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1.
Exp Gerontol ; 131: 110816, 2019 Dec 17.
Artigo em Inglês | MEDLINE | ID: mdl-31862421

RESUMO

Gait parameters have been investigated as an additional tool for differential diagnosis in neurocognitive disorders, especially among healthy elderly (HE), those with mild cognitive impairment (MCI), and Alzheimer's disease (AD) patients. A videogrammetry system could be used as a low-cost and clinically practical equipment to capture and analyze gait in older adults. The aim of this study was to select the better gait parameter to differentiate these groups among different motor test conditions with videogrammetry analyses. Different motor conditions were used in three specific assessments: 10-meter walk test (10mWT), timed up and go test (TUGT), and treadmill walk test (TWT). These tasks were compared among HE (n=17), MCI (n=23), and AD (n=23) groups. One-way ANOVA, Kruskal-Wallis, and Bonferroni post-hoc tests were used to compare variables among groups. Then, an effect size (ES) and a linear regression analysis were calculated. The gait parameters showed significant differences among groups in all conditions, but not in TWT. Controlled by confounding variables, the gait velocity in 10mWT at usual speed, and TUGT in dual-task condition, predicts 39% and 53% of the difference among diagnoses, respectively. Finally, these results suggest that a low-cost and practical video analysis could be able to differentiate HE, those with MCI, and AD patients in clinical assessments.

2.
Arch Gerontol Geriatr ; 85: 103941, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31476630

RESUMO

Motor dysfunction increases in the moderate and severe stages of dementia. However, there is still no consensus on changes in mobility during its early stages. This meta-analysis aimed to measure the level of single-task functional mobility in older subjects with mild cognitive impairment (MCI) and/or Alzheimer's disease (AD). In a search of the PubMed, ISI Web of Knowledge, and Scopus databases, 2728 articles were identified. At the end of the selection, a total of 18 studies were included in the meta-analysis. Functional mobility was investigated using the timed up and go (TUG) test in all studies. When compared to healthy elderly (HE) adults, the following mean differences (MD) in seconds were found for the investigated subgroups: no amnestic MCI (MD = 0.26; CI95% = -0.77, 1.29), amnestic MCI (MD = 0.86; CI95% = -0.02, 1.73), very mild AD (MD = 1.32; CI95% = 0.63, 2.02), mild AD (MD = 2.43; CI95% = 1.84, 3.01), mild-moderate AD (MD = 3.01; CI95% = 2.47, 3.55), and mild-severe AD (MD = 4.51; CI95% = 1.14, 7.88); for the groups, the following MD were found: MCI (MD = 0.97; CI95% = 0.51, 1.44) and AD (MD = 2.66; CI95% = 2.16, 3.15). These results suggest a transition period in motor capacity between healthy aging and dementia, wherein functional mobility analysis in a single-task (TUG) can contribute to the diagnosis and staging of predementia states and AD.

3.
Rev. andal. med. deporte ; 12(1): 7-10, ene.-mar. 2019. tab
Artigo em Espanhol | IBECS | ID: ibc-184487

RESUMO

Objetivo: Elaborar, validar e testar a confiabilidade intra e interavaliadores de escalas observacionais para exame das técnicas motoras do saque flutuante com apoio, bloqueio ofensivo simples e defesa de manchete. Método: Participaram da validação de conteúdo e testagem da confiabilidade dezesseis (16) treinadores de voleibol com mais de 10 anos de experiência. Foram avaliadas cinco ações de cada uma das técnicas motoras, executadas por cinco atletas de voleibol federados. Foi utilizado o teste Kappa Múltiplo (KM) para análise estatística da força de concordância intra e interavaliadores e o nível de significância foi de p<0.05. Resultados: Os resultados mostraram que as três escalas obtiveram índices de concordância (≥87.5%) para a validade de conteúdo. Quanto à confiabilidade intra-avaliadores, os resultados demonstraram que as escalas observacionais saque, bloqueio e defesa obtiveram força de concordância boa (0.40≤KM≤0.59). A análise da confiabilidade interavaliadores das escalas observacionais saque (KM=0.75) e defesa (KM=0.66) obtiveram força de concordância muito boa e a escala observacional bloqueio (KM=0.82) obteve força de concordância excelente. Conclusões: As escalas criadas são confiáveis e adequadas para a análise das técnicas motoras saque flutuante com apoio, bloqueio ofensivo simples e defesa de manchete


