Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 18.712
Filtrar
1.
PLoS One ; 19(7): e0306966, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38990907

RESUMO

The most common risk factor of computer workers is poor head and neck posture. Therefore, upright seated posture has been recommended repeatedly. However, maintaining an upright seated posture is challenging during computer work and induces various complaints, such as fatigue and discomfort, which can interfere working performance. Therefore, it is necessary to maintain an upright posture without complaints or intentional efforts during long-term computer work. Alignment devices are an appropriate maneuver to support postural control for maintaining head-neck orientation and reduce head weight. This study aimed to demonstrate the effects of workstations combined with alignment device on head-neck alignment, muscle properties, comfort and working memory ability in computer workers. Computer workers (n = 37) participated in a total of three sessions (upright computer (CPT_U), upright support computer (CPT_US), traction computer (CPT_T) workstations). The craniovertebral angle, muscles tone and stiffness, visual analog discomfort scale score, 2-back working memory performance, and electroencephalogram signals were measured. All three workstations had a substantial effect on maintaining head-neck alignment (p< 0.001), but only CPT_US showed significant improvement on psychological comfort (p = 0.04) and working memory performance (p = 0.024), which is consistent with an increase in delta power. CPT_U showed the increased beta 2 activity, discomfort, and false rates compared to CPT_US. CPT_T showed increased alpha and beta 2 activity and decreased delta activity, which are not conductive to working memory performance. In conclusion, CPT_US can effectively induce efficient neural oscillations without causing any discomfort by increasing delta and decreasing beta 2 activity for working memory tasks.


Assuntos
Cabeça , Memória de Curto Prazo , Postura , Humanos , Memória de Curto Prazo/fisiologia , Masculino , Adulto , Postura/fisiologia , Cabeça/fisiologia , Computadores , Feminino , Pescoço/fisiologia , Eletroencefalografia , Adulto Jovem
2.
J Indian Prosthodont Soc ; 24(3): 273-278, 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38946511

RESUMO

AIM: The aim of this study is to evaluate the influence of occlusion on body posture and plantar arch pressure. SETTINGS AND DESIGN: An Observational analysis to Analyze the Influence of Occlusion on Plantar Pressure and Body Posture. MATERIALS AND METHODS: A total of 30 asymptomatic subjects were selected for the study including 18 females and 12 males from age group 22 years to 28 years with a mean age of 24.83 years. Each subject underwent evaluation of occlusion at MIP using a Digital Occlusal analyzer (T-Scan III). At this point, the subjects were made to stand on a mat scan which consisted of a large postural platform sensor and a computer that displayed the plantar pressure data. The computer connected to the T Scan displayed the occlusal pressure analysis. This was followed by an evaluation of body posture using a posture grid where the photographs were taken and an evaluation of the frontal and lateral photos was done using the APECS - posture analysis app. STATISTICAL ANALYSIS USED: Statistical package for social sciences (SPSS) for windows version 22.0 Released 2013, Armonk, N Y: IBM Corp., was used to perform Statistical Analysis. A chi-square test was applied for qualitative variables to find the association. Paired t-test was applied to compare the changes in the quantitative parameters in eye-open and eye-closed conditions. The level of significance was set at 5%. RESULTS: As observed from the results, occlusion for 40% of the subjects, where n = 12, was dominant on the right side. Occlusion for 23.3% of subjects, where n = 7, was dominant on the left side. Whereas, for 36.7% of subjects, where n = 11, the pressure distribution was almost equal on both sides. The inclination of body posture for 23.3% of subjects, where n = 7, was towards the right side. The inclination of body posture for 50% of subjects, where n = 11, was towards the left side. And, the inclination of body posture for 26.7% of subjects, where n = 8, was neutral i.e., balanced on the right and left side. Plantar pressure for 6.7% of subjects, where n = 2, was dominant on the right side. Plantar pressure for 36.7% of subjects, where n = 11, was dominant on the left side. Whereas, for 56.7% of subjects, where n = 17, the plantar pressure distribution was almost equal on both sides. CONCLUSION: On correlating the three parameters, it was found that occlusion for most of the subjects dominated on the right side, while body posture and plantar pressure dominated on the contralateral i.e., left side.


