoes, which limits the practical usage in the daily life environment. This work represents a personalized measure of balance that considers subject-specific body mass variations along with the motion tracking by Kinect Two. Based on our previous developments, we firstly verified the system with Kinect Two recording, and with adaptive support polygon extraction process, it realizes a real-time system for evaluating the personalized balance and fall risk visualization for unknown disturbance without needing force platform.


Assuntos
, Equilíbrio Postural , Idoso , Humanos
11.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 5176-5179, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33019151

RESUMO

Clinical assessment of Multiple Sclerosis relies heavily on the Expanded Disability Status Scale, a non-linear rating system based on physician assessment of disease progression and walking ability. This inherently makes this method both subjective and limited in repeatability. This study developed a technically derived outcome measure of posture to compare a cohort of Multiple Sclerosis and Control subjects during an Eyes-Open and Eyes-closed task. Analysing traditional sway parameters and a multiscale entropy derived complexity index of posturography showed a significant difference in medio-lateral sway between groups during the Eyes-Open condition. This technically derived outcome measure may be of clinical benefit in the longitudinal assessment of the functional impact of balance in MS cohorts and assist in the evaluation of pharmaceutical and rehabilitation interventions.


Assuntos
Esclerose Múltipla , Progressão da Doença , Entropia , Humanos , Equilíbrio Postural , Postura
12.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 5544-5547, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33019234

RESUMO

In this study, we propose a dynamic Bayesian network (DBN)-based approach to behavioral modelling of community dwelling older adults at risk for falls during the daily sessions of a hologram-enabled vestibular rehabilitation therapy programme. The component of human behavior being modelled is the level of frustration experienced by the user at each exercise, as it is assessed by the NASA Task Load Index. Herein, we present the topology of the DBN and test its inference performance on real-patient data.Clinical Relevance- Precise behavioral modelling will provide an indicator for tailoring the rehabilitation programme to each individual's personal psychological needs.


Assuntos
Realidade Aumentada , Equilíbrio Postural , Acidentes por Quedas/prevenção & controle , Idoso , Teorema de Bayes , Humanos , Modalidades de Fisioterapia
13.
Arch Osteoporos ; 15(1): 166, 2020 10 20.
Artigo em Inglês | MEDLINE | ID: mdl-33079259

RESUMO

In our study investigating the prevalence of osteosarcopenic obesity (OSO) in community-dwelling older adults and possible factors responsible for falls, we have found that prevalence of OSO is 10.7%. OSO does not significantly increase the odds of falling, whereas lower handgrip strength, ALMi and gait speed were independent factors associated with falls. PURPOSES: The purposes of the study were (a) to determine the prevalence of osteosarcopenic obesity (OSO) in community-dwelling older adults and (b) to investigate the association between falls and possible factors in individuals with and without OSO. METHODS: Medical records of patients aged ≥ 65 years were retrospectively reviewed. Individuals were diagnosed with OSO based on their T-score assessed by dual x-ray absorptiometry, handgrip strength, appendicular lean mass index (ALMi), gait speed and body fat percentile. Comorbidities, history of falls, depressive state, medications and anthropometric measures were also noted. RESULTS: A sample of 460 individuals were assessed (337 females; 123 males) and 49 patients were diagnosed with OSO. There was no statistically significant difference in falls between the two groups (OR: 0.768, 95% CI: 0.409-1.440, p: 0.41) and the presence of OSO was not significantly associated with increased odds of falling (OR: 1.755, 95% CI: 0.547-5.628, p: 0.344). Handgrip strength (OR: 0.931, 95% CI: 0.893-0.971, p: 0.001), ALMi (OR: 0.799, 95% CI: 0.708-0.901, p < 0.0001) and gait speed (OR: 0.529, 95% CI: 0.283-0.988, p: 0.046) were independently associated with falls in overall group, whereas interaction analysis did not reveal any significant moderator effect of OSO vs. non-OSO in the associations between risk factors and falls. CONCLUSION: The prevalence of OSO was 10.7%. OSO was not associated with elevated odds of falling, whereas lower handgrip strength, ALMi and gait speed were independent factors associated with falls. Further prospective research is needed to clarify the effect of OSO on odds of falling, in consideration with possible risk factors. TRIAL REGISTRATION NUMBER AND DATE: NCT04288401 /26.02.2020.


