Resumo Introdução: O exercício físico regular promove o alívio da dor, reduzindo a facilitação central dos mecanismos álgicos. Objetivo: Avaliar o efeito de diferentes frequências de exercício físico (uma, duas ou três vezes por semana) em diferentes modalidades (treinamento aeróbico, treinamento de alongamento e treinamento de força), na dor na articulação do joelho e no nível de independência em pessoas com osteoartrite de joelho. Métodos: Este artigo é um estudo transversal e utilizou o STROBE-Checklist: estudos transversais. Foram avaliados 193 idosos. Foram analisadas dor e independência funcional. Resultados: Para a variável dor, houve diferença estatística a favor da intervenção nas comparações controle versus força 1 e 2 vezes por semana e alongamento 3 vezes por semana, já na variável Lawton, apenas a comparação controle versus aeróbico 1 vez por semana não se mostrou estatisticamente diferente. Conclusão: A modalidade de exercício e a frequência semanal parecem afetar a percepção da dor, exercícios de alongamento realizados três vezes por semana, bem como exercícios de fortalecimento muscular, independente da frequência semanal são eficientes na analgesia da dor articular. A prática de exercícios de força muscular, independente da frequência semanal e exercícios aeróbicos e de alongamento pelo menos duas vezes por semana, aumenta e/ou mantém as AIVD. Nível de Evidência II; Estudos Transversais.

Abstract Background: Regular physical exercise promotes pain relief, reducing the central facilitation of pain mechanisms. Objective: Evaluate the effect of different frequencies of physical exercise (once, twice, or three times a week) on different modalities (aerobic training, stretching training, and strength training), on the pain in the knee joint, and on the level of independence on people with knee osteoarthritis. Methods: Is cross-sectional and used the STROBE-Checklist: cross-sectional studies. A total of 193 elderly people were evaluated, pain and functional independence were analyzed. Results: For the pain variable, there was a statistical difference in favor of the intervention in the comparisons control versus strength 1 and 2 times a week and stretching 3 times a week already in the Lawton variable, only the comparison control versus aerobic 1 time a week did not prove to be statistically dignified. Conclusion: The exercise modality and the weekly frequency seem to affect the perception of pain, stretching exercises performed three times a week, as well as muscle strengthening exercises, regardless of weekly frequency are efficient in joint pain analgesia. Practicing muscle strength exercises, regardless of weekly frequency and aerobic and stretching exercises at least twice a week, increases and/or maintains IADL. Level of Evidence II; Cross-sectional Study.

Abstract Context: Vehicle driving depends on the integration of motor, visual, and cognitive skills to respond appropriately to different situations that occur in traffic. Objectives: To analyze a model of performance predictor for braking time in the driving simulator, using a battery of tests divided by gender. Methods: Selected were 100 male drivers with a mean age of 72.6 ± 5.7 years. Sociode-mographic variables, braking time in the driving simulator, and motor, visual, and cognitive skills were evaluated. Results: Comparing genders, men were older than women (p = 0.002) and had longer driving times (p = 0.001). Men had more strength in hand grip (p ≤ 0.001). In the linear regression analysis, the model explained 68 % of the braking time in men and 50.8 % in women. In the stepwise multiple linear regression analysis, the variable that remained in the model was the strength of the right plantar flexors, which explained 13 % of the braking time in women and men, and the cognitive variables explained 38.9 %. Conclusion: Sociodemographic, motor, visual, and cognitive variables, explained a substantial portion of the variability in braking time for both older women and men, the specific variables driving this performance differed between the sexes. For older women, factors such as muscle strength emerged as critical determinants of braking ability, highlighting the importance of physical health in maintaining driving skills. On the other hand, cognitive conditions emerged as the primary predictor of braking performance in older men, underscoring the role of mental acuity and decision-making processes in safe driving.