Assuntos
, Postura , Pressão , Humanos , Masculino , Feminino , Postura/fisiologia , Adulto , Adulto Jovem , Pé/fisiologia , Oclusão Dentária
3.
Med Sci Monit ; 30: e944614, 2024 Jul 02.
Artigo em Inglês | MEDLINE | ID: mdl-38952002

RESUMO

BACKGROUND This study was conducted to investigate physical risk factors in patients with non-specific neck pain. The correlations among pain intensity, pressure pain threshold, range of motion (ROM), and disability index were analyzed in 50 patients with non-specific neck pain at a hospital in Korea. MATERIAL AND METHODS We enrolled 50 patients diagnosed with non-specific neck pain by a doctor. All subjects were evaluated for pain intensity, pressure threshold, degree of disability, active range of motion (ROM) of the neck, upper cervical rotation ROM, muscular endurance of deep cervical flexor, compensatory movements for neck flexion, forward head posture, shoulder height difference, and rounded shoulder posture. The correlation between each variable was analyzed. RESULTS Pain intensity had a significant correlation between cervical rotation ROM, cervical flexion-rotation ROM, rounded shoulder posture, shoulder height difference, and forward head posture (P<.05). There was a significant correlation between the pressure pain threshold and the cervical extension ROM, cervical flexion-rotation ROM, and rounded shoulder height (P<.05). The disability index had a significant correlation between the cervical rotation ROM, cervical flexion-rotation ROM, rounded shoulder posture, and the compensatory movement of neck flexion (P<.05). CONCLUSIONS Physical risk factors for non-specific neck pain included cervical rotation ROM, upper cervical rotation ROM, rounded shoulder posture, shoulder height difference, and cervical flexion compensatory movements, which can affect pain intensity and pressure pain threshold.


Assuntos
Movimento , Cervicalgia , Postura , Amplitude de Movimento Articular , Humanos , Cervicalgia/fisiopatologia , Masculino , Feminino , Amplitude de Movimento Articular/fisiologia , Postura/fisiologia , Adulto , Pessoa de Meia-Idade , Movimento/fisiologia , Medição da Dor/métodos , Avaliação da Deficiência , Pescoço/fisiopatologia , Limiar da Dor/fisiologia , Fatores de Risco , Ombro/fisiopatologia , República da Coreia , Resistência Física/fisiologia , Pessoas com Deficiência , Rotação
4.
Medicine (Baltimore) ; 103(27): e38756, 2024 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-38968488

RESUMO

Physical exercise requires integrated autonomic and cardiovascular adjustments to maintain homeostasis. We aimed to observe acute posture-related changes in blood pressure, and apply a portable noninvasive monitor to measure the heart index for detecting arrhythmia among elite participants of a 246-km mountain ultra-marathon. Nine experienced ultra-marathoners (8 males and 1 female) participating in the Run Across Taiwan Ultra-marathon in 2018 were enrolled. The runners' Heart Spectrum Blood Pressure Monitor measurements were obtained in the standing and supine positions before and immediately after the race. Their high-sensitivity troponin T and N-terminal proB-type natriuretic peptide levels were analyzed 1 week before and immediately after the event. Heart rate was differed significantly in the immediate postrace assessment compared to the prerace assessment, in both the standing (P = .011; d = 1.19) and supine positions (P = .008; d = 1.35). Postural hypotension occurred in 4 (44.4%) individuals immediately postrace. In 3 out of 9 (33.3%) recruited finishers, the occurrence of premature ventricular complex signals in the standing position was detected; premature ventricular complex signal effect was observed in the supine position postrace in only 1 participant (11.1%). Premature ventricular complex signal was positively correlated with running speed (P = .037). Of the 6 individuals who completed the biochemical tests postrace, 2 (33.3%) had high-sensitivity troponin T and 6 (100%) had N-terminal proB-type natriuretic peptide values above the reference interval. A statistically significant increase was observed in both the high-sensitivity troponin T (P = .028; d = 1.97), and N-terminal proB-type natriuretic peptide (P = .028; d = 2.91) levels postrace compared to prerace. In conclusion, significant alterations in blood pressure and heart rate were observed in the standing position, and postexercise (postural) hypotension occurred among ultra-marathoners. The incidence of premature ventricular complexes was higher after the race than before.


Assuntos
Sistema Nervoso Autônomo , Pressão Sanguínea , Frequência Cardíaca , Corrida de Maratona , Peptídeo Natriurético Encefálico , Troponina T , Humanos , Feminino , Masculino , Sistema Nervoso Autônomo/fisiologia , Frequência Cardíaca/fisiologia , Corrida de Maratona/fisiologia , Adulto , Troponina T/sangue , Pessoa de Meia-Idade , Pressão Sanguínea/fisiologia , Peptídeo Natriurético Encefálico/sangue , Fragmentos de Peptídeos/sangue , Taiwan , Complexos Ventriculares Prematuros/fisiopatologia , Complexos Ventriculares Prematuros/diagnóstico , Hipotensão Ortostática/fisiopatologia , Postura/fisiologia
5.
Scand J Med Sci Sports ; 34(7): e14691, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38970442

