Efficacy of mHealth Interventions for Improving the Pain and Disability of Individuals With Chronic Low Back Pain: Systematic Review and Meta-Analysis.

Background: Low back pain is one of the main causes of disability worldwide. Individuals with chronic conditions have been widely affected by the COVID-19 pandemic. In this context, mobile health (mHealth) has become popular, mostly due to the widespread use of smartphones. Despite the considerable number of apps for low back pain available in app stores, the effectiveness of these technologies is not established, and there is a lack of evidence regarding the effectiveness of the isolated use of mobile apps in the self-management of low back pain. Objective: We summarized the evidence on the effectiveness of mHealth interventions on pain and disability for individuals with chronic low back pain. Methods: We conducted a systematic review and meta-analysis comparing mHealth to usual care or no intervention. The search terms used were related to low back pain and mHealth. Only randomized controlled trials were included. The primary outcomes were pain intensity and disability, and the secondary outcome was quality of life. Searches were carried out in the following databases, without date or language restriction: PubMed, Scopus, Embase, Physiotherapy Evidence Database (PEDro), the Cochrane Library, and OpenGrey, in addition to article references. The risk of bias was analyzed using the PEDro scale. Data were summarized descriptively and through meta-analysis (pain intensity and disability). In the meta-analysis, eligible studies were combined while considering clinical and methodological homogeneity. The certainty of evidence was assessed using the GRADE (Grading of Recommendations, Assessment, Development, and Evaluations) criteria. Results: A total of 5 randomized controlled trials were included, totaling 894 participants (447 allocated to the mHealth group and 445 to the usual care group), and they had similar methodological structure and interventions. Follow-up ranged from 6 weeks to 12 months. The studies did not demonstrate significant differences for pain intensity (mean difference -0.86, 95% CI -2.29 to 0.58; P=.15) and disability (standardized mean difference -0.24, 95% CI -0.69 to 0.20; P=.14) when comparing mHealth and usual care. All studies showed biases, with emphasis on nonconcealed allocation and nonblinding of the outcome evaluator. The certainty of evidence was rated as low for the analyzed outcomes. Conclusions: mHealth alone was no more effective than usual care or no treatment in improving pain intensity and disability in individuals with low back pain. Due to the biases found and the low certainty of evidence, the evidence remains inconclusive, and future quality clinical trials are needed.

Correlation between MOVA3D, a Monocular Movement Analysis System, and Qualisys Track Manager (QTM) during Lower Limb Movements in Healthy Adults: A Preliminary Study.

New technologies based on virtual reality and augmented reality offer promising perspectives in an attempt to increase the assessment of human kinematics. The aim of this work was to develop a markerless 3D motion analysis capture system (MOVA3D) and to test it versus Qualisys Track Manager (QTM). A digital camera was used to capture the data, and proprietary software capable of automatically inferring the joint centers in 3D and performing the angular kinematic calculations of interest was developed for such analysis. In the experiment, 10 subjects (22 to 50 years old), 5 men and 5 women, with a body mass index between 18.5 and 29.9 kg/m2, performed squatting, hip flexion, and abduction movements, and both systems measured the hip abduction/adduction angle and hip flexion/extension, simultaneously. The mean value of the difference between the QTM system and the MOVA3D system for all frames for each joint angle was analyzed with Pearson's correlation coefficient (r). The MOVA3D system reached good (above 0.75) or excellent (above 0.90) correlations in 6 out of 8 variables. The average error remained below 12° in only 20 out of 24 variables analyzed. The MOVA3D system is therefore promising for use in telerehabilitation or other applications where this level of error is acceptable. Future studies should continue to validate the MOVA3D as updated versions of their software are developed.

Burnout syndrome, work ability, quality of life and physical activity in teachers during the COVID-19 pandemic in Campo Grande, Brazil.

BACKGROUND: School performance encompasses several forms of representation, and this has been identified as stressing factors with negative repercussions on teachers' health. In 2020 this scenario was affected by the COVID-19 pandemic, with yet unknown consequences on teachers' health. Our hypothesis is that the disease affected both the quality of life and work ability of teachers. OBJECTIVE: To identify the association between burnout syndrome, work ability, quality of life and physical activity in basic education teachers during the COVID-19 pandemic in the city of Campo Grande, Brazil. METHODS: Data collection took place from April 2020 to April 2021 through an online form linked to Google Forms. Quality of life was measured using the WHOQOL-bref, Work Ability through Work Ability Index (WAI) and burnout syndrome aspects through MBI-HSS. The association between variables was assessed by Pearson's correlation test with p <  0,05. RESULTS: Teachers self-rated their quality of life positively (good/very good = 55.9%), showed good (43,1%) or very good (27,7%) work ability, and had low emotional fatigue (41.6%), low depersonalization (75.7%) and high personal fulfillment (58.4%). The highest correlations indicate that the greater the emotional fatigue, the lower the WAI (r = - 0.60); and the higher the WAI, the higher the quality of life (all p <  0,05). CONCLUSION: The associations indicate that those teachers who showed greater emotional fatigue showed less ability to work. In addition, a negative association between emotional fatigue and physical, social and environmental domain of quality of life was also expressed, which may be relevant to the work environment.