ABSTRACT Objective: Evaluate and correlate the sagittal balance parameters with the postural of the pelvis and lumbar spine. Methods: 80 individuals of both sexes, aged between 20 and 35 years, were evaluated. Biophotogrammetry was done with the SAPO software program. Measurements of the sagittal balance parameters were obtained by analyzing a lateral view panoramic radiography of the vertebral column, in which the anatomical points of reference were digitally marked. The calculation of the angles was done automatically by the Keops program. Results: In Keops assessment, 17.5% of the sample had high pelvic incidence angles (> 60°), 31.5% had low pelvic incidence angles (< 45°), and 51.2% had medium pelvic incidence angles (between 46° and 59°). SAPO showed 12,5% lordosis, 40% retroversion, and 47,5% normal curvature. In the right lateral view, pelvic incidence angle had a moderate and positive correlation with vertical alignment of the trunk and with vertical alignment of the body, and a negative and moderate correlation with horizontal alignment of the pelvis. Conclusion: Differences were found between vertical alignment measurements from the postural evaluation system (SAPO). A positive correlation was found between PI from Keops and pelvic anteversion from SAPO. Level of Evidence II; Prospective Study.

RESUMO Objetivo: Avaliar e correlacionar o equilíbrio sagital com parâmetros posturais da pelve e coluna lombar Métodos: Foram avaliados 80 indivíduos de ambos os sexos, com idade entre 20 e 35 anos. A biofotogrametria foi realizada com o software SAPO. As medidas dos parâmetros do equilíbrio sagital foram obtidas pela análise de uma radiografia panorâmica em perfil da coluna vertebral, na qual os pontos anatômicos de referência foram marcados digitalmente. O cálculo dos ângulos foi feito automaticamente pelo programa Keops. Resultados: Na avaliação Keops, 17,5% da amostra apresentavam ângulos de incidência pélvicos altos (> 60°), 31,5% tinham ângulos de incidência pélvicos baixos (< 45°) e 51,2% apresentavam ângulos de incidência pélvicos médios (entre 46° e 59°). O SAPO apresentou 12,5% de lordose, 40% de retroversão e 47,5% de curvatura normal. Na vista lateral direita, o ângulo de incidência da pelve apresentou correlação moderada e positiva com o alinhamento vertical do tronco e com o alinhamento vertical do corpo e negativa e moderada com o alinhamento horizontal da pelve. Conclusão: Foram encontradas diferenças entre as medidas de alinhamento vertical do sistema de avaliação postural (SAPO). Uma correlação positiva foi encontrada entre IP de Keops e anteversão pélvica de SAPO. Nível de Evidência II; Estudo Prospectivo.

Abstract Introduction Advanced Glycation End-Products (AGEs) are a diverse group of highly reactive molecules that play a vital role in the development of neurodegenerative disorders, such as Parkinson's Disease (PD), leading to a decline in functional and cognitive capacity. The objective of this study was to assess the intake and quantification of AGEs in individuals with PD and to correlate them with their functional and cognitive abilities. Methods This was a cross-sectional study involving 20 PD patients and 20 non-PD individuals as the Control group (C). The autofluorescence reader was used to evaluate skin AGEs, while food recall was used to quantify AGEs consumed for three different days. The Montreal Cognitive Assessment, Short Physical Performance Battery, and handgrip tests were used. PD patients demonstrated greater impairment in functional capacity compared to the control group. Results Dominant Handgrip (p = 0.02) and motor performance, in the sit and stand test (p = 0.01) and Short Physical Performance Battery (SPPB) (p = 0.01) were inferior in PD patients than the control group. Although PD patients tended to consume less AGEs than the control group, AGE intake was negatively correlated with handgrip strength in individuals with PD (r = -0.59; p < 0.05). Conclusion PD patients had lower strength and functional capacity, suggesting that the effects of AGEs might be exacerbated during chronic diseases like Parkinson's.

