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1.
PLoS One ; 15(7): e0235555, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32645111

RESUMO

The aim of the study was to compare the effects of a 10-week chest-press resistance training on lifting regions in a trained exercise and a none-trained exercise; the barbell bench press (BBP). Thirty-five resistance trained men with 4.2 (± 2.3) years of resistance training experience were recruited. The participants were randomized to attend a resistance program, performing the chest-press, twice per week using either, Smith machine, dumbbells or laying on Swiss ball using a barbell. A six-repetitions maximum (6RM) test was conducted pre- and post-training in the trained chest-press exercise and non-trained BBP to examine lifting velocity, load displacement and the time of the pre-sticking, sticking and post-sticking regions. Additionally, the muscle activity in pectoralis major, triceps brachii, biceps brachii and deltoid anterior was examined. In the post-test, all three chest-press groups decreased lifting velocity and increased the time to reach the sticking- and post-sticking region. Independent of the type of chest-press exercise trained, no differences were observed in vertical displacement or in the muscle activity for the three lifting regions. In general, similar changes in kinematics in trained exercise and those observed in the BBP were observed for all three groups. This indicates that none of the three chest-press exercises (Swiss ball, Smith machine or dumbbells) were specific regarding the lifting regions but displaced a transferability towards the non-trained BBP. However, improved strength altered the sticking region among resistance trained men.


Assuntos
Músculo Esquelético/fisiologia , Treinamento de Resistência/métodos , Fenômenos Biomecânicos , Humanos , Masculino , Tronco/fisiologia , Levantamento de Peso/fisiologia , Adulto Jovem
4.
Fa Yi Xue Za Zhi ; 36(2): 181-186, 2020 Apr.
Artigo em Inglês, Chinês | MEDLINE | ID: mdl-32530164

RESUMO

Abstract: Objective To study the mechanism of rib fracture caused by landing on different parts of the trunk using finite element method, and to provide some new techniques and new ideas for the reconstruction of the whole process of falls from height. Methods The finite element method was used to study the rib fracture of human security model THUMS4.0 caused by landing on different parts of the trunk. Then the model was compared with actual cases and the mechanism of rib fracture caused by falls from height was analyzed from a biomechanical point of view. Results There were some differences in the stress and strain distribution as well as the rib fracture sites when different parts touched the ground. Ribs on both sides of the body were fractured when the front of the trunk touched the ground, and the fractures were mainly located in the junction of the ribs and costal cartilage and the midaxillary line area. When the right anterior part of the trunk touched the ground, rib fracture occurred first on the side that touched the ground, and rib fractures were mainly located in the area from the right midaxillary line to the posterior axillary line, and junction of ribs on both sides and costal cartilage. When the back of the trunk touched the ground, the fracture sites were mainly located on the back of the ribs on both sides. When the right posterior part of the trunk touched the ground, multiple rib fractures were likely to occur in the parts that touched the ground. The plastic strains were mainly concentrated at the fracture sites, while the von Mises stresses were not only concentrated at the fracture sites, but also at other sites. Conclusion There are some differences in rib fracture location sites and injury mechanisms when different parts of the trunk touch the ground.


Assuntos
Fraturas das Costelas , Acidentes por Quedas , Fenômenos Biomecânicos , Análise de Elementos Finitos , Humanos , Fraturas das Costelas/etiologia , Costelas , Tronco
6.
J Surg Oncol ; 122(2): 283-292, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32363601