Objetivo: Elaborar, validar y probar la confiabilidad intra e inter-evaluadores de escalas de observación para el examen de las técnicas motoras del saque flotante con apoyo, bloqueo ofensivo sencillo y defensa baja. Método: Participar en la validación del contenido y prueba de confiabilidad dieciséis entrenadores de voleibol con más de diez años de experiencia. Fueron evaluadas cinco acciones de cada una de las técnicas motoras, ejecutadas por cinco atletas de voleibol federados. Se utilizó la prueba Kappa Múltiple (KM) para el análisis estadístico de las fuerzas de concordancia intra e inter-evaluadores y el nivel de significancia fue de p<0.05. Resultados: Los resultados mostraron que las tres escalas obtuvieron índices de concordancia de (≥87.5%) para la validez de contenido. En cuanto a la confiabilidad intra-evaluadores, los resultados demostraron que las escalas de observación de saque, bloqueo y defensa obtuvieron fuerza de concordancia buena (0.40≤KM≤0.59). El análisis de la confiabilidad inter-evaluadores de las escalas de observación saque (KM= 0.75) y defensa (KM=0.66) obtuvieron fuerza de concordancia muy buena y la escala de observación de bloqueo (KM=0.82) obtuvo fuerza de concordancia excelente. Conclusiones: Las escalas creadas son confiables y adecuadas para el análisis de las técnicas motoras de saque flotante con apoyo, bloqueo ofensivo simple y defensa baja


Objective: Elaborate, validate and test the intra and inter-expert reliability of observational scales for the examination of the volleyball techniques, floating serve with support, simple offensive blocking and underhand defense. Methods: Sixteen coaches of the brazilian national volleyball team with more than ten years of practice in this sport, participated in the validation. Each coach evaluated five actions of each volleyball technique, performed by five federated volleyball athletes. Multiple Kappa test (KM) was used for statistical analysis of inter and intra-expert agreement strength and the significance level adopted was p <0.05. Results: The three scales obtained agreement indexes (≥87.5%) for content validity. Regarding intra-expert reliability, the results demonstrated that the observational, blocks, and defense scales had good agreement strength (0.40≤KM≤0.59). Regarding the inter-expert reliability, the observational scales serve (KM=0.75) and defense (KM=0.66) presente very good agreement strength and the observational scale block (KM=0.82) obtained excellent concordance strength. Conclusions: The scales are reliable and suitable for the analysis of motor skills floating serve with support, simple offensive blocking and underhand defense


Assuntos
Humanos , Voleibol/fisiologia , Desempenho Atlético/fisiologia , Destreza Motora/fisiologia , Técnicas de Observação do Comportamento/métodos , Reprodutibilidade dos Testes , Teste de Esforço/métodos , Aptidão Física/fisiologia
4.
Gait Posture ; 67: 117-121, 2019 01.
Artigo em Inglês | MEDLINE | ID: mdl-30317046

RESUMO

BACKGOUND: Leg length discrepancy (LLD) can be related to different pathologies, due to an inadequate distribution of mechanical loads, as well as gait kinematics asymmetries resulted from LLD. RESEARCH QUESTION: To validate a model to predict anatomical LLD (ALLD) based on gait kinematics. METHODS: Gait of 39 participants with different lower limb pathologies and mild discrepancy were collected. Pelvic, hip, knee and ankle kinematics were measured with a 3D motion analysis system and ALLD, femur discrepancy (FD) and tibia discrepancy (TD) were measured by a computerized digital radiograph. Three multiple linear regression models were used to identify the ability of kinematic variables to predict ALLD (model 1), FD (model 2) and TD (model 3). RESULTS: Difference between peak knee and hip flexion of the long and short lower limb was selected by models 1 (p < 0.001) and 2 (p < 0.001). Hip adduction was selected as a predictor only by model 1 (p = 0.05). Peak pelvic obliquity and ankle dorsiflexion were not selected by any model and model 3 did not retain any dependent variable (p > 0.05). Regression models predicted mild ALLD with moderate accuracy based on hip and knee kinematics during gait, but not ankle strategies. Excessive hip flexion of the longer limb possibly occurs to reduce the limb to equalize the LLD, and discrepancies of the femur and tibia affects gait cycle in a different way. SIGNIFICANCE: This study showed that kinematic variables during gait could be used as a screening tool to identify patients with ALLD, reducing unnecessary x-ray exposure and assisting rehabilitation programs.


Assuntos
Análise da Marcha/métodos , Desigualdade de Membros Inferiores/diagnóstico , Extremidade Inferior/fisiopatologia , Adulto , Fenômenos Biomecânicos , Feminino , Humanos , Imagem Tridimensional/métodos , Modelos Lineares , Extremidade Inferior/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Amplitude de Movimento Articular/fisiologia
5.
Motor Control ; 23(3): 294-303, 2019 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-30319011

RESUMO

Purpose: To analyze the interrelationships among motor coordination, body fat, and physical activity in adolescent boys. Methods: A total of 69 boys aged 12-14 years were recruited. Motor coordination was assessed using the Körperkoordinationstest für Kinder. Correlations (bivariate and partial) and mediation analysis were used to examine the interrelationships among the selected variables. Results: Body fat was significantly correlated with global motor coordination, walking backward (Motor Quotient 1), and one-legged hopping (Motor Quotient 2) scores with and without controlling for physical activity level. On the other hand, physical activity level was significantly correlated with global motor coordination and Motor Quotient 2 scores only in bivariate analyses (without controlling for body fat). Mediation analysis revealed that body fat percentage was not significantly related to physical activity. Conclusions: Correlations between motor coordination and physical activity can be influenced by body fat in adolescent boys. However, both body fat and physical activity were not mediator variables. Perhaps there are other complementary mechanisms that mediate the interrelationships among motor coordination, body fat, and physical activity in adolescent boys.


Assuntos
Tecido Adiposo/fisiopatologia , Exercício/fisiologia , Movimento/fisiologia , Adolescente , Criança , Humanos , Masculino
6.
Res. Biomed. Eng. (Online) ; 34(3): 211-216, July.-Sept. 2018. tab, graf
Artigo em Inglês | LILACS-Express | ID: biblio-984950

RESUMO

Abstract Introduction The aim of this study was to predict 3D ground reaction force signals based on accelerometer data during gait, using a feed-forward neural network (MLP). Methods Seventeen healthy subjects were instructed to walk at a self-selected speed with a 3D accelerometer attached to the distal and anterior part of the shank. A force plate was embedded into the middle of the walkway. MLP neural networks with one hidden layer and three output layers were selected to simulate the anteroposterior (AP), vertical (Vert) and mediolateral (ML) ground reaction forces (GRF). The input layer was composed of fourteen inputs obtained from accelerometer signals, selected based on previous studies. Principal component analysis (PCA) was used to compare the simulated and collected curves. The Pearson correlation coefficient and the mean absolute deviation (MAD) between signals were calculated. Results PCA identified small, but significant differences between collected and simulated signals in the loading response phases of AP and ML GRF, while Vert did not show differences. The correlation between the simulated and collected signals was high (AP: 0.97; Vert: 0.98; ML: 0.80). MAD was 1.8%BW for AP, 4.5%BW for Vert and 1.4%BW for ML. Conclusion This study confirmed that multilayer perceptron neural network can predict the highly non-linear relationship of shank acceleration parameters and ground reaction forces, as well as other studies have done using plantar pressure devices. The greater advantages of this device are the low cost and the possibility of use outside the laboratory environment.

7.
J Orthop ; 15(1): 128-130, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29657455

RESUMO

The purpose of this study was to test the validity of dynamic leg length discrepancy (DLLD) during gait as a radiation-free screening method for measuring anatomic leg length discrepancy (ALLD). Thirty-three subjects with mild leg length discrepancy walked along a walkway and the dynamic leg length discrepancy (DLLD) was calculated using a motion analysis system. Pearson correlation and paired Student t-tests were applied to calculate the correlation and compare the differences between DLLD and ALLD (α = 0.05). The results of our study showed DLLD is not a valid method to predict ALLD in subjects with mild limb discrepancy.

8.
Arch Phys Med Rehabil ; 98(11): 2332-2344, 2017 11.
Artigo em Inglês | MEDLINE | ID: mdl-28751254

RESUMO

OBJECTIVE: To identify the effects of robotic gait training practices in individuals with cerebral palsy. DATA SOURCES: The search was performed in the following electronic databases: PubMed, Embase, Medline (OvidSP), Cochrane Database of Systematic Reviews, Web of Science, Scopus, Compendex, IEEE Xplore, ScienceDirect, Academic Search Premier, and Physiotherapy Evidence Database. STUDY SELECTION: Studies were included if they fulfilled the following criteria: (1) they investigated the effects of robotic gait training, (2) they involved patients with cerebral palsy, and (3) they enrolled patients classified between levels I and IV using the Gross Motor Function Classification System. DATA EXTRACTION: The information was extracted from the selected articles using the descriptive-analytical method. The Critical Review Form for Quantitative Studies was used to quantitate the presence of critical components in the articles. To perform the meta-analysis, the effects of the intervention were quantified by effect size (Cohen d). DATA SYNTHESIS: Of the 133 identified studies, 10 met the inclusion criteria. The meta-analysis showed positive effects on gait speed (.21 [-.09, .51]), endurance (.21 [-.06, .49]), and gross motor function in dimension D (.18 [-.10, .45]) and dimension E (0.12 [-.15, .40]). CONCLUSIONS: The results obtained suggest that this training benefits people with cerebral palsy, specifically by increasing walking speed and endurance and improving gross motor function. For future studies, we suggest investigating device configuration parameters and conducting a large number of randomized controlled trials with larger sample sizes and individuals with homogeneous impairment.


Assuntos
Paralisia Cerebral/reabilitação , Modalidades de Fisioterapia , Robótica , Caminhada , Humanos , Velocidade de Caminhada
9.
J Phys Ther Sci ; 29(2): 356-360, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28265173

RESUMO

[Purpose] This study aimed to develop and validate an assessment tool for Moiré topogram made specifically with the Shadow Moiré technique of the dorsum. [Subjects and Methods] In the analysis of topograms, frontal, sagittal, and transverse planes of individuals' dorsal were considered. Two instructor evaluators analyzed the topograms at different times in the day and on different days. The measurements of intra- and inter- (intra- and interday) reliability were calculated. [Results] Of the three planes analyzed, in all analyses, good (0.61 to 0.80) and/or excellent (0.81 to 1) concordances were observed. [Conclusion] This analysis framework can be recommended to evaluate the topograms obtained with SMT.

10.
Rom J Morphol Embryol ; 58(4): 1201-1216, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29556609

RESUMO

In this study, we investigated the cascade of events involved in the early phases of bone healing in rats, especially the transition from chondrogenesis to osteogenesis, which involves cellular and extracellular matrix (ECM) components. We used a standardized closed tibial fracture model in Wistar rats, which was divided into nine groups of five animals each, and the fracture area was evaluated at 0, 12, 24, 48, 72, 96, 144, 192, and 240 hours post-injury. Histological, histochemical, immunohistochemical and morphometric techniques were used to evaluate the proliferating cell nuclear antigen (PCNA), transforming growth factor-beta (TGF-ß), vascular endothelial growth factor (VEGF), type I procollagen (procoll-I), type I collagen (coll-I), and type II collagen (coll-II) expression at every time point. TGF-ß expression peaked after 144 hours, in the initial chondrogenic phase. VEGF expression reached the first peak at 96-144 hours post-injury, in the initial chondrogenic phase and the second peak at 240 hours, in the osteogenic phase. Except at 48 hours, PCNA expression increased gradually from 12 hours and peaked at 96 hours in the prechondrogenic phase, and then decreased gradually until 240 hours in the osteogenic phase. Total collagen (T-coll) and coll-II reached an expression peak at 144 hours, in the chondrogenic phase. No differences were observed between their expression from 12 hours to 72 hours and at 240 hours post-injury. The results suggest that spatiotemporal expression of ECM components during the chondrogenic and osteogenic phases of bone healing depends on several combined and orchestrated factors. A better understanding of the coordinated participation of cells and ECM components in the early bone healing process may provide new insights into the etiology of abnormal or delayed fracture healing.


Assuntos
Osso e Ossos/patologia , Condrogênese/genética , Matriz Extracelular/química , Osteogênese/genética , Análise Espaço-Temporal , Animais , Humanos , Ratos , Ratos Wistar
11.
Foot (Edinb) ; 28: 42-46, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-27744046

RESUMO

OBJECTIVE: To analyse the subtalar eversion range of motion during walking in women with fibromyalgia. METHOD: Twenty women diagnosed with fibromyalgia were directed to walk barefoot at comfortable and self-paced speed on a 7m walkway. Subtalar eversion range of motion was measured using the difference between the maximum and minimum values of subtalar eversion in stance phase. A range of motion between 4°-6° was considered as reference values for subtalar eversion during gait. Descriptive statistics were performed. RESULTS: In both right and left lower limb analysis of subtalar eversion range of motion, five women showed joint hypomobility, and twelve showed hypermobility. Only one patient performed unaltered subtalar eversion range of motion in both lower limbs. Both joints expressed high variability, and there were no significant differences between the right and left sides. CONCLUSIONS: The findings suggest that biomechanical function of the subtalar joint eversion during the loading response phase of gait in women with fibromyalgia, by excessive rigidity or complacency joint, tends to be impaired. This finding suggests that the indication of walking as an auxiliary strategy in the treatment of women with fibromyalgia should be preceded by thorough examination of the mechanical conditions of the subtalar joint of the patient.


Assuntos
Fibromialgia/fisiopatologia , Marcha/fisiologia , Articulação Talocalcânea/fisiopatologia , Caminhada/fisiologia , Adulto , Fenômenos Biomecânicos/fisiologia , Feminino , Humanos , Amplitude de Movimento Articular/fisiologia
12.
Int J Exerc Sci ; 9(3): 318-326, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27766126

RESUMO

The main aim of this study was to analyze the joint association of body fat percentage and physical activity levels on motor coordination scores in girls with different adiposity status. Sixty-eight school-aged children between 12 and 14 years participated in the study. Skinfold thickness was measured and the Körperkoordinationstest für Kinder test was administered. Participants completed a self-reporting questionnaire on physical activity. Children's adiposity status was attributed in according to age-specific cutoff points of a Brazilian database. Analysis of Variance was used to compare motor coordination scores among groups with different status of adiposity and physical activity. Girls with appropriate body fat percentage performed higher motor coordination scores than girls with excess adiposity, regardless of their physical activity levels (p < 0.05). Additionally, within groups with the same adiposity status, no differences were found in motor coordination scores (p > 0.05). Adiposity status was predominant over physical activity status when joint associations of body fat percentage and physical activity levels on motor coordination scores were analyzed in girls. In addition to metabolic and cardiovascular issues, the acquisition and/or maintenance of appropriate body fat levels in female students should be focused in physical education classes due to its association with motor skills performance.

13.
Pensar prát. (Impr.) ; 19(3): 533-544, jul.-set.2016. Tab
Artigo em Português | LILACS | ID: biblio-913094

RESUMO

O objetivo do estudo foi analisar a relação entre os níveis de coordenação motora, força/resistência muscular e desempenho acadêmico em crianças. A amostra foi composta por 119 escolares com idade entre 12 e 14 anos sem registros de distúrbios de aprendizagem. Os níveis de coordenação, força/resistência muscular e desempenho acadêmico foram estimados utilizando-se, respectivamente, os testes KTK, sit-up e exames governamentais. Os resultados indicaram que os níveis de força/resistência muscular podem influenciar as associações entre coordenação e desempenho acadêmico, assim como os níveis de coordenação podem influenciar as associações entre força/resistência e desempenho acadêmico. As tendências de associações positivas entre as variáveis analisadas sugerem que a prática de atividades físicas nas escolas não deve ser preterida em detrimento do alcance de metas no desempenho acadêmico.


This study aimed to analyze the relationships among motor coordination, physical fitness, and academic achievement among children. The sample consisted of 119 students aged between 12 and 14 years old without medical certificate of learning disabilities. Motor coordination, physical fitness, and academic achievement were estimated through KTK, sit-up, and governmental tests respectively. Results suggest that muscular strength/endurance may influence the associations between coordination and academic achievement, as well as the coordination levels may influence the associations between muscular strength/endurance and academic achievement. The trends of positive associations among these variables suggest that engagement in physical activity should not be discouraged due to goals in academic achievement.


El objetivo de estudio fue analizar la relación entre los niveles de coordinación motora, fuerza/resistencia muscular y rendimiento académico en niños. La muestra se estuvo compuesta por 119 alumnos con edades comprendidas entre 12 y 14 años y sin registros de trastornos de aprendizaje. Los niveles de coordinación, fuerza/resistencia muscular y rendimiento académico fueron estimados usándose, respectivamente, KTK, sit-up, y las pruebas gubernamentales. Los resultados sugieren que los resultados de fuerza/resistencia muscular pueden influenciar las asociaciones entre coordinación y rendimiento académico, así como los niveles de la coordinación y desempeño pueden influenciar las asociaciones entre fuerza/resistencia y rendimiento académico. Las tendencias de las asociaciones positivas entre las variables sugieren que la práctica de actividades físicas en las escuelas no debe ser restringida en detrimiento del logro de los objetivos en el rendimiento académico.


Assuntos
Humanos , Masculino , Feminino , Adolescente , Educação Física e Treinamento , Desempenho Psicomotor , Serviços de Saúde Escolar , Aptidão Física , Desempenho Acadêmico
14.
Acta ortop. bras ; 24(3): 137-141, May-June 2016. Ilus
Artigo em Inglês | LILACS | ID: lil-781999

RESUMO

OBJECTIVE: To compare the activation of the vastus lateralis (VL) and biceps femoris (BF) muscles during gait, as well VL/BF muscular co-contraction (MCC) between healthy (CG) and anterior cruciate ligament reconstructed (ACL-R) subjects. METHODS: Nineteen subjects, ten controls and nine ACL-R patients had a VL and BF electromyogram (EMG) captured to calculate the MCC ratio. A Principal Component (PC) Analysis was applied to reduce the dimensionality effect of each of the MCC, VL and BF curves for both healthy and ACL reconstructed groups. The PC scores were used to calculate the standard distance (SD). SD values were employed in order to compare each dependent variable (MCC, VL and BF) between the two groups using unpaired t-test. RESULTS: ACL-R group presented a lower VL activation at the beginning and at the end of the gait cycle, as compared to the control group. However, no difference was found for BF or VL/BF MCC. CONCLUSION: The gait analysis of ACL reconstructed patients demonstrated a persistent deficit in VL activation when compared to the control group, even one year after surgery. Level of Evidence III. Case Control Study


Assuntos
Humanos , Osteoartrite , Eletromiografia , Marcha , Articulação do Joelho
15.
Acta Ortop Bras ; 24(3): 137-41, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27217814

RESUMO

OBJECTIVE: To compare the activation of the vastus lateralis (VL) and biceps femoris (BF) muscles during gait, as well VL/BF muscular co-contraction (MCC) between healthy (CG) and anterior cruciate ligament reconstructed (ACL-R) subjects. METHODS: Nineteen subjects, ten controls and nine ACL-R patients had a VL and BF electromyogram (EMG) captured to calculate the MCC ratio. A Principal Component (PC) Analysis was applied to reduce the dimensionality effect of each of the MCC, VL and BF curves for both healthy and ACL reconstructed groups. The PC scores were used to calculate the standard distance (SD). SD values were employed in order to compare each dependent variable (MCC, VL and BF) between the two groups using unpaired t-test. RESULTS: ACL-R group presented a lower VL activation at the beginning and at the end of the gait cycle, as compared to the control group. However, no difference was found for BF or VL/BF MCC. CONCLUSION: The gait analysis of ACL reconstructed patients demonstrated a persistent deficit in VL activation when compared to the control group, even one year after surgery. Level of Evidence III. Case Control Study.

16.
Acta ortop. bras ; 24(2): 73-76, Mar.-Apr. 2016. tab, graf
Artigo em Inglês | LILACS | ID: lil-775076

RESUMO

Objetivo: Comparar os parâmetros espaço temporais da marcha de sujeitos hígidos e pacientes submetidos à reconstrução do LCA, classificando o status de normalidade. Método: Quatorze sujeitos hígidos e oito com reconstrução do LCA há aproximadamente um ano caminharam enquanto o movimento era capturado por um sistema de câmeras infravermelhas. Os instantes de contato inicial e retirada do pé do solo foram determinados e as seguintes variáveis dependentes, as quais foram comparadas entre os grupos por meio do teste Mann-Whitney(α=0,05), foram calculadas: percentual de tempo no apoio duplo inicial, percentual de tempo no apoio simples, percentual de tempo no apoio duplo terminal, comprimento da passada e velocidade da marcha. Inicialmente, foi aplicada uma regressão logística a todas as variáveis dependentes para determinar os sujeitos hígidos e aqueles com reconstrução do LCA. Resultados: Os dois grupos não apresentaram diferenças em nenhum parâmetro espaço temporal da marcha(p > 0,05), apesar da cinemática angular do joelho permanecer alterada,como evidenciado por um estudo anterior com a amostra similar.Conclusão: A regressão classificou todos os sujeitos como hígidos,inclusive aqueles do grupo com reconstrução do LCA, sugerindo que as variáveis espaço temporais aplicadas nesse estudo não devem ser usadas como critério isolado de retorno incondicional às atividades esportivas. Nível de Evidência III, Estudo de Caso Controle.


Objective: To compare gait spatiotemporal parameters of healthyand ACL reconstructed subjects in order to classify the status of gaitnormality. Methods: Fourteen healthy subjects and eight patientssubmitted to ACL reconstruction walked along a walkway while thelower limbs movement was captured by an infrared camera system.The frames where the initial contact and toe-off took place were determinedand the following dependent variables, which were comparedbetween groups through the Mann-Whitney test (α=0.05) were calculated:percentage of time in initial double stance, percentage of timein single stance, percentage of time in terminal double stance, stridelength and gait velocity. Initially, all variables were compared betweengroups using a Mann-Whitney test. A logistic regression was applied,including all dependent variables, to create a model that could differentiatehealthy and ACL reconstructed subjects. Results: ACLreconstructed group showed no differences in any spatiotemporalparameter of gait (p > 0.05) in relation to the control group, althoughthe angular kinematic differences of the knee remained altered, asevidenced in a study with a similar sample. Conclusion: The regressionclassified all subjects as healthy, including the ACL reconstructedgroup, suggesting the spatiotemporal variables should not be usedas the sole criterion of return to sports activities at the same level asprior to injury. Level of Evidence III, Case Control Study.


Assuntos
Humanos , Antropometria , Marcha , Joelho , Ligamento Cruzado Anterior/lesões , Esportes , Ferimentos e Lesões
17.
Acta Ortop Bras ; 24(2): 73-6, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26981039

RESUMO

OBJECTIVE: : To compare gait spatiotemporal parameters of healthy and ACL reconstructed subjects in order to classify the status of gait normality. METHODS: : Fourteen healthy subjects and eight patients submitted to ACL reconstruction walked along a walkway while the lower limbs movement was captured by an infrared camera system. The frames where the initial contact and toe-off took place were determined and the following dependent variables, which were compared between groups through the Mann-Whitney test (a=0.05) were calculated: percentage of time in initial double stance, percentage of time in single stance, percentage of time in terminal double stance, stride length and gait velocity. Initially, all variables were compared between groups using a Mann-Whitney test. A logistic regression was applied, including all dependent variables, to create a model that could differentiate healthy and ACL reconstructed subjects. RESULTS: : ACL reconstructed group showed no differences in any spatiotemporal parameter of gait (p > 0.05) in relation to the control group, although the angular kinematic differences of the knee remained altered, as evidenced in a study with a similar sample. CONCLUSION: : The regression classified all subjects as healthy, including the ACL reconstructed group, suggesting the spatiotemporal variables should not be used as the sole criterion of return to sports activities at the same level as prior to injury. Level of Evidence III, Case Control Study.

18.
Rev. bras. crescimento desenvolv. hum ; 26(3): 380-384, 2016. tab
Artigo em Inglês | LILACS | ID: biblio-843514

RESUMO

INTRODUCTION: While evidence suggests that the levels of motor coordination and body mass index (BMI) are negatively correlated, little is known about the influence of levels of physical activity on associations between these variables among adolescents OBJECTIVE: To analyse the relationships between levels of motor coordination and BMI in normal weight and overweight/obese adolescents, controlling for physical activity levels METHODS: Fifty-six students (50% overweight/obese adolescents), aged 12-14 years old, participated in this study. The Physical Activity Questionnaire for Older Children and the Körperkoordinationstest für Kinder were used in order to assess the levels of physical activity and motor coordination, respectively. Bivariate and partial correlations were used to analyse the interrelationships among motor coordination, BMI and physical activity. The analysis of covariance test was used in order to compare the levels of motor coordination between normal weight and overweight/obeses adolescents, considering the physical activity level as a covariate RESULTS: Weak to moderate negative correlations (p < 0.05) were found between motor coordination and BMI in the sample as a whole, normal weight and overweight/obese groups. However, when controlled for physical activity levels. no significant correlation was observed in the normal weight group. Further, overweight/obese adolescents showed lower levels of motor coordination than their normal weight peers CONCLUSION: Physical activity levels influence the association between levels of motor coordination and BMI in normal weight adolescents, but not in their overweight/obese peers


INTRODUÇÃO: Enquanto evidências sugerem que níveis de coordenação motora e de índice de massa corporal (IMC) estão negativamente correlacionados, pouco se sabe sobre a influência dos níveis de atividade física na associação entre essas variáveis em adolescentes OBJETIVO: Analisar as associações entre os níveis de coordenação motora e o IMC em adolescentes com peso saudável e com sobrepeso/obesos, controlando pelos níveis de atividade física MÉTODO: Cinquenta e seis escolares (50% adolescentes com sobrepeso/obesos), entre 12 e 14 anos, participaram do estudo. Os instrumentos Physical Activity Questionnaire for Older Children e o Körperkoordinationstest für Kinder foram usados para avaliar os níveis de atividade física e de coordenação motora, respectivamente. Correlações bivariadas e parciais foram usadas para analisar o inter-relacionamento entre os níveis de coordenação motora, IMC e atividade física. O teste de Análise de Covariância foi utilizado para comparar os níveis de coordenação entre adolescentes com peso saudável e com sobrepeso/obesos, considerando o nível de atividade física como covariável RESULTADOS: Foram encontradas correlações significativamente negativas (p < 0,05), de fraca a moderada, entre IMC e níveis de coordenação no grupo como um todo, nos grupos com peso saudável e com sobrepeso/obesos. No entanto, quando controladas pelos níveis de atividade física, não foram observadas correlações significativas no grupo com peso saudável. Ademais, adolescentes com sobrepeso/obesos apresentaram menores níveis de coordenação motora que adolescentes com peso saudável CONCLUSÃO: Os níveis de atividade física influenciam a associação entre os níveis de coordenação motora e IMC em adolescentes com peso saudável, mas não em adolescentes com sobrepeso/obesos


Assuntos
Humanos , Masculino , Feminino , Adolescente , Peso Corporal , Desenvolvimento Infantil , Exercício , Desenvolvimento Humano , Obesidade , Sobrepeso , Desempenho Psicomotor , Índice de Massa Corporal
19.
Rev. bras. geriatr. gerontol ; 18(4): 735-742, Oct.-Dec. 2015. tab, graf
Artigo em Português | LILACS-Express | ID: lil-770475

RESUMO

Objective : The aim of this study was to determine the effects of a physical activity program on static balance in elderly women. Method : The sample was randomly subdivided into an experimental group (EG; n=28; 65.64±2.36 years; BMI= 27.52±3.13) and a control group (CG; n=21; 66.84±2.31 years; BMI= 27.67±2.78). The EG participated in twice-weekly 60-minute sessions of physical activity for 12 weeks, with a perceived intensity level between 3 and 5 (CR10 scale). Static balance was evaluated using a baropodometric platform. Mean postural amplitude oscillations were measured in displacement from the center of pressure (COP), left lateral (LLD), right lateral (RLD), anterior (AD) posterior (PD) and elliptical (EA) area. Results : Repeated-measures analysis of variance showed a significant decrease in EG pre and post-test oscillations (p<0.05) in the COP, AD (∆=0.59;p=0.021), PD (∆=-0.91; p=0.001) and EA (∆=1.56; p=0.044) displacement. When comparing the groups, post-test amplitude oscillations in the COP, RLD (∆%=-7.40;p=0.006), AD (∆%=-30.63; p=0.007), PD (∆%=-42.96; p<0.001) and EA (∆%=-34.41;p=0.017) of the EG were significantly lower (p<0.05) than those of the CG. There were no significant LLD alterations. Conclusion : The results confirm that static balance improved with physical exercise in EG subjects.


Objetivo : Determinar os efeitos de um programa de atividades físicas sobre o equilíbrio estático em mulheres idosas. Método : Estudo experimental utilizando amostra dividida aleatoriamente em grupo experimental (GE; n=28; 65,64±2,36 anos; IMC=27,52±3,13) e grupo controle (GC; n=21; 66,84±2,31 anos; IMC= 27,67±2,78). O GE participou do programa de atividades físicas por 12 semanas (2x/sem; 60 minutos/sessão), com intensidade de esforço percebido entre 3 e 5 (Escala de Borg-CR10). O equilíbrio estático foi avaliado através de uma plataforma baropodométrica. As médias das amplitudes das oscilações posturais foram medidas através do deslocamento do centro de pressão (COP) lateral esquerdo (DLE), lateral direito (DLD), anterior (DA), posterior (DP) e da área elíptica (AE). Resultados : A análise de variância com medidas repetidas mostrou redução significativa nas oscilações do deslocamento do COP do pré para o pós-teste (p<0,05) no GE no DA (∆=0,59;p=0,021), DP (∆=-0,91; p=0,001) e na AE (∆=1,56; p=0,044). As oscilações das amplitudes do deslocamento do COP no GE foram significativamente menores (p<0,05) no DLD (∆%=-7,40;p=0,006), DA (∆%=-30,63; p=0,007), DP (∆%=-42,96; p<0,001) e na AE (∆%=-34,41;p=0,017) quando comparadas ao GC no pós-teste. Não houve alterações significativas no deslocamento lateral esquerdo (DLE). Conclusão : Os resultados mostraram que o equilíbrio estático no GE melhorou com a participação no programa de atividades físicas.

20.
Conf Proc IEEE Eng Med Biol Soc ; 2015: 2812-5, 2015 08.
Artigo em Inglês | MEDLINE | ID: mdl-26736876

RESUMO

The aim of the study was to analyze and compare the residuals obtained from ground reaction force (GRF) models developed using two different neural network configurations (one network with three outputs; and three networks with one output each), based on accelerometer data. Seventeen healthy subjects walked along a walkway, with a force plate embedded, with a three dimensional accelerometer attached to the shank. Multilayer perceptron networks (MLP) models were developed with the 3D accelerometer data as inputs to predict the GRF. The residuals of these models were evaluated graphically and numerically to verify the fitting. A visual analysis of the simulated signals suggests the model was able to adequately predict the GRF. The errors and correlations found in the MLP models for the 3D GRF is at least similar to other studies, although some of them showed higher errors. There was not difference between the two MLP configurations. However, despite the high correlation coefficient and closeness to a normal probability distribution, the residual analysis still presented a higher kurtosis and skewness, suggesting that the inclusion of other variables and the increase of the validation sample size could increase the fitting of the simulation.


Assuntos
Marcha , Fenômenos Biomecânicos , Humanos , Fenômenos Mecânicos , Caminhada
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