Abstract Introduction An accurate assessment of balance problems is critical for decreasing the risk of falling in patients with Parkinson's Disease (PD). Reliable diagnostic tools such as Computerized Dynamic Posturography (CDP) are not feasible for the clinical setting. Therefore, the present study's aim was to assess the correlation between the clinical Balance Evaluation Systems Test (BESTest) and CDP. Methods 20 male older adults with Parkinson's Disease (PD) were included in this study. Participants first executed the Sit-To-Stand (STS), Step/Quick turn (SQT), and Step Up and Over (SUO) tests on a Balance Master® force platform, followed by a clinical balance evaluation using the BESTest. Results Four outcomes of the CDP were negatively correlated with one or more BESTest domains or total BESTest score: STS sway velocity was negatively correlated with the anticipatory postural adjustment (p = 0.02) and sensory orientation (p = 0.01) domains. SQT turn time was negatively correlated with biomechanical restriction (for turns to the left, p = 0.01, and right, p = 0.03, respectively), postural response (p = 0.01, p = 0.01), dynamic balance during gait (p = 0.007, p = 0.001), and total score (p = 0.02, p = 0.01). Step over time to the right in SUP was negatively correlated with the limits of the stability domain (p = 0.002) and total BESTest score (p = 0.020). SUO impact index was negatively correlated with the anticipatory postural adjustment domain (p = 0.01). Conclusion This study shows that several BESTest domains are significantly correlated with CDP outcomes, demonstrating that the BESTest can be used as a more clinically feasible alternative for computerized posturography, without loss of information.

ABSTRACT Objective: After deep brain stimulation (DBS), patients with Parkinson’s disease (PD) typically still present significant gait and postural stability problems, and thus additional interventions are needed. In this way, our purpose was evaluate the comparative effectiveness of treadmill training, with and without body weight support, on balance outcomes among patients with PD after DBS. Methods: Eleven patients with PD that were using bilateral subthalamic nucleus DBS were evaluated using Time Up and Go test (TUG); Berg Balance Scale (BBS) and Static Posturography. In phase 1, all subjects participated in 8-weeks of treadmill training in conjunction with conventional physiotherapy. After six weeks (wash-out), each patient then participated in a subsequent 8-weeks of treadmill training with partial body weight support. Results: After the phase 1, there were improvements on the cognitive TUG performance (Before: 15.7 ± 1,8 sec; After: 13.7 ± 3.1 sec; p < 0.01) and an increase of anteroposterior and medio-lateral body oscillation with eyes closed. After the phase 2, there were improvements in conventional (Before: 12.3 ± 2.0 sec; After: 10.7 ± 1.7 sec; p < 0.01) and cognitive (Before: 14.6 ± 3.5 sec; After: 12.5 ± 1.6 sec; p < 0.05) TUG performances. There were no significant changes in the Berg Balance Scale following either training protocol. Conclusion: Both trainings improved static and dynamic balance and had similar results; however, supported treadmill training seemed to be a potentially superior option, as patients tended to feel safer. Level of Evidence II, therapeutic studies - investigation of treatment outcomes.

RESUMO Objetivo: Mesmo após a estimulação cerebral profunda (ECP), os pacientes com doença de Parkinson (DP) muitas vezes ainda apresentam problemas significativos de marcha e estabilidade postural, e, portanto, intervenções adicionais são necessárias. Avaliar a eficácia comparativa do treinamento em esteira, com e sem suporte de peso corporal, nos resultados de equilíbrio de pacientes com DP após ECP. Métodos: Onze pacientes com DP em uso de ECP bilateral do núcleo subtalâmico foram avaliados pelos testes Time Up and Go (TUG), escala de equilíbrio de Berg (EEB) e posturografia estática. Na fase 1, todos participaram de oito semanas de treinamento em esteira em conjunto com fisioterapia convencional. Após seis semanas (wash-out), cada paciente participou de oito semanas subsequentes de treinamento em esteira com suporte parcial de peso corporal. Resultados: Depois da fase 1, houve melhora no desempenho cognitivo do TUG (antes: 15,7 ± 1,8 s; depois: 13,7 ± 3,1 s; p < 0,01) e aumento da oscilação anteroposterior e médio-lateral do corpo com os olhos fechados. Após a fase 2, os resultados do TUG convencional (antes: 12,3 ± 2,0 seg; depois: 10,7 ± 1,7 seg; p < 0,01) e cognitivo (antes: 14,6 ± 3,5 s; depois: 12,5 ± 1,6 s; p < 0,05) demonstraram melhora. Os protocolos de treinamento não causaram mudanças significativas na EEB.. Conclusão: Ambos os treinos melhoraram o equilíbrio estático e dinâmico e tiveram resultados semelhantes; no entanto, o treinamento em esteira com suporte é uma opção potencialmente superior, uma vez que os pacientes tendiam a se sentir mais seguros. Nível de Evidência II, estudos terapêuticos - investigação de resultados de tratamento.

Abstract Background Acknowledging the relationship between postural control and muscle strength in lower limbs is important to find persons with high fall risk and to design fall prevention exercise programs. Objective To investigate the connection between knee muscle strength, semi-static postural balance, and functional mobility in irregularly active older women. Methods One hundred and ten older women aged 60 to 85 years underwent a semi-static postural balance test in a force and functional mobility measured by Timed Up & Go (TUG) with and without Cognitive Tasks (CT). Muscle strength of the knee was assessed by isokinetic dynamometry at 60°/s. Results A negative correlation between the functional mobility (TUG with and without CT) and the muscular strength of the knee was observed. Regarding semi-static balance, there was a low negative correlation with peak torque corrected for body weight of the extensors with the following variables with eyes open: Mean Velocity Dominant limb (D) (r = -0.19; p = 0.03); and anteroposterior range Non-Dominant limb (ND) (r = -0.19; p = 0.04); with eyes closed: mediolateral range ND limb (r = -0.21; p = 0.02) and Mean Velocity ND limb (r = -0.18; p = 0.05). Conclusions This study found that better functional mobility was associated with greater muscle strength in the knee in elderly women. There were weak negative correlations between knee extensor strength and some measures of semi-static postural balance, suggesting that different motor control actions are required to maintain semi-static balance and mobility. In the case of semi-static balance, a lower level of muscle response is required than in functional mobility.

Abstract Context: Transtibial Amputation (TA) predisposes to a sedentary lifestyle. Objectives: To evaluate the efficiency of a short-term (8-week) Concurrent Training (CT) program in Unilateral Transtibial Amputees (UTA) and to compare it with the physical condition of a group of Paralympic athletes in preparation for the Rio de Janeiro Paralympics. Design: This was a longitudinal, prospective and controlled trial study. Methods: Thirty-four male subjects with UTA and using prostheses for six months or more were selected for this study. They were divided into two groups: Group 1 (G1) – 17 non-athlete and untrained UTA and Group 2 (G2) – 17 paralympic athletes with active UTA in the training phase. G1 was evaluated before and after eight weeks of CT and G2 made a single evaluation for control. All were submitted to anamnesis, clinical evaluation (blood pressure, electrocardiogram, and heart rate) and cardiopulmonary exercise testing on a lower limb cycle ergometer, and isokinetic knee dynamometry. The CT of G1 included resistance exercise and aerobic interval training on a stationary bicycle and G2 followed the training of the Paralympic teams. Results: Patients were retested by the same methods after CT. The two most important central dependent variables (maximal oxygen uptake and muscular strength) increased by 22% and knee extensor and flexor strength by 106% and 97%, respectively. Conclusion: After eight weeks of CT, there was an improvement in general functional condition, muscle strength, and cardiorespiratory performance improving protection against chronic diseases and quality of life. Context TA (TA lifestyle Objectives shortterm short term 8week week 8 (8-week (CT (UTA Paralympics Design longitudinal study Methods Thirtyfour Thirty four groups G (G1 nonathlete non athlete (G2 phase control anamnesis blood pressure electrocardiogram rate ergometer dynamometry teams Results maximal 22 106 97 97% respectively Conclusion life (G 10 9

Abstract Context: Many studies show the importance of evaluating the adaptation time of subjects in a virtual driving environment, looking forwards to a response as closest as a possible real vehicle. Objectives: This study aimed to identify and analyze the adaptation to the driving simulator in older adults and middle-aged adults with and without a distraction, and a secondary aim was to identify predictors of safe performance for older adults’ drives. Design: Male and female middle-aged adults (n = 62, age = 30.3 ± 7.1 years) and older adults (n = 102, age = 70.4 ± 5.8 years) were evaluated for braking time performance in a driving simulator; cognition performance assessment included the Mini-Mental State Examination; motor evaluation included ankle flexor muscle strength with the isokinetic dynamometer and handgrip strength; the postural balance was evaluated with Timed Up and Go test, with and without a cognitive distraction task. Results: Older adults (men and women) and middle-aged adult women require more time to adapt to the driving simulator. The distractor increases the adaptation time for all groups. The main predictors of braking time for older women are age, muscle strength, and postural balance associated with distraction, and for older men, muscle strength. Conclusions: Age, sex, and distractor interfere in the adaptation of the virtual task of driving in a simulator. The evaluation model developed with multi-domains demonstrated the ability to predict which skills are related to braking time with and without the presence of the distractor. Context environment vehicle Objectives middleaged middle aged drives Design n 62 303 30 3 30. 71 7 1 7. years 102 704 70 4 70. 58 5 8 5. MiniMental Mini Mental Examination test Results men groups Conclusions Age sex multidomains multi domains 6 10

ABSTRACT The study aims to evaluate the perception of health, quality of life and functional capacity during six months after COVID-19-related hospitalization. This is a prospective longitudinal study carried out at Universidade São Judas Tadeu (USJT) in partnership with the Instituto Ânima Brasil. Thirteen adult participants, including young and older adults, were evaluated, had a confirmed diagnosis of COVID-19 and were hospitalized. A characterization and interdisciplinary questionnaire built by the researchers was used to assess health perception, quality of life, and functional capacity of participants. In this study, participants were followed for a 6-month period and the main results obtained were: the identification of a significant increase in walking time after three months (p=0.002) as well as an improvement in the perception of quality of life (p=0.002). In addition, the levels of tiredness and physical activity were evaluated; the mean responses were “little tired” and “irregularly active,” respectively, and remained unchanged over six months. Considering that patients who were hospitalized due to COVID-19 showed a reduction in the perception of quality of life and walking time soon after the hospital period, it was identified that over time they tend to improve these perceptions.

RESUMO O objetivo do estudo foi avaliar a percepção de saúde, a qualidade de vida e a capacidade funcional dos pacientes durante seis meses após a internação por COVID-19. Trata-se de um estudo de delineamento prospectivo longitudinal realizado na Universidade São Judas Tadeu (USJT) em parceria com o Instituto Ânima Brasil. Foram avaliados 13 participantes adultos, entre jovens e idosos, que apresentaram diagnóstico confirmado de COVID-19 e foram internados. Foi utilizado um questionário de caracterização e interdisciplinar construído especificamente para inquirir a percepção de saúde, a qualidade de vida e a capacidade funcional dos participantes. Neste estudo, eles foram acompanhados no período de seis meses, e os principais resultados obtidos foram: a identificação do aumento significativo no tempo de caminhada após três meses (p=0,002), bem como a melhora na percepção de qualidade de vida (p=0,002). Além disso, foram avaliados os níveis de cansaço e de prática de atividade física, e as respostas médias foram, respectivamente, “pouco cansaço” e “irregularmente ativo”, as quais se mantiveram inalteradas ao longo de seis meses. Tendo em vista que os pacientes que foram submetidos à internação hospitalar devido à COVID-19 apresentaram redução da percepção de qualidade de vida e do tempo de caminhada logo após o período hospitalar, foi identificado que, com o decorrer do tempo, eles demonstraram tendência de melhora dessas percepções.

RESUMEN El objetivo de este estudio fue evaluar la percepción de salud, calidad de vida y capacidad funcional durante seis meses posteriores a la hospitalización por COVID-19. Se trata de un estudio prospectivo longitudinal, realizado en la Universidade São Judas Tadeu (USJT) y el Instituto Ânima Brasil. Se evaluaron a trece participantes, entre adultos jóvenes y adultos mayores, que tenían diagnóstico confirmado del COVID-19 y se encontraban hospitalizados por complicaciones de esa enfermedad. Se utilizó un cuestionario de caracterización e interdisciplinario elaborado por los investigadores para evaluar la percepción de salud, la calidad de vida y la capacidad funcional de los participantes. En este estudio se realizó seguimiento de los participantes durante un período de seis meses, y los principales resultados fueron: un significativo aumento en el tiempo de caminata después de tres meses (p=0,002), así como una mejora en la percepción de la calidad de vida (p=0,002). Además, se evaluaron los niveles de cansancio y de actividad física, y las respuestas medias fueron “poco cansado” e “irregularmente activo”, las cuales se mantuvieron sin cambios durante seis meses. Considerando que los pacientes que fueron hospitalizados por COVID-19 presentaron una reducción en la percepción de calidad de vida y en el tiempo de marcha tras el período en el hospital, se identificó que con el tiempo tienden a mejorar estas percepciones.

Abstract Context In the elderly, weak lower limb muscles impair functional tasks' performance. Objective To evaluate the healthy elderly's ankle dorsiflexion and plantarflexion maximum torque and its variability in two sets of 5 RM isokinetics evaluation. Method 50 women (68.0 ± 4.6 years old) and 50 men (72.7 ± 8.5 years old) did two sets of ankle plantar flexor and dorsiflexor isokinetic tests at 30°/s. Peak torque, total work, and coefficient of variation were analyzed. Results Men did the strongest plantarflexion torque (p < 0.05) and dorsiflexion torque (p < 0.05); their highest peak torque occurred at set 2 (p < 0.05), while the largest plantarflexion torque variability (p < 0.05), dorsiflexion torque variability (p < 0.05), and the largest plantarflexion torque variability occurred at set 1 (p < 0.05). Men did the highest plantarflexion and dorsiflexion total work (p < 0.05) at set 2 (p < 0.05). Conclusion Older men are stronger than older women. The torque variability, in men, was higher during the first set, suggesting an adaptation to the isokinetics evaluation. Clinicians and researchers should consider that different muscles might need different numbers of sets and trials to measure their maximal muscle strength.

Abstract Context: Anterior Cruciate Ligament (ACL) injury is disabling in several sports because it causes knee instability and functional deficit. Usually, surgical treatments produce the best functional outcomes, however, sometimes they are not always able to fully restore stability and function. Objective: The objective of this study was to evaluate postural balance, muscle strength, and functional performance of young athletes with an ACL injury before and after ACL reconstruction. Design: This was a longitudinal observational prospective study. Method: 74 athletes, 60 men, and 14 women, aged between 16 and 45, divided into two groups: the Group-Lesion of ACL with 34 athletes (24.1 years) and the Group-Control with 40 athletes without ACL lesion (27.7 years old). All volunteers performed posturography, isokinetic dynamometry, and the Hop-Test. The ACL-Group was evaluated before and 12 months after the reconstruction and the control group was evaluated once. Results: The Postoperative ACL Group presented greater limb symmetry, 0.96 (± 0.12), than the preoperative ACL Group, 0.87 (± 0.17), p < 0.01 in the Hop-Test. In the posturography, the displacement area was smaller in the postoperative ACL Group, 19.85 (± 5.74), compared to the preoperative ACL Group, 24.20 (± 8.97), p < 0.01. In isokinetic dynamometry the torque peak was greater in the postoperative ACL Group, 0.91 (± 0.14), than in the preoperative ACL Group, 0.74 (± 0.15), p < 0.01. Conclusion: The functional outcomes increased in ACL reconstruction athletes after 12 months, but not at the same level as in the Control Group. The result indicates an incomplete functional recovery, adaptive changes in postural control after injury, reconstruction, and return to sport.

Abstract Context Aging causes a progressive worsening in postural balance, affecting functional independence and increasing the risk of falls. Objective The aim of the study was to evaluate the effect of aging on the static balance in women from 50-years to 89-years of age. Design This was a cross-sectional study, with 400 irregularly active women were evaluated and grouped by age: Group 6thdecade (age 50 to 59) ‒ 58 participants; Group 7thdecade (age 60 to 69) ‒ 214 participants; Group 8thdecade (age 70 to 79) ‒ 92 participants; Group 9thdecade (age 80 to 89) ‒ 36 participants. Postural balance was evaluated using a portable force platform in a standard standing position, with Eyes Open (EO) and Eyes Closed (EC). Results In the two measurement conditions, the elderly women in Group 9thdecade presented mediolateral displacement and range, and mean velocity greater than the women's values in Groups 6thand 7thdecade. In the EO e EC situation, the displacement was higher in the elderly Group 9thdecade compared to younger groups. Group 8thhas a mean velocity greater than Group 6thdecade in the EO situation. Conclusions Posturography showed a decline in postural balance with advancing age, suggesting that the 9thdecade of life is a borderline age to this detriment due to an increase in postural instability.

ABSTRACT Objective: Fatigue of the ankle’s stabilizing muscles may influence the performance of functional activities and postural control. The purpose of this study was to evaluate the performance of healthy young adults using functional jump tests and static posturography control under pre- and post-fatigue conditions of the ankle invertor and evertor muscles. Methods: Thirty physically active healthy male and female (15 male and 15 female) volunteers (24.3 years) were enrolled in this prospective cross-sectional study. Participants performed tests on one day under a non-fatigued state of invertor and evertor muscles and on the second day in a fatigued state. Tests included static posturography on a force platform in a bipedal stance with eyes open and closed and in one-legged support with eyes open and functional jump tests (figure-of-8, side hop, 6-m crossover hop, and square hop). Fatigue of the ankle invertor and evertor muscles was induced using isokinetic dynamometry with 30 repetitions at 120°/s. Results: Participants had an average age of 24.3 years (SD ± 2.08), the height of 1.73 m (SD ± 0.08), and a weight of 68.63 kg (SD ± 10.29). The average Body Mass Index (BMI) was 22.88 (SD ± 2.46). A decrease in performance was observed in functional activities and postural control under all conditions after the induction of muscle fatigue, except for the speed at a bipedal stance with eyes open. Conclusions: Functional jump tests are low cost and useful for clinical practice and evaluation of the effects of muscle fatigue and could be used in clinical practice.

RESUMO Objetivo: Investigar a relação da antropometria e composição corporal com o equilíbrio postural dinâmico em idosas com baixa Densidade Mineral Óssea (DMO). Métodos: 45 idosas (≥ 60 anos), baixa DMO e diagnóstico nutricional entre baixo peso e sobrepeso. Para a avaliação da composição corporal utilizou-se a densitometria por emissão de raios x de dupla energia e exame antropométrico para aferir: massa corporal (kg), estatura (cm) e índice de massa corporal (IMC) (k/m2). A avaliação do equilíbrio postural dinâmico foi realizada pelo teste clínico mini Balance Master Evaluation System, pelo teste computadorizado Balance Master ® System e pelos testes Sit-to-Stand e Step Up/Over. Resultados: Houve correlação negativa do miniBESTest (r = − 0,566; p ≤ 0,001) e tempo de subir e descer um degrau (r = − 0,393; p ≤ 0,007) com a massa gorda, e correlação positiva do miniBESTest (r = 0,526; p ≤ 0,001) e tempo de subir e descer um degrau com a massa muscular (r = 0,297; p ≤ 0,04). Quanto às variáveis antropométricas, apenas a estatura apresentou correlação positiva (r = 0,296; p ≤ 0,04) com a velocidade no teste de sentar-se e levantar-se. Conclusão: A massa magra reduz as oscilações posturais. Em contrapartida, a massa gorda interfere de forma negativa no equilíbrio postural dinâmico de mulheres com baixa DMO. A estatura esteve relacionada ao equilíbrio postural dinâmico: quanto mais altas as idosas pior era seu equilíbrio. Nível de Evidência II, Estudos prognósticos - Investigação do efeito de característica de um paciente sobre o desfecho da doença.

ABSTRACT Objective: To investigate the relationship between anthropometry and body composition with dynamic postural balance in elderly women with low bone mineral density (BMD). Methods: 45 older women (≥ 60 years), low BMD and nutritional diagnosis of low weight to overweight. For the assessment of body composition, Dual energy X-ray emission densitometry and anthropometric examination were used to measure: body mass (kg), height (cm) and BMI (k/m2). The assessment of dynamic postural balance was performed by the mini Balance Master Evaluation System clinical test and the computerized Balance Master® System test by the Sit to Stand and Step Up/Over tests. Results: There was a negative correlation between miniBESTest (r = − 0.566; p ≤ 0.001) and time to ascend and descend step (r = − 0.393; p ≤ 0.007) with fat mass, and positive correlation with miniBESTest (r = 0.526; p ≤0.001) and time to go up and down a step with muscle mass (r = 0.297; p ≤ 0.04). As for anthropometric variables, only height showed a positive correlation (r = 0.296; p ≤ 0.04) with the speed in the sit and stand test. Conclusion: Lean mass reduces postural oscillations; in contrast, fat mass negatively interfered with dynamic postural balance in women with low BMD. Height was related to dynamic postural balance, the taller the elderly, the worse their balance. Level of Evidence II, Prognostic Studies - Investigating the Effect of a Patient Characteristic on the Outcome of Disease.