RESUMO

Quantifying movement coordination in cross-country (XC) skiing, specifically the technique with its elemental forms, is challenging. Particularly, this applies when trying to establish a bidirectional transfer between scientific theory and practical experts' knowledge as expressed, for example, in ski instruction curricula. The objective of this study was to translate 14 curricula-informed distinct elements of the V2 ski-skating technique (horizontal and vertical posture, lateral tilt, head position, upper body rotation, arm swing, shoulder abduction, elbow flexion, hand and leg distance, plantar flexion, ski set-down, leg push-off, and gliding phase) into plausible, valid and applicable measures to make the technique training process more quantifiable and scientifically grounded. Inertial measurement unit (IMU) data of 10 highly experienced XC skiers who demonstrated the technique elements by two extreme forms each (e.g., anterior versus posterior positioning for the horizontal posture) were recorded. Element-specific principal component analyses (PCAs)-driven by the variance produced by the technique extremes-resulted in movement components that express quantifiable measures of the underlying technique elements. Ten measures were found to be sensitive in distinguishing between the inputted extreme variations using statistical parametric mapping (SPM), whereas for four elements the SPM did not detect differences (lateral tilt, plantar flexion, ski set-down, and leg push-off). Applicability of the established technique measures was determined based on quantifying individual techniques through them. The study introduces a novel approach to quantitatively assess V2 ski-skating technique, which might help to enhance technique feedback and bridge the communication gap that often exists between practitioners and scientists.


Assuntos
Postura , Análise de Componente Principal , Esqui , Esqui/fisiologia , Humanos , Masculino , Postura/fisiologia , Fenômenos Biomecânicos , Adulto , Movimento/fisiologia , Feminino , Adulto Jovem , Braço/fisiologia , Ombro/fisiologia , Rotação
6.
Pediatr Surg Int ; 40(1): 178, 2024 Jul 06.
Artigo em Inglês | MEDLINE | ID: mdl-38970642

RESUMO

PURPOSE: The study aimed to compare spinal posture, mobility, and position sense in adolescents with pectus excavatum (PE), pectus carinatum (PC), and healthy control (HC). METHODS: 22 with PE, 22 with PC, and 21 HC were included in the study. The spinal posture (thoracic kyphosis, lumbar lordosis, pelvic tilt, thoracic, lumbar, pelvic lateral tilt angles) and mobility (thoracic, lumbar, hip/sacral, and overall, in the sagittal and frontal plane) with the spinal mouse, and spinal position sense (repositing errors) with the inclinometer were assessed. RESULTS: The thoracic kyphosis angle of PE and PC was higher than in HC (p < 0.001; p = 0.001). Hip/sacral mobility in the sagittal plane was lower in the PE and PC than control, respectively (p < 0.001; p < 0.001). Overall sagittal spinal mobility (p:0.007) and hip/sacral mobility in the frontal plane (p:0.002) were lower in the PC than in HC. Overall frontal spinal mobility was lower in the PE and PC than in HC (p:0.002; p:0.014). The PE and PC repositing errors were higher (p < 0.001; p:0.014). CONCLUSION: The study found that adolescents with PE and PC had decreased spinal mobility, spinal alignment disorders, and a decline in spinal position sense. It is important not to overlook the spine during physical examinations of adolescents with chest wall deformities. In clinical practice, we suggest that adolescents with chest deformities should undergo a spine evaluation and be referred for physical therapy to manage spinal disorders.


Assuntos
Tórax em Funil , Pectus Carinatum , Postura , Humanos , Adolescente , Tórax em Funil/fisiopatologia , Tórax em Funil/complicações , Masculino , Pectus Carinatum/fisiopatologia , Feminino , Postura/fisiologia , Coluna Vertebral/anormalidades , Coluna Vertebral/fisiopatologia , Parede Torácica/anormalidades , Parede Torácica/fisiopatologia , Criança , Propriocepção/fisiologia , Estudos de Casos e Controles
7.
Sci Rep ; 14(1): 15238, 2024 07 02.
Artigo em Inglês | MEDLINE | ID: mdl-38956282

RESUMO

The vector forces at the human-mattress interface are not only crucial for understanding the distribution of vertical and shear forces exerted on the human body during sleep but also serves as a significant input for biomechanical models of sleeping positions, whose accuracy determines the credibility of predicting musculoskeletal system loads. In this study, we introduce a novel method for calculating the interface vector forces. By recording indentations after supine and lateral positions using a vacuum mattress and 3D scanner, we utilize image registration techniques to align body pressure distribution with the mattress deformation scanning images, thereby calculating the vector force values for each unit area (36.25 mm × 36.25 mm). This method was validated through five participants attendance from two perspectives, revealing that (1) the mean summation of the vertical force components is 98.67% ± 7.21% body weight, exhibiting good consistency, and mean ratio of horizontal component force to body weight is 2.18% ± 1.77%. (2) the predicted muscle activity using the vector forces as input to the sleep position model aligns with the measured muscle activity (%MVC), with correlation coefficient over 0.7. The proposed method contributes to the vector force distribution understanding and the analysis of musculoskeletal loads during sleep, providing valuable insights for mattress design and evaluation.


Assuntos
Leitos , Sono , Humanos , Sono/fisiologia , Masculino , Fenômenos Biomecânicos , Adulto , Feminino , Postura/fisiologia , Adulto Jovem , Imageamento Tridimensional/métodos
8.
Physiol Rep ; 12(13): e16034, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38949844

RESUMO

This study compared the joint kinematics between the front squat (FS) conducted in the upright (natural gravity) position and in the supine position on a short arm human centrifuge (SAHC). Male participants (N = 12) with no prior experience exercising on a centrifuge completed a FS in the upright position before (PRE) and after (POST) a FS exercise conducted on the SAHC while exposed to artificial gravity (AG). Participants completed, in randomized order, three sets of six repetitions with a load equal to body weight or 1.25 × body weight for upright squats, and 1 g and 1.25 g at the center of gravity (COG) for AG. During the terrestrial squats, the load was applied with a barbell. Knee (left/right) and hip (left/right) flexion angles were recorded with a set of inertial measurement units. AG decreased the maximum flexion angle (MAX) of knees and hips as well as the range of motion (ROM), both at 1 and 1.25 g. Minor adaptation was observed between the first and the last repetition performed in AG. AG affects the ability to FS in naïve participants by reducing MAX, MIN and ROM of the knees and hip.


Assuntos
Centrifugação , Exercício Físico , Articulação do Joelho , Amplitude de Movimento Articular , Humanos , Masculino , Amplitude de Movimento Articular/fisiologia , Fenômenos Biomecânicos , Adulto , Articulação do Joelho/fisiologia , Exercício Físico/fisiologia , Adulto Jovem , Articulação do Quadril/fisiologia , Postura/fisiologia , Gravidade Alterada
10.
Crit Care ; 28(1): 228, 2024 Jul 09.
Artigo em Inglês | MEDLINE | ID: mdl-38982466

RESUMO

BACKGROUND: Adjusting trunk inclination from a semi-recumbent position to a supine-flat position or vice versa in patients with respiratory failure significantly affects numerous aspects of respiratory physiology including respiratory mechanics, oxygenation, end-expiratory lung volume, and ventilatory efficiency. Despite these observed effects, the current clinical evidence regarding this positioning manoeuvre is limited. This study undertakes a scoping review of patients with respiratory failure undergoing mechanical ventilation to assess the effect of trunk inclination on physiological lung parameters. METHODS: The PubMed, Cochrane, and Scopus databases were systematically searched from 2003 to 2023. INTERVENTIONS: Changes in trunk inclination. MEASUREMENTS: Four domains were evaluated in this study: 1) respiratory mechanics, 2) ventilation distribution, 3) oxygenation, and 4) ventilatory efficiency. RESULTS: After searching the three databases and removing duplicates, 220 studies were screened. Of these, 37 were assessed in detail, and 13 were included in the final analysis, comprising 274 patients. All selected studies were experimental, and assessed respiratory mechanics, ventilation distribution, oxygenation, and ventilatory efficiency, primarily within 60 min post postural change. CONCLUSION: In patients with acute respiratory failure, transitioning from a supine to a semi-recumbent position leads to decreased respiratory system compliance and increased airway driving pressure. Additionally, C-ARDS patients experienced an improvement in ventilatory efficiency, which resulted in lower PaCO2 levels. Improvements in oxygenation were observed in a few patients and only in those who exhibited an increase in EELV upon moving to a semi-recumbent position. Therefore, the trunk inclination angle must be accurately reported in patients with respiratory failure under mechanical ventilation.


Assuntos
Insuficiência Respiratória , Humanos , Insuficiência Respiratória/fisiopatologia , Insuficiência Respiratória/terapia , Respiração Artificial/métodos , Mecânica Respiratória/fisiologia , Postura/fisiologia , Posicionamento do Paciente/métodos , Tronco/fisiopatologia , Tronco/fisiologia
11.
BMC Geriatr ; 24(1): 586, 2024 Jul 08.
Artigo em Inglês | MEDLINE | ID: mdl-38977995

RESUMO

OBJECTIVE: Through a randomized controlled trial on older adults with sarcopenia, this study compared the training effects of an AI-based remote training group using deep learning-based 3D human pose estimation technology with those of a face-to-face traditional training group and a general remote training group. METHODS: Seventy five older adults with sarcopenia aged 60-75 from community organizations in Changchun city were randomly divided into a face-to-face traditional training group (TRHG), a general remote training group (GTHG), and an AI-based remote training group (AITHG). All groups underwent a 3-month program consisting of 24-form Taichi exercises, with a frequency of 3 sessions per week and each session lasting 40 min. The participants underwent Appendicular Skeletal Muscle Mass Index (ASMI), grip strength, 6-meter walking pace, Timed Up and Go test (TUGT), and quality of life score (QoL) tests before the experiment, during the mid-term, and after the experiment. This study used SPSS26.0 software to perform one-way ANOVA and repeated measures ANOVA tests to compare the differences among the three groups. A significance level of p < 0.05 was defined as having significant difference, while p < 0.01 was defined as having a highly significant difference. RESULTS: (1) The comparison between the mid-term and pre-term indicators showed that TRHG experienced significant improvements in ASMI, 6-meter walking pace, and QoL (p < 0.01), and a significant improvement in TUGT timing test (p < 0.05); GTHG experienced extremely significant improvements in 6-meter walking pace and QoL (p < 0.01); AITHG experienced extremely significant improvements in ASMI, 6-meter walking pace, and QoL (p < 0.01), and a significant improvement in TUGT timing test (p < 0.05). (2) The comparison between the post-term and pre-term indicators showed that TRHG experienced extremely significant improvements in TUGT timing test (p < 0.01); GTHG experienced significant improvements in ASMI and TUGT timing test (p < 0.05); and AITHG experienced extremely significant improvements in TUGT timing test (p < 0.01). (3) During the mid-term, there was no significant difference among the groups in all tests (p > 0.05). The same was in post-term tests (p > 0.05). CONCLUSION: Compared to the pre-experiment, there was no significant difference at the post- experiment in the recovery effects on the muscle quality, physical activity ability, and life quality of patients with sarcopenia between the AI-based remote training group and the face-to-face traditional training group. 3D pose estimation is equally as effective as traditional rehabilitation methods in enhancing muscle quality, functionality and life quality in older adults with sarcopenia. TRIAL REGISTRATION: The trial was registered in ClinicalTrials.gov (NCT05767710).


Assuntos
Sarcopenia , Telerreabilitação , Humanos , Sarcopenia/fisiopatologia , Sarcopenia/reabilitação , Sarcopenia/terapia , Idoso , Masculino , Feminino , Pessoa de Meia-Idade , Postura/fisiologia , Imageamento Tridimensional/métodos , Qualidade de Vida , Aprendizado Profundo
12.
J Clin Hypertens (Greenwich) ; 26(7): 867-871, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38980266

RESUMO

Accurate arm circumference (AC) measurement is required for accurate blood pressure (BP) readings. Standards stipulate measuring arm circumference at the midpoint between the acromion process (AP) and the olecranon process. However, which part of the AP to use is not stipulated. Furthermore, BP is measured sitting but arm circumference is measured standing. We sought to understand how landmarking during AC measurement and body position affect cuff size selection. Two variations in measurement procedure were studied. First, AC was measured at the top of the acromion (TOA) and compared to the spine of the acromion (SOA). Second, standing versus seated measurements using each landmark were compared. AC was measured to the nearest 0.1 cm at the mid-point of the upper arm by two independent observers, blinded from each other's measurements. In 51 participants, the mean (±SD) mid-AC measurement using the anchoring landmarks TOA and SOA in the standing position were 32.4 cm (±6.18) and 32.1 cm (±6.07), respectively (mean difference of 0.3 cm). In the seated position, mean arm circumference was 32.2 (±6.10) using TOA and 31.1 (±6.03) using SOA (mean difference 1.1 cm). Kappa agreement for cuff selection in the standing position between TOA and SOA was 0.94 (p < 0.001). The landmark on the acromion process can change the cuff selection in a small percentage of cases. The overall impact of this landmark selection is small. However, standardizing landmark selection and body position for AC measurement could further reduce variability in cuff size selection during BP measurement and validation studies.


Assuntos
Braço , Determinação da Pressão Arterial , Humanos , Braço/anatomia & histologia , Masculino , Feminino , Determinação da Pressão Arterial/métodos , Determinação da Pressão Arterial/instrumentação , Determinação da Pressão Arterial/normas , Reprodutibilidade dos Testes , Pessoa de Meia-Idade , Adulto , Variações Dependentes do Observador , Pressão Sanguínea/fisiologia , Pontos de Referência Anatômicos , Idoso , Postura/fisiologia , Antropometria/métodos , Acrômio/anatomia & histologia
13.
J Bodyw Mov Ther ; 39: 209-213, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38876627

RESUMO

BACKGROUND: Posture is assessed clinically and used to guide treatment of low back pain. Collectively, the relevance of posture and clinical postural assessments have come under scrutiny. This study aimed to determine (a) the intra-rater and inter-rater reliability of visual assessments of lumbar lordosis, and (b) the agreement between visual and direct postural assessments. METHODS: Ten physiotherapists visually assessed the lumbar lordosis from 3D scans of 50 asymptomatic participants, and 15 duplicates, using a grading scale of deviations (range: 0 = normal to 3 = severe). Lumbar lordosis angle was directly assessed using the Vitus Smart 3D whole body scanner. Cohen's Kappa was used to determine the intra-rater and inter-rater reliability of visual assessments, with polyserial correlation (ps) used to determine the agreement between visual and direct assessments. RESULTS: Overall, 93% and 83% of all intra-rater and inter-rater differences in visual assessments were within a single grade point, respectively. The intra-rater and inter-rater reliability of visual assessments was moderate (κ (95%CI): 0.56 (0.45, 0.67)) and slight (κ (95%CI): 0.13 (0.08, 0.19)), respectively. The agreement between visual and direct assessments was moderate (ps = -0.41, p = 0.04). CONCLUSION: Visual assessments of lumbar posture demonstrated moderate repeatability and agreement with quantitative assessments. While agreement between assessors was slight, 83% of the visual ratings were within a single grade point, suggesting greater coherence among clinicians than our statistics suggested. As with any clinical assessments involving uncertainty, postural assessment should not solely guide treatment.


Assuntos
Lordose , Vértebras Lombares , Variações Dependentes do Observador , Postura , Humanos , Postura/fisiologia , Feminino , Vértebras Lombares/fisiologia , Vértebras Lombares/fisiopatologia , Masculino , Adulto , Lordose/fisiopatologia , Reprodutibilidade dos Testes , Adulto Jovem , Dor Lombar/fisiopatologia , Pessoa de Meia-Idade , Imageamento Tridimensional/métodos
14.
J Bodyw Mov Ther ; 39: 251-257, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38876635

RESUMO

OBJECTIVES: To verify the effectiveness of the use of a modified position of the Copenhagen Adduction (CA) stage 1 compared to the original position. DESIGN: Cross-sectional study. SETTING: Laboratory. PARTICIPANTS: 31 healthy men aged 23.7 ± 1.9 years with no recent or chronic general pathology. MAIN OUTCOME MEASURES: Differences between EMG amplitudes for the adductor longus (AL), rectus femoris (RF) and semi tendinous (ST) during dynamic contractions and adductor maximal isometric voluntary contraction (MIVC) force values between CA stage 1 standard and modified positions were assessed with either Wilcoxon or paired t-test. RESULTS: No significant differences were observed for EMG amplitudes of the AL (p-value = 0.724) and for the RF muscle (p-value = 0.337) and for the adductor force (p-value = 0.361) between the two positions. A significant difference was obtained for the ST (p-value<0.001) mainly explained by the adapted position of the non-dominant leg which unlocked the hip joint and generated less muscle activity in the hamstrings. CONCLUSIONS: Muscle activity of the AL muscle and adductor force being similar in both positions, the CA stage 1 modified position could be of interest for rehabilitation after adductor injury or strengthening of the adductors in elite athletes.


Assuntos
Eletromiografia , Contração Isométrica , Dinamômetro de Força Muscular , Músculo Esquelético , Humanos , Masculino , Eletromiografia/métodos , Estudos Transversais , Adulto Jovem , Adulto , Contração Isométrica/fisiologia , Músculo Esquelético/fisiologia , Postura/fisiologia , Articulação do Quadril/fisiologia , Músculo Quadríceps/fisiologia
15.
J Bodyw Mov Ther ; 39: 356-363, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38876652

RESUMO

The objective of this study is to evaluate the odds ratio of occurrence of pain, postural changes, and disabilities of violinists. Thirty-eight violinists were assessed. Photographs from anterior, posterior, and lateral views were taken and analyzed using Software of Postural Analysis. Pain was assessed by the Visual Analogue Pain Scale and the musculoskeletal disability of the arm, shoulder, and hand questionnaire (DASH). A logistic regression model was employed and all variables related to posture, age, gender, hours of practice, and duration of practice were considered. The results regarding the VAS and DASH were analyzed using multivariate techniques. The most important variables for the discrimination between the groups regarding the VAS scores were head and shoulder and thoracic kyphosis. For the DASH index, the key variables were the lateral spinal deviation and the head tilt. The odds ratio of occurrence pain was associated with the duration of the practice and the following postural variables: shoulder asymmetries, head postures, and lumbar lordosis. Scapular postures and thoracic kyphosis were associated with hours of practice, and the scapular postures with the duration of practice. This article provides new evidence of occurrence of pain, postural changes and disabilities in violinists. The odds ratio of occurrence pain was associated with the duration of the professional practice.


Assuntos
Música , Postura , Humanos , Masculino , Feminino , Adulto , Postura/fisiologia , Pessoa de Meia-Idade , Razão de Chances , Medição da Dor , Adulto Jovem , Cifose/epidemiologia , Cifose/fisiopatologia , Doenças Profissionais/epidemiologia , Doenças Profissionais/fisiopatologia , Dor/epidemiologia , Avaliação da Deficiência
16.
J Bodyw Mov Ther ; 39: 415-422, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38876661

RESUMO

OBJECTIVES: This cross-sectional study aimed to evaluate work-related stress and the efficacy associated with the newly developed Find My Stress mobile application. The global impact of the COVID-19 pandemic has significantly influenced the quality of life, transcending geographical boundaries and inducing stress that has detrimentally affected health and work efficiency. METHODS: A total of 440 male and female participants, comprising university students and adult workers, were enrolled in the study. Participants completed an assessment in the application that consisted of three components: 1) perceived work stress, 2) environmental stress factors, and 3) application efficiency. RESULTS: University students exhibited higher perceived stress levels compared to adult workers (p = 0.031). The predominant physical factors contributing to musculoskeletal disorders in university students were identified as movement and posture factors, particularly related to vibration and organization. Conversely, environmental factors took precedence in adult workers, followed by posture and movement. The reliability of the perceived work stress questionnaire was evaluated by Cronbach's alpha coefficient and yielded a value of 0.96. The Find My Stress application demonstrated high efficiency. CONCLUSIONS: Elevated levels of work stress were observed in both university students and adult workers. Initial signs of musculoskeletal disorders in university students primarily manifested in the neck and upper back, arms, and hands, while adult workers predominantly reported complaints related to the arms and hands. The Find My Stress application emerges as a valuable tool for screening occupational stressors.


Assuntos
COVID-19 , Doenças Musculoesqueléticas , Estresse Ocupacional , Estudantes , Humanos , Masculino , COVID-19/epidemiologia , COVID-19/psicologia , Feminino , Estudos Transversais , Adulto , Estudantes/psicologia , Universidades , Adulto Jovem , Estresse Ocupacional/epidemiologia , Estresse Ocupacional/psicologia , Doenças Musculoesqueléticas/psicologia , Doenças Musculoesqueléticas/epidemiologia , Aplicativos Móveis , SARS-CoV-2 , Pandemias , Postura/fisiologia , Qualidade de Vida
17.
J Bodyw Mov Ther ; 39: 544-549, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38876683

RESUMO

INTRODUCTION: Helicopter pilots may present chronic low back pain due to vibration exposure and asymmetric posture during flight. OBJECTIVES: To analyze the effects of a Pilates-based exercise program on low back pain of helicopter pilots of the Brazilian Air Force. METHODS: This is a randomized controlled trial with fifteen helicopter pilots of the Brazilian Air Force, who were assessed for pain intensity (Numerical Pain Rating Scale), disability associated with low back pain, and spine muscle endurance in three positions: trunk extension (Ito test) and left and right lateral bridge. Individuals were randomly distributed into the regular exercises group (REG) (n = 7), oriented to maintain their exercise routine, and Pilates group (PG) (n = 8), which performed an exercise program based on Pilates method twice a week for 12 weeks. Reassessments occurred after 6 and 12 weeks. Data were analyzed on SPSS 20.0 software using a significance level of 5%. RESULTS: PG showed a significant reduction in low back pain after 12 weeks of training compared with REG (mean difference of 3.5 points, p < 0.0001). We also observed increased endurance of trunk extensors (p = 0.002) and right (p = 0.001) and left lateral muscles (p = 0.001) in the PG compared with REG. However, the indexes of disability did not change between groups. CONCLUSION: Pain intensity was significantly reduced while spine muscle endurance increased in PG compared with REG after intervention; thus, Pilates-based exercises should be considered in physical conditioning programs for helicopter pilots.


Assuntos
Técnicas de Exercício e de Movimento , Dor Lombar , Militares , Humanos , Dor Lombar/reabilitação , Adulto , Masculino , Brasil , Técnicas de Exercício e de Movimento/métodos , Aeronaves , Medição da Dor , Pilotos , Terapia por Exercício/métodos , Postura/fisiologia
18.
J Bodyw Mov Ther ; 39: 565-571, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38876686

RESUMO

OBJECTIVES: The objectives were to compare forward head posture (FHP) in natural and corrected head postures between patients with nonspecific neck pain (NSNP) and controls and to clarify the relationship between natural and corrected head posture angle differences and deep cervical flexor function. This study aimed to provide useful evidence for postural assessment and treatment in patients with NSNP. METHODS: In this cross-sectional study, 19 patients with NSNP reporting a pain score of 3-7 for at least 3 months and 19 participants with no neck pain within the previous 12 months were recruited. To evaluate FHP, the cranial rotation and vertical angles were measured using lateral head and neck photographs. The craniocervical flexion test was used to evaluate deep cervical flexor activation and endurance. We evaluated the head and neck alignment in natural and corrected head postures and the relationship between the degree of change and deep cervical flexor function. RESULTS: FHP in the natural head posture did not differ between groups. In the corrected head posture, FHP was significantly smaller in the NSNP group than in the control group. In the NSNP group, the cranial rotation and vertical angles were significantly different between the natural and corrected head postures, and the angle difference correlated significantly with deep cervical flexor function. CONCLUSIONS: Patients with NSNP show hypercorrection in the corrected head posture, which may be correlated with deep cervical flexor dysfunction. Further investigation into the causal relationship between hypercorrection, deep neck flexor dysfunction, and neck pain is required.


Assuntos
Cabeça , Músculos do Pescoço , Cervicalgia , Postura , Humanos , Cervicalgia/fisiopatologia , Feminino , Estudos Transversais , Masculino , Músculos do Pescoço/fisiopatologia , Músculos do Pescoço/fisiologia , Adulto , Postura/fisiologia , Pessoa de Meia-Idade , Cabeça/fisiopatologia , Cabeça/fisiologia , Amplitude de Movimento Articular/fisiologia , Pescoço/fisiopatologia , Pescoço/fisiologia
19.
J Bodyw Mov Ther ; 39: 79-86, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38876705

RESUMO

BACKGROUND: Strengthening the hip and trunk muscles may decrease foot pronation in upright standing due to expected increases in hip passive torque and lower-limb external rotation. However, considering the increased pronation caused by a more varus foot-ankle alignment, subjects with more varus may experience smaller or no postural changes after strengthening. OBJECTIVE: To investigate the effects of hip and trunk muscle strengthening on lower-limb posture during upright standing and hip passive torque of women with more and less varus alignment. METHODS: This nonrandomized controlled experimental study included 50 young, able-bodied women. The intervention group (n = 25) performed hip and trunk muscle strengthening exercises, and the control group (n = 25) maintained their usual activities. Each group was split into two subgroups: those with more and less varus alignment. Hip, shank, and rearfoot-ankle posture and hip passive external rotation torque were evaluated. Mixed analyses of variance and preplanned contrasts were used to assess prepost changes and between-group differences (α = 0.05). RESULTS: The less-varus subgroup of the intervention group had a reduced rearfoot eversion posture (P = 0.02). No significant changes were observed in the less-varus subgroup of the control group (P = 0.31). There were no significant differences in posture between the control and intervention groups when varus was not considered (P ≥ 0.06). The intervention group had increased hip passive torque (P = 0.001) compared to the control group, independent of varus alignment. CONCLUSION: Despite the increases in hip passive torque, the rearfoot eversion posture was reduced only in women with a less-varus alignment. Having more foot-ankle varus may prevent eversion reductions.


Assuntos
, Força Muscular , Postura , Humanos , Feminino , Postura/fisiologia , Adulto Jovem , Força Muscular/fisiologia , Pé/fisiologia , Pronação/fisiologia , Torque , Tornozelo/fisiologia , Adulto , Fenômenos Biomecânicos/fisiologia , Articulação do Tornozelo/fisiologia , Músculo Esquelético/fisiologia , Terapia por Exercício/métodos
20.
Clin Biomech (Bristol, Avon) ; 116: 106269, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38861874

RESUMO

BACKGROUND: Slipped capital femoral epiphysis is a prevalent pediatric hip disorder. Recent studies suggest the spine's sagittal profile may influence the proximal femoral growth plate's slippage, an aspect not extensively explored. This study utilizes finite element analysis to investigate how various spinopelvic alignments affect shear stress and growth plate slip. METHODS: A finite element model was developed from CT scans of a healthy adult male lumbar spine, pelvis, and femurs. The model was subjected to various sagittal alignments through reorientation. Simulations of two-leg stance, one-leg stance, walking heel strike, ascending stairs heel strike, and descending stairs heel strike were conducted. Parameters measured included hip joint contact area, stress, and maximum growth plate Tresca (shear) stress. FINDINGS: Posterior pelvic tilt cases indicated larger shear stresses compared to the anterior pelvic tilt variants except in two leg stance. Two leg stance resulted in decreases in the posterior tilted pelvi variants hip contact and growth plate Tresca stress compared to anterior tilted pelvi, however a combination of posterior pelvic tilt and high pelvic incidence indicated larger shear stresses on the growth plate. One leg stance and heal strike resulted in higher shear stress on the growth plate in posterior pelvic tilt variants compared to anterior pelvic tilt, with a combination of posterior pelvic tilt and high pelvic incidence resulting in the largest shear. INTERPRETATION: Our findings suggest that posterior pelvic tilt and high pelvic incidence may lead to increased shear stress at the growth plate. Activities performed in patients with these alignments may predispose to biomechanical loading that shears the growth plate, potentially leading to slip.


Assuntos
Análise de Elementos Finitos , Pelve , Humanos , Masculino , Pelve/diagnóstico por imagem , Cabeça do Fêmur/diagnóstico por imagem , Cabeça do Fêmur/fisiopatologia , Estresse Mecânico , Escorregamento das Epífises Proximais do Fêmur/fisiopatologia , Escorregamento das Epífises Proximais do Fêmur/diagnóstico por imagem , Adulto , Simulação por Computador , Articulação do Quadril/fisiopatologia , Articulação do Quadril/diagnóstico por imagem , Fêmur/diagnóstico por imagem , Fêmur/fisiopatologia , Lâmina de Crescimento/diagnóstico por imagem , Lâmina de Crescimento/fisiopatologia , Lâmina de Crescimento/fisiologia , Cartilagem/diagnóstico por imagem , Modelos Biológicos , Fenômenos Biomecânicos , Postura/fisiologia , Coluna Vertebral/diagnóstico por imagem , Coluna Vertebral/fisiopatologia , Coluna Vertebral/fisiologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...