Motor Control Training Compared With Transcutaneous Electrical Nerve Stimulation in Patients With Disc Herniation With Associated Radiculopathy: A Randomized Controlled Trial.

OBJECTIVE: The aim of the study was to compare the effectiveness of motor control training and transcutaneous electrical nerve stimulation in relieving pain, reducing functional disability, and improving transversus abdominis activation in patients with lumbar disc herniation with associated radiculopathy. DESIGN: This is a randomized controlled trial. METHODS: Forty patients diagnosed with lumbar disc herniation were randomly divided into two groups: motor control training group (n = 20) and transcutaneous electrical nerve stimulation group (n = 20). INTERVENTIONS: The motor control training group and transcutaneous electrical nerve stimulation group attended 60 mini sessions twice a week for 8 wks, totaling to 16 sessions. MAIN OUTCOME MEASURES: The main outcome measures are pain, functional disability, and transversus abdominis activation capacity. RESULTS: Differences between both groups were observed after 8 wks, favoring the motor control training group. Motor control training was more effective than transcutaneous electrical nerve stimulation in relieving pain (mean difference = 3.3 points, 95% confidence interval = 2.12-4.48), reducing functional disability (mean difference = 8.4 points, 95% confidence interval = 5.44-11.36), improving the quality of pain (mean difference = 17 points, 95% confidence interval = 7.93-26.07), sensory quality of pain (mean difference = 10.3 points, 95% confidence interval = 5.55-15.05), and transversus abdominis activation (mean difference = 1.5 points, 95% confidence interval = 0.90-2.10). CONCLUSIONS: The results suggest that motor control training is more effective than transcutaneous electrical nerve stimulation with respect to relieving pain, reducing functional disability, and improving transversus abdominis activation in patients with lumbar disc herniation.

Musculoskeletal discomfort, work ability and fatigue in nursing professionals working in a hospital environment. / Desconforto musculoesquelético, capacidade de trabalho e fadiga em profissionais da enfermagem que atuam em ambiente hospitalar.

OBJECTIVE: To evaluate the musculoskeletal discomfort, work ability and residual fatigue in nursing professionals working in the hospital setting. METHOD: Cross-sectional study with professionals from a medium-sized public hospital. The Nordic symptom questionnaire, the work ability index, and the need for recovery scale (fatigue) were used. Data were analyzed descriptively and inferential tests were applied in order to verify the association of fatigue and work ability, and compare the fatigue among sectors analyzed. RESULTS: Participation of 110 professionals in the study. A total of 86.24% of workers reported musculoskeletal discomfort, with a higher prevalence in the cervical, thoracic and lumbar spine. Approximately 43% of professionals presented residual fatigue. There was a significant association between fatigue and reduction of work ability (p<0.003), as well as association between younger age and greater fatigue (p<0.03). CONCLUSION: Results demonstrated a high prevalence of musculoskeletal discomfort in the previous year and a considerable number of professionals with residual fatigue. There was a substantial portion of workers with moderate work ability and requiring attention in the medium term.

Comparison Between Transcutaneous Electrical Nerve Stimulation and Stabilization Exercises in Fatigue and Transversus Abdominis Activation in Patients With Lumbar Disk Herniation: A Randomized Study.

OBJECTIVE: The purpose of this study was to compare transcutaneous electrical nerve stimulation (TENS) and stabilization exercises in an attempt to prevent fatigue and improve muscle activation in patients with lumbar disk herniation associated with low back pain. METHODS: This study involved 29 patients (age range 25-58 years) randomized into 2 groups: the segmental stabilization group (n = 15), who received stabilization exercises on the transversus abdominis (TrA) and lumbar multifidus muscles; and the TENS group (n = 14), who received electrotherapy. Groups underwent 16 sessions, for 60 minutes, twice per week, and they were evaluated before and after intervention. Pain was measured using a visual analog scale, functional disability using the Oswestry Disability Index, muscle activation and fatigue with electromyography, and patients' ability to contract the TrA with a pressure biofeedback unit. Analyses within and between groups were performed. RESULTS: The stabilization group improved lumbar multifidus fatigue (median frequency [MF] initial [P = .002], MF final [P < .001], MF slope [P = .001], and resistance time [P < .001]), ability to contract the TrA (P < .001), pain (P < .001), and functional disability (P < .001). TENS only was effective for pain (P = .012). CONCLUSION: Although it relieved pain, TENS was not effective as a single treatment to prevent fatigue, increase TrA contraction, and reduce functional disability in herniated disk patients. Stabilization exercises alone improved all measured outcomes.

Desconforto musculoesquelético, capacidade de trabalho e fadiga em profissionais da enfermagem que atuam em ambiente hospitalar / Musculoskeletal discomfort, work ability and fatigue in nursing professionals working in a hospital environment / Incomodidad musculoesquelética, capacidad laboral y fatiga en profesionales de la enfermería que actúan en ambiente hospitalario

RESUMO Objetivo Avaliar o desconforto musculoesquelético, a capacidade para o trabalho e a fadiga residual em profissionais de enfermagem que atuam em Hospital. Método Estudo transversal com profissionais de um hospital público de médio porte. Foram utilizados o questionário nórdico de sintomas, o índice de capacidade para o trabalho e a escala de necessidade de descanso (fadiga). Os dados foram analisados descritivamente e aplicaram-se testes inferenciais com o intuito de verificar a associação da fadiga e a capacidade para o trabalho e comparar a fadiga entre os setores analisados. Resultados Participaram da pesquisa 110 profissionais. Um total de 86,24% dos trabalhadores relatou desconforto osteomuscular, com maior prevalência na coluna cervical, torácica e lombar. Aproximadamente 43% dos profissionais apresentaram fadiga residual. Verificou-se associação significante entre fadiga e redução da capacidade para o trabalho (p<0,003), assim como associação entre menor idade e maior fadiga (p<0,03). Conclusão Os resultados mostraram uma alta prevalência de desconforto osteomuscular no último ano e uma quantidade considerável de profissionais que apresentaram fadiga residual instalada. Destaca-se também uma importante parcela dos trabalhadores com moderada capacidade de trabalho, que requer atenção em médio prazo.

ABSTRACT Objective To evaluate the musculoskeletal discomfort, work ability and residual fatigue in nursing professionals working in the hospital setting. Method Cross-sectional study with professionals from a medium-sized public hospital. The Nordic symptom questionnaire, the work ability index, and the need for recovery scale (fatigue) were used. Data were analyzed descriptively and inferential tests were applied in order to verify the association of fatigue and work ability, and compare the fatigue among sectors analyzed. Results Participation of 110 professionals in the study. A total of 86.24% of workers reported musculoskeletal discomfort, with a higher prevalence in the cervical, thoracic and lumbar spine. Approximately 43% of professionals presented residual fatigue. There was a significant association between fatigue and reduction of work ability (p<0.003), as well as association between younger age and greater fatigue (p<0.03). Conclusion Results demonstrated a high prevalence of musculoskeletal discomfort in the previous year and a considerable number of professionals with residual fatigue. There was a substantial portion of workers with moderate work ability and requiring attention in the medium term.

RESUMEN Objetivo Evaluar la incomodidad musculoesquelética, la capacidad laboral y la fatiga residual en profesionales de la enfermería que actúan en Hospital. Método Estudio transversal con profesionales de un hospital público de mediano porte. Fueron utilizados el cuestionario nórdico de síntomas, el índice de capacidad laboral y la escala de necesidad de descanso. Los datos fueron analizados descriptivamente y se aplicaron pruebas inferenciales con el fin de verificar la asociación de la fatiga y la capacidad laboral y comparar la fatiga entre los sectores analizados. Resultados Participaron en la investigación 110 profesionales. Un total del 86,24% de los trabajadores relató incomodidad osteomuscular, con mayor prevalencia en la columna cervical, torácica y lumbar. Un 43% de los profesionales presentaron fatiga residual. Se verificó asociación significativa entre fatiga y reducción de la capacidad laboral (p<0,003), así como asociación entre menor edad y mayor fatiga (p<0,03). Conclusión Los resultados mostraron una alta prevalencia de incomodidad osteomuscular en el último año y una cantidad considerable de profesionales que presentaron fatiga residual instalada. Se destaca también una importante parte de los trabajadores con moderada capacidad laboral, que requiere de atención a mediano plazo.

Inter- and intra-rater reliability of computerized photogrammetry and universal goniometer in the measurement of hip flexion and abduction / Confiabilidade inter e intra-avaliadores na fotogrametria e do goniômetro universal na medida da abdução e flexão do quadril / La exactitud inter y intraexaminadores de la fotogrametría y del goniómetro universal en mediciones de abducción y flexión de las caderas

ABSTRACT The universal goniometer (UG) is the most frequently used tool for measuring range of motion (ROM), with demonstrated reliability. Computerized photogrammetry (CP) is widely used for postural assessment, but its role in the measurement of ROM of hip flexion and abduction has not yet been fully explored. This study aimed to test inter- and intra-rater reliability for measuring ROM of hip flexion and abduction using UG and CP, as well as the reliability between the instruments. Our sample consisted of 40 healthy volunteers (aged from 18 to 28 years). Measurements of ROM were conducted by two independent raters, 15 minutes apart, using UG and CP to assess inter-rater reliability. The procedures were repeated one week later by the first rater (intra-rater reliability). Using UG, inter-rater reliability was excellent for flexion and abduction (ICC=0.92 and 0.91, respectively); using CP, it was rated as very good (ICC=0.77 and 0.80, respectively). Intra-rater reliability using UG was excellent for flexion and abduction (ICC=0.95 and 0.92), and very good using CP (ICC= 0.81 and 0.89). The correlation between the instruments was excellent for flexion and very good for abduction (r=0.92 and r=0.82). Future investigations should seek a more diversified sample and symptomatic patients. Inter- and intra-rater reliability is high when measuring range of motion of hip flexion and abduction using both UG and CP, and the correlation between instruments is excellent for flexion and very good for abduction, meaning that both are valid.

RESUMO O goniômetro universal (GU) é uma ferramenta, com credibilidade comprovada, mais frequentemente usada para medir a amplitude de movimento (AM). A fotogrametria computadorizada (FC) é amplamente utilizada para avaliação postural, mas seu uso para medir a AM da abdução e flexão do quadril ainda não foi totalmente explorado. Este estudo visou testar a confiabilidade inter e intra-avaliadores para a medição da AM da abdução e flexão do quadril usando o GU e a FC, além da confiabilidade entre instrumentos. Nossa amostra constituiu-se de 40 voluntários saudáveis (idade entre 18 e 28 anos). As medições da AM foram conduzidas por dois avaliadores independentes, com 15 minutos de intervalo, usando o GU e a FC para analisar a confiabilidade entre avaliadores. Os procedimentos foram repetidos uma semana depois pelo primeiro avaliador (inter e intra-avaliadores). Com o GU, a confiabilidade inter e intra-avaliadores foi excelente para a flexão e abdução (ICC=0,92 e 0,91, respectivamente); a FC foi classificada como muito boa (ICC=0,77 e 0,80, respectivamente). Usando-se o GU, a confiabilidade inter e intra-avaliadores foi excelente para a flexão e abdução (ICC=0,95 e 0,92), e muito boa para a FC (ICC=0,81 e 0,89). A correlação entre instrumentos foi excelente para a flexão e muito boa para a abdução (r=0,92 e r=0,82). Estudos futuros sobre o assunto deveriam usar uma amostra mais diversificada e pacientes sintomáticos. A confiabilidade inter e intra-avaliadores é alta quando se mede a amplitude do movimento da flexão e abdução do quadril, usando-se o GU e a FC, e a correlação entre instrumentos é excelente para a flexão e muito boa para a abdução, o que significa que ambos são válidos.

RESUMEN El goniómetro universal (GU) es un instrumento comprobadamente fiable que se emplea para medir la amplitud del movimiento (AM). La fotogrametría computadorizada (FC) es más utilizada para evaluar la postura, pero no se emplea mucho para medir la AM de la abducción y flexión de las caderas. En este estudio el propósito es comprobar la exactitud entre e intraexaminadores en medir la AM de la abducción y flexión de las caderas, empleando el GU y la FC, además de la exactitud entre instrumentos. Participaron cuarenta personas sanas (con edad entre 18 y 28 años). Dos examinadores independientes midieron la AM, con 15 minutos de intervalo, empleando el GU y la FC para evaluar la exactitud entre examinadores. Los procedimientos fueron repetidos una semana después por el primer examinador (entre e intraexaminadores). Con el GU, la exactitud entre e intraexaminadores fue excelente para la flexión y abducción (ICC=0,92 y 0,91, respectivamente); y se clasificó la FC como muy buena (ICC=0,77 y 0,80, respectivamente). Con el empleo del GU, la exactitud intra y entre examinadores fue excelente para la flexión y abducción (ICC=0,95 y 0,92), y muy buena para la FC (ICC=0,81 y 0,89). La correlación entre instrumentos fue excelente para la flexión y muy buena para la abducción (r=0,92 y r=0,82). Se necesitan más estudios que utilicen un muestreo más diverso y con pacientes sintomáticos. La exactitud entra e intraexaminadores es muy eficaz, cuando se mide la amplitud del movimiento de la flexión y abducción de las caderas con el GU y la FC, y la correlación entre instrumentos es excelente para la flexión y muy buena para la abducción, lo que devela que ambos instrumentos son fiables.

Q-angle in patellofemoral pain: relationship with dynamic knee valgus, hip abductor torque, pain and function.

OBJECTIVE: To investigate the relationship between the q-angle and anterior knee pain severity, functional capacity, dynamic knee valgus and hip abductor torque in women with patellofemoral pain syndrome (PFPS). METHODS: This study included 22 women with PFPS. The q-angle was assessed using goniometry: the participants were positioned in dorsal decubitus with the knee and hip extended, and the hip and foot in neutral rotation. Anterior knee pain severity was assessed using a visual analog scale, and functional capacity was assessed using the anterior knee pain scale. Dynamic valgus was evaluated using the frontal plane projection angle (FPPA) of the knee, which was recorded using a digital camera during step down, and hip abductor peak torque was recorded using a handheld dynamometer. RESULTS: The q-angle did not present any significant correlation with severity of knee pain (r = -0.29; p = 0.19), functional capacity (r = -0.08; p = 0.72), FPPA (r = -0.28; p = 0.19) or isometric peak torque of the abductor muscles (r = -0.21; p = 0.35). CONCLUSION: The q-angle did not present any relationship with pain intensity, functional capacity, FPPA, or hip abductor peak torque in the patients with PFPS.

OBJETIVO: Investigar a relação entre o ângulo-q e intensidade da dor anterior no joelho, capacidade funcional, valgo dinâmico de joelho e torque abdutor do quadril em mulheres com síndrome da dor patelofemoral (SDPF). MÉTODOS: Participaram do estudo 22 mulheres com SDPF. O ângulo-q foi avaliado pela goniometria, as participantes foram posicionadas em decúbito dorsal com joelho e quadril estendido e quadril e pé em rotação neutra. A intensidade da dor anterior do joelho foi avaliada pela escala visual analógica de dor e a capacidade funcional com a escala de dor anterior no joelho. O valgo dinâmico foi avaliado pelo ângulo de projeção no plano frontal do joelho (APPF), registrado com câmera digital durante step down, e o pico de torque dos abdutores do quadril com dinamômetro manual. RESULTADOS: O ângulo-q não apresentou correlação significativa com a intensidade da dor no joelho (r = −0,29; p = 0,19), capacidade funcional (r = −0,08; p = 0,72), ângulo de projeção no plano frontal do joelho (r = −0,28; p = 0,19) e pico de torque isométrico dos músculos abdutores (r = −0,21; p = 0,35). CONCLUSÃO: O ângulo-q não apresentou relação com a intensidade da dor, capacidade funcional, ângulo de projeção no plano frontal do joelho e pico de torque dos abdutores do quadril em pacientes com SDPF.

Q-angle in patellofemoral pain: relationship with dynamic knee valgus, hip abductor torque, pain and function / Ângulo-q na dor patelofemoral: relação com valgo dinâmico de joelho, torque abdutor do quadril, dor e função

OBJECTIVE: To investigate the relationship between the q-angle and anterior knee pain severity, functional capacity, dynamic knee valgus and hip abductor torque in women with patellofemoral pain syndrome (PFPS). METHODS: This study included 22 women with PFPS. The q-angle was assessed using goniometry: the participants were positioned in dorsal decubitus with the knee and hip extended, and the hip and foot in neutral rotation. Anterior knee pain severity was assessed using a visual analog scale, and functional capacity was assessed using the anterior knee pain scale. Dynamic valgus was evaluated using the frontal plane projection angle (FPPA) of the knee, which was recorded using a digital camera during step down, and hip abductor peak torque was recorded using a handheld dynamometer. RESULTS: The q-angle did not present any significant correlation with severity of knee pain (r = -0.29; p = 0.19), functional capacity (r = -0.08; p = 0.72), FPPA (r = -0.28; p = 0.19) or isometric peak torque of the abductor muscles (r = -0.21; p = 0.35). CONCLUSION: The q-angle did not present any relationship with pain intensity, functional capacity, FPPA, or hip abductor peak torque in the patients with PFPS.

OBJETIVO: Investigar a relação entre o ângulo-q e intensidade da dor anterior no joelho, capacidade funcional, valgo dinâmico de joelho e torque abdutor do quadril em mulheres com síndrome da dor patelofemoral (SDPF). MÉTODOS: Participaram do estudo 22 mulheres com SDPF. O ângulo-q foi avaliado pela goniometria, as participantes foram posicionadas em decúbito dorsal com joelho e quadril estendido e quadril e pé em rotação neutra. A intensidade da dor anterior do joelho foi avaliada pela escala visual analógica de dor e a capacidade funcional com a escala de dor anterior no joelho. O valgo dinâmico foi avaliado pelo ângulo de projeção no plano frontal do joelho (APPF), registrado com câmera digital durante step down, e o pico de torque dos abdutores do quadril com dinamômetro manual. RESULTADOS: O ângulo-q não apresentou correlação significativa com a intensidade da dor no joelho (r = -0,29; p = 0,19), capacidade funcional (r = -0,08; p = 0,72), ângulo de projeção no plano frontal do joelho (r = -0,28; p = 0,19) e pico de torque isométrico dos músculos abdutores (r = -0,21; p = 0,35). CONCLUSÃO: O ângulo-q não apresentou relação com a intensidade da dor, capacidade funcional, ângulo de projeção no plano frontal do joelho e pico de torque dos abdutores do quadril em pacientes com SDPF.

Are lumbar multifidus fatigue and transversus abdominis activation similar in patients with lumbar disc herniation and healthy controls? A case control study.

PURPOSE: The aims of this study were to assess lumbar multifidus fatigue (LM) and transversus abdominis activation (TrA) in individuals with lumbar disc herniation associated with low back pain. METHODS: Sixty individuals were divided into the lumbar herniation (LHG, n = 30) and control groups (CG, n = 30). Fatigue of the LM was assessed using surface electromyography during the Sorensen effort test, and activation of the TrA with a pressure biofeedback unit. Pain intensity was determined using a visual analog scale and the McGill pain questionnaire. The Oswestry disability questionnaire and the Borg scale for self-evaluating exertion were used to assess functional disability. RESULTS: Fatigue was significantly more intense and the TrA activation was insufficient (p < 0.01) in individuals with disc herniation relative to the control group. The LHG had mild functional disability and moderate pain. There were differences in the initial exertion self-evaluation between groups, which were not observed in the final exertion evaluation. CONCLUSION: Individuals with lumbar disc herniation associated with low back pain have increased fatigue of the LM and decreased activation of the TrA, when compared to the control group.

Relationship between frontal plane projection angle of the knee and hip and trunk strength in women with and without patellofemoral pain.

BACKGROUND: It is theorized that increased dynamic knee valgus relates to decreased hip posterolateral muscle strength. OBJECTIVE: The aim here was to assess the relationship between the frontal plane projection angle (FPPA) of the knee and hip and trunk muscle strength in women with and without patellofemoral pain (PFP). METHODS: The sample comprised 43 women: Patellofemoral Pain Group (PPG, n = 22) and Control Group (CG, n = 21). Muscle strength for hip abduction, extension, external rotation and lateral core were measured using a handheld dynamometer. The FPPA was recorded during step-down. RESULTS: The PPG showed a deficit for hip muscles torque and increased FPPA (P < 0.05). Negative correlation of the FPPA-Peak was found in the CG for the hip abductor (r = -0.31) and posterolateral complex (r = -0.32) (P < 0.05). In the PPG, the FPPA-Peak showed a moderate negative correlation to the torque of external rotators and posterolateral hip muscles, although this correlation did not reach statistical significance. CONCLUSIONS: These findings suggest that women with patellofemoral pain present greater dynamic knee valgus and hip muscle weakness. Abductor and posterolateral hip muscles strength are associated with increased FPPA only in the pain-free population.

Does anterior knee pain severity and function relate to the frontal plane projection angle and trunk and hip strength in women with patellofemoral pain?

The aim of the present study was to determine the relationship between knee pain severity and function with the frontal plane projection angle (FPPA) and trunk and hip peak torque (PT) in women with patellofemoral pain (PFPS). Twenty-two women with PFPS were assessed. Knee pain severity (KPS) was assessed with an 11-point visual analog scale and function with an Anterior Knee Pain Scale. The FPPA was recorded with a digital camera. PT of extensors, abductors, and the lateral rotators of hip and lateral core stability were measured with a handheld dynamometer. FPPA was the only predictor for the KPS. Regarding predictors of function, PT of lateral core stability and the extensor and abductor of the hip explained 41.4% of the function. Increase in FPPA was associated with greater KPS, and the lowest PT of lateral core stability, hip abductors, and extensors was associated with lower function in women with PFPS.

The short-term effects of graded activity versus physiotherapy in patients with chronic low back pain: A randomized controlled trial.

BACKGROUND: Chronic low back pain is one of the most common problematic health conditions worldwide and is highly associated with disability, quality of life, emotional changes, and work absenteeism. Graded activity programs, based on cognitive behavioral therapy, and exercises are common treatments for patients with low back pain. However, recent evidence has shown that there is no evidence to support graded activity for patients with chronic nonspecific low back pain. AIM: to compare the effectiveness of graded activity and physiotherapy in patients with chronic nonspecific low back pain. METHODS: A total of 66 patients with chronic nonspecific low back pain were randomized to perform either graded activity (moderate intensity treadmill walking, brief education and strength exercises) or physiotherapy (strengthening, stretching and motor control). These patients received individual sessions twice a week for six weeks. The primary measures were intensity of pain (Pain Numerical Rating Scale) and disability (Rolland Morris Disability Questionnaire). RESULTS: After six weeks, significant improvements have been observed in all outcome measures of both groups, with a non-significant difference between the groups. For intensity of pain (mean difference = 0.1 points, 95% confidence interval [CI] = -1.1-1.3) and disability (mean difference = 0.8 points, 95% confidence interval [CI] = -2.6-4.2). No differences were found in the remaining outcomes. CONCLUSION: The results of this study suggest that graded activity and physiotherapy showed to be effective and have similar effects for patients with chronic nonspecific low back pain.

Postural control in individuals with and without non-specific chronic low back pain: a preliminary case-control study.

STUDY DESIGN: A preliminary case-control study. OBJECTIVE: To assess postural control in individuals with and without non-specific chronic low back pain (cLBP) during quiet standing. cLBP affects 12-33 % of the adult population. Reasons for pain chronicity are yet poorly known. Change in postural control may be a risk factor for cLBP, although available studies are not conclusive. METHODS: Sample consisted of 21 individuals with cLBP and 23 controls without cLBP. Balance was assessed using a force plate (Balance Master, NeuroCom) by the modified clinical test of sensory interaction and balance, pain severity by the visual analogue scale, quality of life with the SF-36 Questionnaire, and functional disability with the Roland-Morris Questionnaire. RESULTS: Groups were homogeneous for age, weight, height and body mass index. Relative to controls, participants in the cLBP group had deficits in the postural control, with greater postural sway in the quiet standing condition with closed eyes closed on unstable surfaces (p < 0.05) for the following parameters: total COP oscillation [cLBP 1,432.82 (73.27) vs CG 1,187.77 (60.30)], root mean square sagittal plane [cLBP 1.21 (0.06) vs CG 1.04 (0.04)], COP area [cLBP 24.27 (2.47) vs CG 16.45 (1.79)] and mean speed of oscillation [cLBP 12.97 (0.84) vs CG 10.55 (0.70)]. CONCLUSION: Postural control, as evidenced by increased oscillation of COP, is impaired in individuals with cLBP relative to controls. Differences are magnified by visual deprivation and unstable surface conditions.

Efficacy of graded activity versus supervised exercises in patients with chronic non-specific low back pain: protocol of a randomised controlled trial.

BACKGROUND: Low back pain is a relevant public health problem, being an important cause of work absenteeism worldwide, as well as affecting the quality of life of sufferers and their individual functional performances. Supervised active physical routines and of cognitive-behavioral therapies are recommended for the treatment of chronic Low back pain, although evidence to support the effectiveness of different techniques is missing. Accordingly, the aim of this study is to contrast the effectiveness of two types of exercises, graded activity or supervised, in decreasing symptoms of chronic low back pain. METHODS/DESIGN: Sample will consist of 66 patients, blindly allocated into one of two groups: 1) Graded activity which, based on an operant approach, will use time-contingent methods aiming to increase participants' activity levels; 2) Supervised exercise, where participants will be trained for strengthening, stretching, and motor control targeting different muscle groups. Interventions will last one hour, and will happen twice a week for 6 weeks. Outcomes (pain, disability, quality of life, global perceived effect, return to work, physical activity, physical capacity, and kinesiophobia) will be assessed at baseline, at treatment end, and three and six months after treatment end. Data collection will be conducted by an investigator blinded to treatment allocation. DISCUSSION: This project describes the randomisation method that will be used to compare the effectiveness of two different treatments for chronic low back pain: graded activity and supervised exercises. Since optimal approach for patients with chronic back pain have yet not been defined based on evidence, good quality studies on the subject are necessary. TRIAL REGISTRATION: NCT01719276.

Effects of muscular stretching and segmental stabilization on functional disability and pain in patients with chronic low back pain: a randomized, controlled trial.

OBJECTIVE: The purpose of this study was to compare the effects of 2 exercise programs, segmental stabilization exercises (SSEs) and stretching of trunk and hamstrings muscles, on functional disability, pain, and activation of the transversus abdominis muscle (TrA), in individuals with chronic low back pain. METHODS: A total of 30 participants were enrolled in this study and randomly assigned to 1 of 2 groups as a function of intervention. In the segmental stabilization group (SS), exercises focused on the TrA and lumbar multifidus muscles, whereas in the stretching group (ST), exercises focused on stretching the erector spinae, hamstrings, and triceps surae. Severity of pain (visual analog scale and McGill pain questionnaire) and functional disability (Oswestry disability questionnaire) and TrA muscle activation capacity (Pressure Biofeedback Unit, or PBU) were compared as a function of intervention. Interventions lasted 6 weeks, and sessions happened twice a week (30 minutes each). Analysis of variance was used for intergroup and intragroup comparisons. RESULTS: As compared with baseline, both treatments were effective in relieving pain and improving disability (P < .001). Those in the SS group had significantly higher gains for all variables. The stretching group did not effectively activate the TrA (P = .94). CONCLUSION: Both techniques improved pain and reduced disability. In this study, SS was superior to muscular stretching for the measured variables associated with chronic low back pain.

Postural control in elderly women with osteoporosis: comparison of balance, strengthening and stretching exercises. A randomized controlled trial.

OBJECTIVE: To compare the efficacy of balance training associated with muscle strengthening or stretching, relative to no intervention, in the postural control of elderly women with osteoporosis. DESIGN: A randomized, controlled trial. SUBJECTS AND INTERVENTIONS: Sample consisted of 50 women aged 65 years or older, with osteoporosis, randomized into one of three groups: strengthening group (n = 17) performed balance training with muscle strengthening; stretching group (n = 17) performed balance training with stretching; and control group (n = 16), no activities. Interventions lasted eight weeks, twice a week, 60 minutes a day. MAIN MEASURES: Postural control was evaluated by the modified Clinical Test of Sensory Interaction for Balance (CTSIBm) and Limits of Stability Test. Strength was assessed by dynamometry and the shortening of the hamstrings by goniometry. RESULTS: Relative to controls, participants in the strengthening group displayed significantly increased dorsiflexion strength and knee flexion strength, as well as centre of pressure velocity, directional control, and oscillation velocity (CTSIBm test). The stretching group had significantly improvements in hamstring length, knee flexion strength, centre of pressure velocity, and amplitude of movements. Relative to the stretching group, the strengthening group yielded better knee extension strength and directional control. CONCLUSION: The results suggest that both interventions are effective in improving postural control when compared to the control group, and the strengthening group was superior to the stretching group in knee extension strength and in directional control.

Equilíbrio, controle postural e força muscular em idosas osteoporóticas com e sem quedas / Balance, postural control and muscle strength in osteoporotic elderly women with and without falls

Um dos maiores problemas de saúde pública na população idosa são as quedas, agravando-se quando relacionadas à presença de osteoporose. Dentre os vários fatores de risco, destacam-se a diminuição do equilíbrio, controle postural e força muscular. O objetivo deste trabalho foi comparar o equilíbrio, o controle postural e a força muscular em idosas osteoporóticas com e sem quedas referidas no último ano. Foram avaliadas 45 mulheres entre 65 e 85 anos, divididas em dois grupos com base no relato de quedas nos 12 meses anteriores à avaliação: grupo com quedas (GCQ; n=21) e grupo sem quedas (GSQ; n=24). O equilíbrio foi avaliado por meio da escala de equilíbrio de Berg; o controle postural pelo teste clínico modificado de interação sensorial no equilíbrio (mCTSIB), realizado no equipamento Balance Master®; e a força muscular dos flexores e extensores de joelho e dorsiflexores de tornozelo, com dinamômetro EMG System do Brasil®. Foi considerado nível de significância α=0,05. Houve diferença significativa no equilíbrio (p<0,01) e na velocidade de oscilação do Centro de Pressão (CP) durante o teste mCTSIB nas condições olhos fechados superfície estável (p=0,05) e olhos abertos superfície instável (p<0,01), com valores maiores para o GCQ. Os grupos foram semelhantes entre si em relação à força muscular (p>0,05). Nossos resultados indicam que idosas osteoporóticas com histórico de quedas nos últimos 12 meses possuem pior equilíbrio e controle postural em relação às osteoporóticas sem quedas referidas.

Falls are one of the biggest public health problems in the elderly population, worsening when related to the presence of osteoporosis. Among the various risk factors are highlighted decreased balance, muscle strength and postural control. This study aim is to compare the balance, postural control and muscle strength in osteoporotic elderly women with and without falls reported in the last year. We evaluated 45 women between 65 and 85 years, divided into two groups, based on reports of falls in the 12 months prior to assessment: group with falls (n=21) and group without falls (n=24). Balance was assessed using the Berg balance scale; postural control by the modified clinical test of sensory interaction on balance (mCTSIB); performed by equipment Balance Master®, and muscle strength of knee flexors and extensors and ankle extensor by the dynamometer® EMG System of Brazil. We considered the level of significance α=0.05. There were significant differences in balance (p<0.01) and the speed of oscillation of the center of pressure (CP) during the test conditions mCTSIB eyes closed surface (p=0.05) and unstable eyes open (p<0.01), with higher values for the group with falls. The groups were similar to muscle strength (p>0.05). Our results indicate that osteoporotic elderly women with a history of falls in the last 12 months have poor balance and postural control in elderly osteoporotic compared to those without falls.

Segmental stabilization and muscular strengthening in chronic low back pain: a comparative study.

OBJECTIVE: To contrast the efficacy of two exercise programs, segmental stabilization and strengthening of abdominal and trunk muscles, on pain, functional disability, and activation of the transversus abdominis muscle (TrA), in individuals with chronic low back pain. DESIGN: Our sample consisted of 30 individuals, randomly assigned to one of two treatment groups: segmental stabilization, where exercises focused on the TrA and lumbar multifidus muscles, and superficial strengthening, where exercises focused on the rectus abdominis, abdominus obliquus internus, abdominus obliquus externus, and erector spinae. Groups were examined to discovere whether the exercises created contrasts regarding pain (visual analogical scale and McGill pain questionnaire), functional disability (Oswestry disability questionnaire), and TrA muscle activation capacity (Pressure Biofeedback Unit = PBU). The program lasted 6 weeks, and 30-minute sessions occurred twice a week. Analysis of variance was used for inter- and intra-group comparisons. The significance level was established at 5%. RESULTS: As compared to baseline, both treatments were effective in relieving pain and improving disability (p < 0.001). Those in the segmental stabilization group had significant gains for all variables when compared to the ST group (p < 0.001), including TrA activation, where relative gains were 48.3% and -5.1%, respectively. CONCLUSION: Both techniques lessened pain and reduced disability. Segmental stabilization is superior to superficial strengthening for all variables. Superficial strengthening does not improve TrA activation capacity.