RESUMO

BACKGROUND: Locally advanced malignancies of the upper torso and shoulder girdle (UT-SG) necessitate extensive resection and complex reconstruction. Due to the infrequent nature of these operations, a global reconstructive algorithm has not been defined. METHODS: A retrospective review of all patients who received reconstructive surgery following malignant tumor extirpation in the UT-SG from 2008 to 2018 at the University of Texas MD Anderson Cancer Center. Factors predicting the need for flap reconstruction and risk for postoperative complications were evaluated. RESULTS: In total, 252 procedures met inclusion criteria. The most common pathology was sarcoma (76%) and 52% were primary tumors. The median defect area was 112 cm2 (range 4-1350 cm2 ). Reconstructive techniques included pedicled flaps (46%), local tissue rearrangement (38%), and free flaps (16%). On univariate analysis, the probability of needing a free flap increased 39% when the defect size increased by 100 cm2 . The strongest independent predictors of requiring a free flap were major vessel exposure (adjusted odds ratio [OR] = 4.92, 95% confidence interval [CI], 1.36-17.84, P = .015) and major peripheral nerve exposure (adjusted OR = 3.2, 95% CI, 1.1-9.2, P = .031). CONCLUSION: Despite the aggressive nature of their malignancies, patients requiring an UT-SG resection demonstrate high survival rates and therefore demand a durable reconstruction. Exposed critical structures and defect size were predictive of free tissue transfer.


Assuntos
Algoritmos , Procedimentos Cirúrgicos Reconstrutivos/métodos , Neoplasias de Tecidos Moles/cirurgia , Feminino , Retalhos de Tecido Biológico , Humanos , Masculino , Melanoma/cirurgia , Pessoa de Meia-Idade , Retalho Perfurante , Estudos Retrospectivos , Sarcoma/patologia , Sarcoma/cirurgia , Ombro/patologia , Ombro/cirurgia , Tronco/patologia , Tronco/cirurgia , Resultado do Tratamento
7.
J Electromyogr Kinesiol ; 52: 102423, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32416446

RESUMO

Faster trunk motions could be a strategy to prevent loss of balance and fall injuries due to unexpected perturbations. However, it is unclear how trunk sway velocities can be compensated during stepping in subjects with low back pain (LBP). The purpose of this study was to investigate lower limb reaction, swing, and step times, as well as trunk sway velocities at heel strike and toe-off, following repeated step perturbations between subjects with and without LBP. There were 30 subjects with LBP and 42 control subjects who were exposed to treadmill-induced perturbations at a velocity of 0.12 m/sec for 0.62 m. The treadmill-induced steps caused subjects to walk forward for 4.90 sec after the perturbation. The groups demonstrated significant interactions on the lower limb reaction times and on the number of repeated perturbations (F = 4.83, p = 0.03) due to a decreased step time at the first perturbation (t = 2.52, p = 0.01) in the LBP group. For the trunk sway velocities, the repeated perturbations demonstrated a significant interaction between groups (F = 4.65, p = 0.03). This adaptive trunk strategy for gait stability increased step times with repeated perturbations in the LBP group. The group interactions on the trunk sway velocities also indicated a possible somatosensory integration for step time adjustments to avoid potential fall hazards. This adaptive response with repeated step perturbations could result in compensatory trunk sway for gait stability.


Assuntos
Adaptação Fisiológica , Dor Lombar/fisiopatologia , Equilíbrio Postural , Tronco/fisiologia , Adulto , Fenômenos Biomecânicos , Feminino , Humanos , Masculino , Músculo Esquelético/fisiologia , Músculo Esquelético/fisiopatologia , Tempo de Reação , Tronco/fisiopatologia , Caminhada
8.
J Electromyogr Kinesiol ; 52: 102418, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32298966

RESUMO

Recent work suggests that kinematics-based electrical stimulation may restore dynamic trunk stability following spinal cord injury. However, to ensure fatigue-resistant control, knowledge of the relation between body motion and the activity of relevant muscles during non-impaired, unstable sitting may be beneficial. Therefore, our objective was to quantify the spatial and temporal relationships between (1) characteristic angular kinematics (i.e., the kinematics characterizing trunk stabilization) and (2) trunk and upper leg muscle activity in unstable sitting as elicited via a wobble board. Wobble board motion and bilateral electromyograms from fourteen trunk and upper leg muscles were recorded in fifteen non-disabled participants (i.e., individuals with no history of neurological or musculoskeletal impairments or pain, gait or balance difficulties, or use of a walking aid) sitting on a wobble board. The relationship between wobble board tilt and the electromyograms was quantified using cross-correlation analysis. During unstable sitting, the trunk was stabilized through direction-specific activation of the trunk and upper leg muscles, preceding wobble board displacement by 110-230 ms. Direction-specific activation implies the presence of active neural control, while preceding activation may be needed to account for known torque generation time delays. Furthermore, the specific muscles activated for each direction of wobble board displacement suggest the use of stiffness control in the anterior-posterior, but not medial-lateral direction. Future work will use the gained insights in defining the muscle stimulation patterns of kinematics-based neuroprostheses that can restore trunk stability following impairment.