Assuntos
Fragilidade/fisiopatologia , Avaliação Geriátrica/métodos , Força da Mão/fisiologia , Obesidade/epidemiologia , Osteoporose Pós-Menopausa/epidemiologia , Osteoporose/epidemiologia , Sarcopenia/epidemiologia , Absorciometria de Fóton/métodos , Idoso , Antropometria/métodos , Estudos Transversais , Feminino , Humanos , Vida Independente , Masculino , Obesidade/fisiopatologia , Osteoporose/fisiopatologia , Equilíbrio Postural/fisiologia , Prevalência , Estudos Retrospectivos , Sarcopenia/fisiopatologia
14.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 812-815, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018109

RESUMO

The incidence of fall-related injuries in older adults is high. Given the significant and adverse outcomes that arise from injurious falls in older adults, it is of the utmost importance to identify older adults at greater risk for falls as early as possible. Given that balance dysfunction provides a significant risk factor for falls, an automated and objective identification of balance dysfunction in community dwelling older adults using wearable sensor data when walking may be beneficial. In this study, we examine the feasibility of using wearable sensors, when walking, to identify older adults who have trouble with balance at an early stage using state-of-the-art machine learning techniques. We recruited 21 community dwelling older women. The experimental paradigm consisted of two tasks: Normal walking with a self-selected comfortable speed on an instrumented treadmill and a test of reflexive postural response, using the motor control test (MCT). Based on the MCT, identification of older women with low or high balance function was performed. Using short duration accelerometer data from sensors placed on the knee and hip while walking, supervised machine learning was carried out to classify subjects with low and high balance function. Using a Gradient Boosting Machine (GBM) algorithm, we classified balance function in older adults using 60 seconds of accelerometer data with an average cross validation accuracy of 91.5% and area under the receiver operating characteristic curve (AUC) of 0.97. Early diagnosis of balance dysfunction in community dwelling older adults through the use of user friendly and inexpensive wearable sensors may help in reducing future fall risk in older adults through earlier interventions and treatments, and thereby significantly reduce associated healthcare costs.


Assuntos
Vida Independente , Equilíbrio Postural , Acelerometria , Acidentes por Quedas/prevenção & controle , Idoso , Feminino , Humanos , Aprendizado de Máquina
15.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 2845-2848, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018599

RESUMO

FRM1 premutation carriers exhibit various subtle deficits in balance and stability, prior to the development of the movement disorder Fragile X Associated Tremor/Ataxia Syndrome (FXTAS). Force plate posturography has increasingly been combined with the temporal sensitive imaging methods such as EEG to offer insight into the neural mechanisms which govern postural control. This study investigated cortical theta power during continuous balance and its relationship to balance performance in Fragile X premutation carriers. Eight premutation carriers and 6 controls stood on a force platform under altered sensory and cognitive conditions while postural sway and high-density EEG data were simultaneously recorded. Carriers exhibited greater sway area when sensory input was reduced (p=0.01) and cognitive load was increased (p=0.01), as well as significantly reduced frontal theta power compared to the Control Group. The relationship between theta power and postural control seen in the control group may indicate an increase in error detection caused by reduced visual input and greater discrepancies between expected and actual balance state. While the lower theta power in frontal regions of carriers may indicate a disruption in neural networks underpinning postural control. Such results provide new insight into the neural correlates of balance control in Fragile X premutation carriers.


Assuntos
Síndrome do Cromossomo X Frágil , Equilíbrio Postural , Ataxia/genética , Proteína do X Frágil de Retardo Mental , Síndrome do Cromossomo X Frágil/genética , Humanos , Tremor/genética
16.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 3347-3350, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018721

RESUMO

During human standing, it has been previously observed that information about the position and frequency of visual surround motion improves balance by reducing sway responses to external disturbances. However, experimental limitations only allowed for independent investigation of such parameters while being incapable of providing a fully immersive experience of a real environment. The aim of this study is to investigate the effect of visual information on dynamic body sway in the human upright stance by presenting perturbations through a virtual reality (VR) system. Moreover, we designed a new perturbation signal based on trapezoidal velocity (TrapV) pulses enabling us to simultaneously examine the effects of amplitude and velocity on balance control. The experiments included four different peak-to-peak amplitudes (1-10 degrees), and three velocities (2-10 degree/sec). The body angle, ankle torques and shank angles were measured and analyzed in response to each perturbation. The results reveal that stimuli with higher amplitudes evoked larger responses, while they were initially increased and reached a peak, then decreased by increasing the motion velocity of visual surround.


Assuntos
Realidade Virtual , Fenômenos Biomecânicos , Humanos , Equilíbrio Postural , Posição Ortostática , Visão Ocular
17.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 3811-3814, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018831

RESUMO

With the massive growth of the aging population worldwide, of utmost importance is reducing falls. Critical to reducing fall risk is one's ability to weight incoming sensory information towards maintaining balance. The purpose of this research was to investigate if simple, targeted sensory training on aging individuals (50 - 80 years old), including twelve healthy and eight individuals with chronic stroke, could improve their balance. Repeated sensory training targeted visual (via eyesopen/closed) and somatosensory inputs (via light touch to the fingertip as well as hard, soft foam, and hard foam support surfaces to the feet) during standing and dynamic base-ofsupport (BOS) exercises. Study participants underwent six weeks of training. Prior to and post training, standing balance was assessed via a simple, clinical measure: the balance error scoring system (BESS). Following several weeks of training, participants showed significant improvements in BESS errors: healthy participants for small BOS with limited somatosensory information (i.e., tandem and single-leg standing on foam) and participants with stroke in all conditions.Clinical Relevance- This research study demonstrated that simple, accessible exercises, can positively impact balance in the aging population, a pressing need.


