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OBJECTIVES: Studies exploring variations in peripheral muscle oxygenation and pressure pain thresholds (PPT) of masticatory muscles in individuals with Temporomandibular Disorders (TMDs) are limited. The purpose of this study was to compare variations in peripheral oxygenation of the masseter muscle; PPT of the masseter and temporal muscles and correlate peripheral muscle oxygenation and PPT of the masseter muscle in individuals with different types of TMDs. MATERIALS AND METHODS: Cross-sectional study involving 116 participants classified into three groups: muscle group (MG, n = 32), joint group (JG, n = 30) and muscle-joint group (MJG, n = 54). Individuals aged 26.97 ± 6.93, 68.97% female, 31,03% males were included. All participants were evaluated using the Diagnostic Criteria for Temporomandibular Disorders, Near-infrared spectroscopy (NIRS) for peripheral muscle oxygenation and pressure algometer for PPT. RESULTS: There was no difference in masseter muscle oxygenation among groups. In the masseter muscle, a weakly positive correlation was observed between PPT and variation in tissue saturation index in the MG (rho = 0.365) and JG (rho = 0.317). In addition, the MJG expressed lower PPT (p = 0.004) than JG, demonstrating that MJG had more pain in this muscle. CONCLUSIONS: MJG have lower PPT in the masseter muscle. Although the PPT is dependent on the type of TMDs, the correlation between PPT and oxygenation is weak. All TMDs groups evaluated (MG, JG, MJG) showed hemodynamic similarities of the masseter muscle. CLINICAL RELEVANCE: Understanding pain thresholds and the hemodynamic behavior of the masticatory muscles contributes to a more assertive physiotherapeutic assessment in TMDs, serving as a basis for careful and individualized interventions.

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BACKGROUND AND PURPOSE: Nonspecific neck pain (NNP) is a common idiopathic disorder in the general population that affects the trapezius muscle (TM) and blood supply, thereby compromising the fascial system. Myofascial reorganization (MR) is a physical therapy technique that can influence the dynamics of local fluids reducing excessive muscle tension and capillary constriction, and increasing local blood flow. This study aimed to investigate whether MR improves peripheral muscle oxygenation. METHODS: This was a quasi-experimental study with an intentional non-probability sample. Fifty participants (women: 36, men: 14) with and without NNP were assigned to either the experimental group (EG: n = 25, with NNP, subjected to MR) or the control group (CG: without NNP, no MR intervention). TM oxygenation was measured using near-infrared spectroscopy (NIRS) before and after a single intervention. All participants were evaluated and reassessed after 10 min. RESULTS: The results revealed that immediately after 10 min of MR, the EG exhibited an increase in the oxyhemoglobin level of the medium fibers of the TM (0.72 ± 1.47 vs. -0.14 ± 1.33 mmol/dL, p = 0.01). In addition, functional disability (CG: 5.48 ± 5.58%/EG: 21.12 ± 7.73%) and neck pain were measured using the neck disability index. The pain pressure threshold (CG: 70.49 ± 32.29 kgf/EG: 51.08 ± 27.65 kgf) and pain intensity (CG: 0.76 ± 1.56/EG: 3.28 ± 2.35) were also measured. CONCLUSION: The findings indicate that application of MR for 10 min increases the tissue oxyhemoglobin level in the TM of the group with NNP compared to the CG without NNP.

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BACKGROUND: The shoulder joint is the most commonly injured joint in CrossFit practitioners, because of the high intensity and loads associated with this sport. Despite the large number of clinical cases, there is a shortage of studies that investigate influence of biomechanical aspects of upper limbs' injuries on CrossFit practitioners. This study hypothesized that there would be a difference in function, strength, and muscle activation between Crossfit practitioners with and without shoulder pain. METHODS: We divided 79 Crossfit practitioners into two groups according to whether they reported pain (n = 29) or no pain (n = 50) in the shoulder during Crossfit training. Muscle function, strength, and activation were assessed using the Disability Arm, Shoulder and Hand function questionnaire, Upper Quarter Y Balance Test and Closed Kinetic Chain Upper Extremity Stability Test shoulder tests, isometric muscle strength assessment by manual dynamometry and muscle activation by surface electromyography and pain report. RESULTS: The function based on questionnaire was associated with pain (p = 0.004). We observed a statistically significant difference between the two groups only in the surface electromyography activity of the lower trapezius, and in the variables of shoulder pain and function (p = 0.038). CONCLUSION: Crossfit practitioners with shoulder pain occurring during training showed good function and stability of the shoulder joint, but there was a reduction in the activation of stabilizing muscles, especially the lower trapezius. Trial registration Registro Brasileiro de Ensaios Clinico (Brasilian National Registry) with the ID: RBR-2gycyv.

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Abstract Introduction: Breast cancer is the most common type of cancer among women. Treatments can lead to complications modifying upper limbs movement patterns and generating pain and functionality loss. Kinesiotherapy and myofascial reorganization (MR) have shown positive effects reducing chronic pain and improving upper limbs function. We hypothesize that these techniques can maximize results and reduce treatment time in clinical practice. Objective: To develop a study protocol to verify whether MR associated with kinesiotherapy is more effective than isolated kinesiotherapy to treat chronic pain and upper limb dysfunction in breast cancer survivors. Methods: Participants will be divided into two groups: intervention group (myofascial reorganization + kinesiotherapy) and sham group (traditional massage + kinesiotherapy). Six treatment sessions (once a week) and three-time assessment will occur. Instruments for assessing pain and functionality will be Visual Analogue Scale, Body Pain Diagram, Disabilities of the Arm, Shoulder and Hand Questionnaire, and goniometry. Statistical analysis will be conducted based on intention-to-treat analysis. To analyze the difference of means between groups, we will use T-Student or U Mann-Whitney test. Repeated measures ANOVA will be used to check treatments effects. Significance level for all tests will be 5%. Conclusion: We believe that the developed study protocol will show that MR associated with kinesiotherapy improve chronic pain and upper limbs functionality of breast cancer survivors.

Resumo Introdução: O câncer de mama é o tipo de câncer mais comum entre as mulheres. Os tratamentos podem levar a complicações, modificando os padrões de movimento dos membros superiores e gerando dor e perda de funcionalidade. A cinesioterapia e a reorganização miofascial (RM) têm demonstrado efeitos positivos na redução da dor crônica e na melhora da função dos membros superiores. A hipótese do presente estudo é que essas técnicas podem maximizar os resultados e reduzir o tempo de tratamento na prática clínica. Objetivo: Desenvolver um protocolo para verificar se a RM associada à cinesioterapia é mais eficaz do que a cinesioterapia isolada no tratamento da dor crônica e disfunção do membro superior em sobreviventes de câncer de mama. Métodos: As participantes serão divididas em dois grupos: grupo intervenção (reorganização miofascial + cinesioterapia) e grupo sham (massagem tradicional + cinesioterapia). Serão realizadas seis sessões de tratamento (uma vez por semana) e três avaliações. Os instrumentos de avaliação da dor e da funcionalidade serão a Escala Visual Analógica, o Diagrama de Dor Corporal, o Questionário de Deficiências do Braço, Ombro e Mão e a goniometria. A análise estatística será realizada com base na análise de intenção de tratar. Para analisar a diferença de médias entre os grupos, serão utilizados o teste T-Student ou U Mann-Whitney. ANOVA de medidas repetidas será utilizada para verificar os efeitos dos tratamentos. O nível de significância para todos os testes será de 5%. Conclusão: Espera-se que a RM associada à cinesioterapia melhore a dor crônica e a funcionalidade dos membros superiores de sobreviventes de câncer de mama.

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INTRODUCTION: Treatment for breast cancer can cause adverse effects such as pain and reduced upper limb function which can affect activities of daily living. The Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire is the most used tool for evaluating function in breast cancer survivors. However, some specific aspects have raised discussions about its restricted coverage, which can generate several biases. OBJECTIVE: To determine if DASH scores differed when assessed before and after task-oriented training (TOT) at 3 and 6 months after breast cancer surgery. DESIGN: Prospective cohort study. SETTING: Institutional study of 22 women assessed at 3 and 6 months after breast cancer surgery. MAIN OUTCOME MEASURES: The DASH questionnaire and TOT assessment. Two correlation tests were performed: Spearman's correlation between the total score of the two DASH scores (pre- and post-TOT) and the Kendall's tau correlation between each of the items. RESULTS: There was a moderate and excellent correlation between final DASH scores, pre- and post-TOT, at both 3 and 6 months postoperatively. However, when assessed individually, most of the DASH items were poorly correlated. There was also no agreement between the total DASH scores pre- and post-TOT as assessed by Bland-Altman plots. CONCLUSION: Both the DASH and TOT are considered useful in clinical practice to assess upper limb function, although the use of TOT in some of the DASH items may reduce memory bias and improve skills estimation.

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Abstract Introduction: The inability to maintain good pelvic stability has been attributed to inefficient muscle coordination and deconditioning of the stabilizing muscles. Despite this, little is known about the role of the pelvic muscles in anteversion and retroversion movements. Objective: To compare the neuromuscular activity of the tensor fascia lata, gluteus medius, upper and lower portions of the gluteus maximus, and multifidus in pelvic anteversion and retroversion. Methods: The neuromuscular activity of 17 healthy young adults (aged 25.3 ± 4.6 years) was assessed during five repetitions of the pelvic anteversion and retroversion movements. The Vicon-Nexus system (10 cameras) was used for the kinematic analysis of the pelvis in the sagittal plane (anteversion and retroversion), and the TeleMyo DTS Desk Receiver electromyograph and the Myomuscle v. 3.8 software to measure neuromuscular activity. The paired samples t-test was used to compare muscle activity between pelvic anteversion and retroversion movements using the Statistica v.8 software with a significance level of p < 0.05. Results: The comparison of the movements showed greater muscle activity in the inferior gluteus maximus in retroversion and greater activity in the multifidus in pelvic anteversion. The upper portion of the gluteus maximus showed relevant activation in both movements. Conclusion: There was more pronounced activity of the lower portion of the gluteus maximus in retroversion, while the upper gluteus maximus showed relevant activation level in both movements. The multifidi were more active in retroversion.

Resumo Introdução: A incapacidade de manter uma boa estabilidade pélvica tem sido atribuída à coordenação muscular ineficiente e ao descondicionamento dos músculos estabilizadores. Apesar disso, pouco se sabe sobre a função dos músculos pélvicos nos movimentos de anteversão e retroversão. Objetivo: Comparar a atividade neuromuscular do tensor da fáscia lata, glúteo médio, porções inferior e superior do glúteo máximo e multífidos durante a anteversão e retroversão pélvica. Métodos: A atividade neuromuscular de 17 adultos jovens saudáveis (25,3 ± 4,6 anos) foi avaliada durante cinco repetições dos movimentos de anteversão e retroversão pélvica. Utilizou-se o sistema Vicon-Nexus (10 câmeras) para a análise cinemática da pelve no plano sagital (anteversão e retroversão), e o eletromiógrafo TeleMyo DTS Desk Receiver e o software MyoMuscle v. 3.8 para mensurar a atividade neuromuscular. Testes t pareados foram conduzidos para comparar a atividade muscular entre os movimentos de anteversão e retroversão pélvica, utilizando-se o software Statistica v.8 com nível de significância de p < 0,05. Resultados: Quando comparados os movimentos, maior atividade muscular foi observada para o glúteo máximo inferior durante a retroversão e maior atividade para os multífidos durante a anteversão pélvica. A porção superior do glúteo máximo apresentou ativação relevante em ambos os movimentos. Conclusão: Houve atividade mais pronunciada da porção inferior do glúteo máximo na retroversão enquanto o glúteo máximo superior apresentou nível relevante de ativação em ambos os movimentos; os multífidos se mostraram mais ativos na retroversão.

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OBJECTIVE: Evaluate the cognitive function and its relationship with balance, history of falls, and fear of falling in the elderly. METHODS: We evaluated 250 elderly persons aged at least 60 years, who answered a sociodemographic questionnaire about the occurrence of falls in the last year. The cognitive function, balance, and fear of falling were assessed using the Mini-Mental State Examination (MMSE), Berg Balance Scale (BBS), and Falls Efficacy Scale (FES-I) scores, respectively. Participants were allocated into two groups based on the Mini-Mental State Examination (MMSE) score, the Group with Possible Cognitive Decline (GPCD) and the group with no cognitive decline (GNCD). We performed Student's t-test and Pearson's correlation for independent samples. RESULTS: The Group with Possible Cognitive Decline (GPCD) showed lower balance (p=0.003) and greater fear of falling (p=0.008) (BBS=50.98±4.68; FES-I=26.06±8.78) compared to the GNCD (BBS=52.53±3.047; FES-I=23.21±7.74). CONCLUSION: Elderly persons with cognitive decline have lower balance, greater fear of falling, and greater recurrence of falls.

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Objective To compare the plantar pressure distribution and the kinematics of the rearfoot on the stance phase of subjects with or without patellofemoral pain syndrome (PFPS). Methods A total of 26 subjects with PFPS and 31 clinically healthy subjects, who were paired regarding age, height and mass, participated in the study. The plantar pressure distribution (peak pressure) was assessed in six plantar regions, as well as the kinematics of the rearfoot (maximum eversion angle, percentage of the stance phase when the maximum angle was reached, and percentage of the stance phase in which the rearfoot was in eversion). The data were analyzed by descriptive and inferential statistics, with a significance level of p ≤ 0.05. Results The pressure on the six plantar regions analyzed and the magnitude of the maximum eversion angle of the rearfoot when walking on flat surfaces did not present differences among the subjects with PFPS. However, the PFPS subjects showed, when walking, an earlier maximum eversion angle of the rearfoot than the subjects on the control group, and stayed less time with the rearfoot in eversion. Conclusion The PFPS seems to be related to modifications on the temporal pattern on the kinematics of the rearfoot.

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Abstract Objective To compare the plantar pressure distribution and the kinematics of the rearfoot on the stance phase of subjects with or without patellofemoral pain syndrome (PFPS). Methods A total of 26 subjects with PFPS and 31 clinically healthy subjects, who were paired regarding age, height and mass, participated in the study. The plantar pressure distribution (peak pressure) was assessed in six plantar regions, as well as the kinematics of the rearfoot (maximum eversion angle, percentage of the stance phase when the maximum angle was reached, and percentage of the stance phase in which the rearfoot was in eversion). The data were analyzed by descriptive and inferential statistics, with a significance level of p≤ 0.05. Results The pressure on the six plantar regions analyzed and the magnitude of the maximum eversion angle of the rearfoot when walking on flat surfaces did not present differences among the subjects with PFPS. However, the PFPS subjects showed, when walking, an earlier maximum eversion angle of the rearfoot than the subjects on the control group, and stayed less time with the rearfoot in eversion. Conclusion The PFPS seems to be related to modifications on the temporal pattern on the kinematics of the rearfoot.

Resumo Objetivo Comparar a distribuição da pressão plantar e a cinemática do retropé durante a fase de apoio da marcha de sujeitos com e sem síndrome da dor patelofemoral (SDPF). Métodos Participaram 26 sujeitos com SDPF e 31 clinicamente saudáveis, pareados em idade, estatura e massa corporal. Foi avaliada a distribuição da pressão plantar (pico de pressão) em seis regiões plantares, e a cinemática do retropé (ângulo máximo de eversão do retropé, porcentagem da fase de apoio da marcha em que o ângulo é atingido, e porcentagem da fase de apoio em que o retropé permaneceu em eversão). Os dados foram analisados por meio da estatística descritiva e inferencial, com nível de significância de p≤ 0,05. Resultados A pressão nas seis regiões plantares analisadas e a magnitude do ângulo máximo de eversão do retropé durante a marcha em superfície plana não se mostrou diferente nos sujeitos com SDPF. No entanto, sujeitos com SDPF apresentaram, dentro do ciclo da marcha, ângulo máximo de eversão do retropé mais cedo do que sujeitos do grupo controle, e permaneceram menos tempo com o retropé em eversão. Conclusão A SDPF parece estar relacionada à alteração no padrão temporal na cinemática do retropé.

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The aim of this study was to conduct a systematic review to determine the quality of evidence of studies assessing isokinetic hip muscle strength in adult non-injured individuals. We also aimed to summarise and pool data of normative values for hip muscle strength. The influence of methodological and participant-related factors on hip strength performance was explored as well. Guidelines proposed in the PRISMA were used to undertake a search strategy involving the keyword 'hip' associated with a set of keywords reflecting muscle strength. Five databases were searched: ProQuest, PubMed, Science Direct, Scopus and Web of Science. From the 2,939 records initially retained, 28 articles were included in this systematic review. Eight articles were classified as high quality. This systematic review exposed the methodological fragility of most studies assessing hip strength in non-injured adult population. Only data from studies with a small number of participants are available to be used as reference. A few individual studies suggest no differences in torque parameters between dominant and non-dominant lower limbs; differences in torque parameters between age groups; and between male and female participants. Overall, reference values for hip muscle performance in isokinetic tests are mostly unclear.

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