Assuntos
Contração Muscular , Equilíbrio Postural , Postura Sentada , Adulto , Fenômenos Biomecânicos , Feminino , Humanos , Masculino , Músculo Esquelético/fisiologia , Tempo de Reação , Tronco/fisiologia
9.
Clin J Sport Med ; 30(3): 216-223, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32341288

RESUMO

OBJECTIVE: The purpose of this study was to evaluate injury characteristics by position groups. DESIGN: Prospective, observational study. SETTING: A single, major Division I collegiate football program. PARTICIPANTS: All players on a collegiate football program each fall regular season. INDEPENDENT VARIABLES: Exposure to Division I collegiate football and position groups. MAIN OUTCOME MEASURES: Injury rates (IRs) per 1000 athlete exposures (AEs) and injury rate ratios (IRRs) were calculated and analyzed for all monitored injury variables, which included time in the season, body part, type of injury, game and practice injuries, mechanism of injury, and type of exposure. RESULTS: During the 2012 to 2016 fall regular seasons, there were 200 reported injuries sustained from 48 615 AE. The overall 5-year IR was 4.11 per 1000 AEs (3.57-4.72 95% confidence intervals). Skill players sustained the highest IR in the preseason (IR, 7.56) compared with line (IR, 4.26) and other (IR, 4.10) position groups. In addition, skill players demonstrated a significantly higher IRR compared with the line (IRR, 1.75, P < 0.05) and other (IRR, 1.85, P < 0.05) position groups. CONCLUSIONS: Skill players sustained most of their injuries in the preseason, whereas the linemen and other position groups suffered most of their injuries in the first half of the regular season. Skill players demonstrated a significantly higher IR in preseason, noncontact mechanism injuries, and injuries to the upper leg and thigh compared with line and other position groups. Efforts to reduce soft-tissue muscle strains in skill players targeting the preseason may provide one of the best opportunities to significantly decrease current football IRs, whereas efforts to reduce contact exposures may have the greatest effect on concussions and contact mechanism injuries for the other position group. There were no significant differences in IRs between position groups and type of exposure.


Assuntos
Traumatismos em Atletas/epidemiologia , Futebol Americano/lesões , Concussão Encefálica/epidemiologia , Traumatismos Craniocerebrais/epidemiologia , Futebol Americano/fisiologia , Humanos , Extremidade Inferior/lesões , Masculino , Destreza Motora/fisiologia , Estudos Prospectivos , Fatores de Risco , Entorses e Distensões/epidemiologia , Tronco/lesões , Estados Unidos/epidemiologia , Extremidade Superior/lesões
10.
J Sports Sci ; 38(13): 1550-1559, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32292100

RESUMO

Knowledge of the kinematic differences that separate highly skilled and less-skilled squash players could assist the progression of talent development. This study compared trunk, upper-limb and racket kinematics between two groups of nine highly skilled and less-skilled male athletes for forehand drive, volley and drop strokes. A 15-camera motion analysis system recorded three-dimensional trajectories, with five shots analysed per participant per stroke. The highly skilled group had significantly (p < 0.05) larger forearm pronation/supination range-of-motion and wrist extension angles at impact than the less-skilled. The less-skilled group had a significantly more "open" racket face and slower racket velocities at impact than the highly skilled. Rates of shoulder internal rotation, forearm pronation, elbow extension and wrist flexion at impact were greater in the drive stroke than in the other strokes. The position of the racket at impact in the volley was significantly more anterior to the shoulder than in the other strokes, with a smaller trunk rotation angular velocity. Players used less shoulder internal/external rotation, forearm pronation/supination, elbow and wrist flexion/extension ranges-of-motions and angular velocities at impact in the drop stroke than in the other strokes. These findings provide useful insights into the technical differences that separate highly skilled from less-skilled players and provide a kinematic distinction between stroke types.


Assuntos
Destreza Motora/fisiologia , Esportes com Raquete/fisiologia , Tronco/fisiologia , Extremidade Superior/fisiologia , Adolescente , Fenômenos Biomecânicos , Cotovelo/fisiologia , Antebraço/fisiologia , Humanos , Masculino , Amplitude de Movimento Articular , Rotação , Ombro/fisiologia , Estudos de Tempo e Movimento , Punho/fisiologia , Adulto Jovem
11.
J Sports Sci ; 38(10): 1085-1095, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32281483

RESUMO

Fast bowling is categorised into four action types: side-on, front-on, semi-open and mixed; however, little biomechanical comparison exists between action types in junior fast bowlers. This study investigated whether there are significant differences between action-type mechanics in junior fast bowlers. Three-dimensional kinematic and kinetic analyses were completed on 60 junior male fast bowlers bowling a five-over spell. Mixed-design factorial analyses of variance were used to test for differences between action-type groups across the phases of the bowling action. One kinetic difference was observed between groups, with a higher vertical ground reaction force loading rate during the front-foot contact phase in mixed and front-on compared to semi-open bowlers; no other significant group differences in joint loading occurred. Significant kinematic differences were observed between the front-on, semi-open and mixed action types during the front-foot contact phase for the elbow and trunk. Significant kinematic differences were also present for the ankle, T12-L1, elbow, trunk and pelvis during the back-foot phase. Overall, most differences in action types for junior fast bowlers occurred during the back-foot contact phase, particularly trunk rotation and T12-L1 joint angles/ranges of motion, where after similar movement patterns were utilized across groups during the front-foot contact phase.


Assuntos
Esportes/classificação , Esportes/fisiologia , Adolescente , Fenômenos Biomecânicos , Humanos , Extremidade Inferior/fisiologia , Vértebras Lombares/fisiologia , Masculino , Pelve/fisiologia , Amplitude de Movimento Articular , Vértebras Torácicas/fisiologia , Estudos de Tempo e Movimento , Tronco/fisiologia , Extremidade Superior/fisiologia
12.
J Sports Sci ; 38(10): 1115-1123, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32223529

RESUMO

To maintain the accuracy of squash shots under varying conditions, such as the oncoming ball's velocity and trajectory, players must adjust their technique. Although differences in technique between skilled and less-skilled players have been studied, it is not yet understood how players vary their technique in a functional manner to maintain accuracy under varying conditions. This study compared 3-dimensional joint and racket kinematics and their variability between accurate and inaccurate squash forehand drives of 9 highly skilled and 9 less-skilled male athletes. During inaccurate shots, less-skilled players hit the ball with a more open racket, demonstrating a difference in this task-relevant parameter. No joint kinematic differences were found for accuracy for either group. Coordinated joint rotations at the elbow and wrist both displayed a "zeroing-in" effect, whereby movement variability was reduced from the initiation of propulsive joint rotation to a higher consistency at ball-impact; potentially highlighting the "functionality" of the variability prior to the impact that enabled consistent task-relevant parameters (racket orientation and velocity) under varying conditions. Further, highly skilled players demonstrated greater consistency of task-relevant parameters at impact than less-skilled players. These findings highlight the superior ability of highly skilled players to adjust their technique to achieve consistent task-relevant parameters and a successful shot.


Assuntos
Destreza Motora/fisiologia , Esportes com Raquete/fisiologia , Tronco/fisiologia , Extremidade Superior/fisiologia , Adulto , Fenômenos Biomecânicos , Cotovelo/fisiologia , Antebraço/fisiologia , Humanos , Masculino , Rotação , Ombro/fisiologia , Estudos de Tempo e Movimento , Punho/fisiologia , Adulto Jovem
13.
J Sports Sci Med ; 19(1): 84-94, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32132831

RESUMO

This technical report describes the design and implementation of a novel biofeedback system to reduce biomechanical risk factors associated with anterior cruciate ligament (ACL) injuries. The system provided objective real-time biofeedback driven by biomechanical variables associated with increased ACL injury risk without the need of a present expert. Eleven adolescent female athletes (age = 16.7 ± 1.34 yrs; height = 1.70 ± 0.05 m; weight = 62.20 ± 5.63 kg) from the same varsity high school volleyball team were enrolled in the experiment. Participants first completed 10 bodyweight squats in the absence of the biofeedback (pretest), 40 bodyweight squats while interacting with the biofeedback, and a final 10 bodyweight squats in the absence of the biofeedback (posttest). Participants also completed three pretest drop vertical jumps and three posttest drop vertical jumps. Results revealed significant improvements in squat performance, as quantified by a novel heat map analysis, from the pretest to the posttest. Additionally, participants displayed improvements in landing mechanics during the drop vertical jump. This study demonstrates that participants were able to interact effectively with the real-time biofeedback and that biomechanical improvements observed during squatting translated to a separate task.


Assuntos
Lesões do Ligamento Cruzado Anterior/prevenção & controle , Retroalimentação Sensorial/fisiologia , Voleibol/lesões , Adolescente , Lesões do Ligamento Cruzado Anterior/fisiopatologia , Fenômenos Biomecânicos , Estudos de Viabilidade , Feminino , Articulação do Quadril/fisiologia , Temperatura Alta , Humanos , Articulação do Joelho/fisiologia , Movimento/fisiologia , Condicionamento Físico Humano/métodos , Postura/fisiologia , Fatores de Risco , Software , Estudos de Tempo e Movimento , Tronco/fisiologia
14.
Aesthetic Plast Surg ; 44(3): 1102-1105, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32133555

RESUMO

Rhinoplasty is a sophisticated surgery that needs high technical skills with knowledge. The DR technique is a refined technique to deal with the selected cases which are challenging for rhinology (wide dorsum, base and humpy nose). Still, so many things are unknown and one life span will be never enough to solve it. However, the author thinks that any solution fills the gaps, is the only thing we can improve the medicine. LEVEL OF EVIDENCE V: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.


Assuntos
Rinoplastia , Medicina Baseada em Evidências , Nariz/cirurgia , Tronco
15.
Ergonomics ; 63(5): 593-606, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32216547

RESUMO

Musculoskeletal disorders are a prevalent disease in many Western countries. While a large number of ergonomic analyses and assessment methods are nowadays available, most current methods that assess exposure calculate overall risk scores of individual body segments without considering interaction effects of exposure variables. Therefore, a study was conducted that aimed at investigating and quantifying interaction effects of trunk inclination and arm lifting on ratings of perceived exertion (RPE) and muscle activity. A multiple regression model to predict musculoskeletal load under consideration of interaction effects was derived. The study revealed that there is a significant interaction effect of trunk inclination and arm lifting. Furthermore, final regression models explained variance in exposure variables in a range of R2 = 0.68 to R2 = 0.147 with a subset of two to three inputs. The predicative equations support the computer-based post-processing of sensor data. Practitioner summary: This article elaborates on the importance of interaction effects of working postures on assessment results of load. In practise, easy to-use-methods for an assessment of working postures are needed. Therefore, a regression model is derived, which facilitates the quantification of work load under consideration of interaction effects. The use of this regression model for the assessment of posture data gathered by range sensors is recommended. Abbreviations: RPE: rating of perceived exertion; MSD: musculoskeletal disorder; OWAS: ovako working posture analysing system; RULA: rapid upper limb assessment; LUBA: postural loading on the upper body assessment; REBA: rapid entire body assessment; OCRA: occupational repetitive action;S D: standard deviation; EMG: surface electromyography; LUT: left upper trapezius pars descendens; RUT: right upper trapezius pars descendens; LLT: left trapezius pars ascendens; RLT: right trapezius pars ascendens; LAD: left anterior deltoideus; RAD: right anterior deltoideus; LES: left erector spinae longissimus; RES: right erector spinae longissimus; SENIAM: surface electroMyoGraphy for the non-invasive assessment of muscles; MVC: maximum voluntary contraction; MANOVA: multivariate analysis of variance; ANOVA: analysis of variance; OLS: ordinary least squares; MANCOVA: multivariate analysis of covariance.


Assuntos
Ergonomia , Músculo Esquelético/fisiologia , Esforço Físico , Postura , Tronco/fisiologia , Extremidade Superior/fisiologia , Adulto , Eletromiografia , Feminino , Humanos , Masculino , Carga de Trabalho
16.
Nursing ; 50(4): 24-29, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32142014

RESUMO

Resuscitative endovascular balloon occlusion of the aorta (REBOA) has reemerged as a treatment for noncompressible torso hemorrhage. This article discusses indications and contraindications for REBOA, describes the procedure, and reviews nursing considerations for patients undergoing REBOA.


Assuntos
Aorta , Oclusão com Balão/métodos , Procedimentos Endovasculares/métodos , Hemorragia/enfermagem , Ressuscitação/métodos , Tronco/fisiopatologia , Humanos
17.
Am J Vet Res ; 81(3): 210-219, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32101042

RESUMO

OBJECTIVE: To develop a 3-D kinematic model to measure truncal motion in dogs and assess changes in truncal motion in dogs when wearing each of 2 service vests. ANIMALS: 5 adult mixed-breed dogs. PROCEDURES: 27 reflective markers were placed on the pelvis, trunk, and scapula of each dog. Six infrared cameras were placed around a treadmill to track the location of the markers within a calibrated space. Dogs were recorded during walking and trotting on the treadmill. Local and global coordinate systems were established, and a segmental rigid-body model of the trunk was created. Dogs were then recorded while wearing a custom vest and an adjustable vest during walking and trotting on the treadmill. Range of motion of the trunk when dogs were and were not wearing vests was compared by repeated-measures ANOVA. RESULTS: An anatomic coordinate system was established by use of markers located at T1, T13, and the xiphoid process. Range of motion of the trunk during a gait cycle did not differ significantly regardless of the day of the test for both walking and trotting gaits. Trunk motion of dogs when walking and trotting was significantly reduced when dogs were wearing a vest, compared with trunk motion when not wearing a vest. CONCLUSIONS AND CLINICAL RELEVANCE: A 3-D kinematic model for measuring truncal rotation was developed. Results indicated measurable differences in the gait of dogs when wearing each of the 2 service vests, compared with the gait when not wearing a vest.


Assuntos
Marcha , Tronco , Animais , Fenômenos Biomecânicos , Cães , Pelve , Caminhada
18.
NeuroRehabilitation ; 46(1): 95-108, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32039877

RESUMO

BACKGROUND: The effectiveness of trunk restraint on post-stroke arm motor function and daily function remain controversial. OBJECTIVE: To evaluate the effect of adding trunk restraint to task-oriented rehabilitation of arm motor function and functional ability after stroke. METHODS: Nine databases were systematically searched for randomized controlled trials studying the effects of trunk restraint in post-stroke task-oriented training. Researchers assessed methodological qualities using the Physiotherapy Evidence Database scale, and extracted data related to study participants, intervention, and outcomes. The overall effectiveness was calculated using a meta-analytic method. RESULTS: In total, ten articles met the inclusion criteria and nine trails (n = 255 subjects) were included in quantitative analyses. Meta-analysis revealed that trunk restraint exhibited a significant improvement on the Motor Activity Log-amount of use, 0.39 (95% CI: 0.25- 0.54), the Motor Activity Log-quality of movement, 0.45 (95% CI: 0.27- 0.63), the Fugl-Meyer Assessment (upper extremity), 1.09 (95% CI: 0.67- 1.51), Action Research Arm test, 4.51 (95% CI: 2.49- 6.54) and performance of Activities of daily living, 1.70 (95% CI: 0.19- 3.21) in trunk restraint group in patients at subacute stage, compared to the non-trunk restraint group, but no significant difference was found in patients with chronic stroke. CONCLUSIONS: Adding trunk restraint to task-oriented training may improve function in patients with subacute stroke.


Assuntos
Terapia por Exercício/métodos , Reabilitação do Acidente Vascular Cerebral/métodos , Tronco/fisiopatologia , Atividades Cotidianas , Humanos , Movimento , Recuperação de Função Fisiológica , Acidente Vascular Cerebral/fisiopatologia , Extremidade Superior/fisiopatologia
19.
Int J Sports Med ; 41(6): 419-423, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32045949

RESUMO

This study examined how the volume of trunk muscles and its bilateral asymmetry are related to club head speed in golfers. Fourteen right-handed male golfers performed five driver shots, and the club head speed for each trial was calculated from a three-dimensional reflective marker position of the club head immediately before impact. The volume of each side of the rectus abdominis, erector spinae, psoas major, quadratus lumborum, lateral abdominal wall muscle, and multifidus was determined using magnetic resonance imaging. For each muscle, the ratio of the larger to smaller side in muscle volume was calculated to assess bilateral asymmetry. The club head speed correlated positively with the volume of each side of the rectus abdominis and erector spinae, left quadratus lumborum, and the asymmetric ratio of the psoas major (r=0.595-0.747), but negatively with the asymmetric ratio of the quadratus lumborum (r=-0.641). Multiple regression analysis revealed that the right erector spinae volume and the asymmetric ratio of the psoas major were significant contributors for the club head speed (R2=0.797). These results indicate that the variation in the club head speed can be strongly explained by the absolute volume and bilateral asymmetry of specific trunk muscles.


Assuntos
Golfe/fisiologia , Músculo Esquelético/fisiologia , Equipamentos Esportivos , Tronco/fisiologia , Aceleração , Humanos , Masculino , Força Muscular/fisiologia , Músculo Esquelético/diagnóstico por imagem , Análise e Desempenho de Tarefas , Adulto Jovem
20.
Am J Surg ; 219(5): 823-827, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32029218

RESUMO

INTRODUCTION: Atypical lipomatous tumors or well-differentiated liposarcomas (ALT/WDLS) are low-grade soft tissue tumors that are commonly located on the trunk and extremities. There is no consensus on the best surgical approach for ALT/WDLS. METHODS: A systematic literature review of PubMed, Medline, Embase, Scopus, and google scholar was performed. All published studies on trunk or extremities ALT/WDLS with reported outcome data were considered and independently screened for inclusion by at least two of the authors. RESULTS: A total of eighteen studies comprising 793 patients with ALT/WDLS were included. 580 patients underwent marginal excision, with local recurrence observed in 69 (11.9%). 213 patients underwent wide excision with local recurrence in 7(3.3%). Recurrent tumors were successfully re-resected with marginal or wide excision. Dedifferentiation was confirmed in 9 patients (1.1%), and a distant pulmonary metastasis in 1 patient (0.1%). DISCUSSION: Marginal excision of truncal or extremities ALT/WDLS results in a slightly higher local recurrence rate. However, recurrences are almost always amenable to re-resection. The findings support the use of marginal excision for truncal or extremities ALT/WDLS.


Assuntos
Extremidades/patologia , Neoplasias Lipomatosas/cirurgia , Neoplasias de Tecidos Moles/cirurgia , Tronco/patologia , Humanos , Lipossarcoma/patologia , Lipossarcoma/cirurgia , Recidiva Local de Neoplasia/patologia , Neoplasias Lipomatosas/patologia , Neoplasias de Tecidos Moles/patologia
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