Assuntos
Envelhecimento , Equilíbrio Postural , Acidentes por Quedas/prevenção & controle , Idoso , Idoso de 80 Anos ou mais , Exercício Físico , Terapia por Exercício , Humanos , Pessoa de Meia-Idade
18.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 3815-3818, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018832

RESUMO

The dynamics of the adjustment of center of pressure (CoP) has been utilized to understand motor control in human pathologies characterized by impairments in postural balance. The control mechanisms that maintain balance can be investigated via the analysis of muscle recruitment using electromyography (EMG) signals. In this work, we combined these two techniques to investigate balance control during upright standing in transfemoral unilateral amputees wearing a prosthesis. The dynamics of the CoP adjustments and EMG-EMG coherence between four muscles of the trunk and lower limb of 5 unilateral transfemoral amputees and 5 age-matched able-bodied participants were quantified during 30 s of quiet standing using the entropic half-life (EnHL) method. Two visual conditions, eyes open and eyes closed, were tested. Overall, the group of amputees presented lower EnHL values (higher dynamics) in their CoP adjustments than controls, especially in their intact limb. The EnHL values of the EMG-EMG coherence time series in the amputee group were lower than the control group for almost all muscle pairs under both visual conditions. Different correlations between the EnHL values of the CoP data and the EMG-EMG coherence data were observed in the amputee and control groups. These preliminary results suggest the onset of distinct neuromuscular adaptations following a unilateral amputation.Clinical Relevance - Understanding neuromuscular adaptation mechanisms after an amputation may serve to design better rehabilitation treatments and novel prosthetic devices with sensory feedback.


Assuntos
Amputados , Membros Artificiais , Adaptação Fisiológica , Humanos , Projetos Piloto , Equilíbrio Postural
19.
J Sports Med Phys Fitness ; 60(8): 1148-1158, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32955841

RESUMO

BACKGROUND: There is paucity of data examining the effectiveness of long-term Hatha yoga-based (HY) programs focused on the health-related fitness (H-RF) of asymptomatic, sedentary women. The purpose of this study was to examine the effects of a 6-month HY-based training program on H-RF components in sedentary middle-aged women. METHODS: Eighty sedentary women were randomly assigned into either the HY group (HYG) (N.=42) or the control group (CG) (N.=38). The 6-month HYG program involved a progressive series of Vinyasa Flow poses performed 3 times/week for 60 minutes (40 minutes within the exercise zone of 60-75% HRmax). The CG participants did not undergo any physical training or education. Health-related fitness parameters included measures of pre- and post-training: body composition, muscular strength and maximal voluntary isometric torques of elbow flexors and knee extensors, cardio-respiratory fitness, lower back and hamstring flexibility and a static-dynamic balance. RESULTS: Two-way mixed design ANOVA revealed significant main effects for all the indicators of H-RF. Tukey post-hoc tests confirmed that the HYG demonstrated significant improvements in every variable tested. Examples of the benefits achieved include (all P<.001): an average loss of 1.03 kg and a 4.82% decrease in body fat, 14.6% and 13.1% gains in isometric strength of the knee extensors and elbow flexors respectively, an increase in relative VO2max of 6.1% (33.12±5.30 to 35.14±4.82 mL/kg/min), a 4-cm or 10.4% increase in their MSAR, and an average improved Balance Index of 5.6 mm/s. Reversely, the CG showed non-significant changes in H-RF variables (all P>0.05; percent range from -1.4% to 1.1%). CONCLUSIONS: By participating in a moderate-intensity 6-month HY-based training program, middle-aged women can significantly improve their HR-F status. The application of progressive target heart rate goals facilitated greater than expected improvements in cardio-respiratory fitness and improvements in body composition.


Assuntos
Aptidão Física/fisiologia , Comportamento Sedentário , Ioga , Adulto , Composição Corporal , Aptidão Cardiorrespiratória , Cotovelo/fisiologia , Feminino , Frequência Cardíaca , Humanos , Contração Isométrica/fisiologia , Joelho/fisiologia , Estudos Longitudinais , Pessoa de Meia-Idade , Força Muscular/fisiologia , Equilíbrio Postural/fisiologia , Torque
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA