Search

Abstract: The purpose of this study was to determine the validity of using the electromyography (EMG) signal as a noninvasive method of estimating the lactate threshold (LT) power output in [...]

Copyright of Fisioterapia Brasil is the property of Atlantica Editora and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: The roping practice is a sporting the practitioner aims to throw a type of rope with a loop over the head or around the horns of the steer during the horse riding. The movement of looping is performed by repeated rotations of the shoulder above the shoulder girdle line, and this action, associated with changes in the thoracic spine, can overwhelm the structures of the shoulder complex and the muscles. Objective: Analyze the association between changes in increased thoracic curvature and the prevalence of pain in the shoulder complex in roping practitioners. Methods: The sample was intentionally with 20 male roping practitioners who were submitted to assessment of shoulder pain using the shoulder pain and disability index (spadi), three shouder's orthopedic test, the jobe's test, the yergason's test, the neer's test, and also the measurement of the thoracic curvature angle through the flexicurve method. The statistical data were processed using the SPSS version 20.0, and the Chi-Squared test was applied to evaluate the association between the variables. The level of significance adopted was 5%. Results: 70% of the sample presented pain in the shoulder joint complex and 45% of the practitioners presented hyperkyphosis. There is a moderate association between the variables (p = 0.008 / contingency coefficient = 0.510). Conclusion: The results showed a moderate association between the prevalence of pain in the shoulder complex and the increase of the thoracic curvature angle. [ABSTRACT FROM AUTHOR]

Background: Despite of the widespread use of Pilates in Physical Therapy, there are few studies that have assessed the muscle electrical activation during Pilates exercises. Objective: Verify the influence of different spring adjustments and individual positions on the electrical activation of multifidus (MU) and oblique external (OE) muscles during hip flexion-extension (HFE) exercise on the Cadillac. Methods: Eight women practicing Pilates exercises for at least six months performed 10 repetitions of HFE in the following situations: Lower Spring, spring fixed at 30 cm in relation to level which the individuals were positioned. Higher Spring, spring fixed at 90 cm in relation to level which the individuals were positioned. Near Position, distance of 10 cm from the fixed spring. Distant Position, distance of 30 cm from the fixed spring. Kinematic and eletromyographic data (EMG) were collected simultaneously and the MU and OE muscles were monitored. Each movement of HFE was splitted in two phases (extension and flexion). The EMG signal was calculated and normalized using the maximal voluntary contraction (MVC). The Wilcoxon test was used to investigate differences between the situations (psO.05). Results: MU muscle presented muscle activation values ranging from 10 to 20 % MVC, and the highest muscle activation in the lower spring and in the near position. OE muscles presented muscle activation values ranging from 20 to 45% MVC, and the highest values in the higher spring and in the distant position. Conclusion: MU and OE muscles presented a distinct electrical activation during different available spring adjustments and individual positions. [ABSTRACT FROM AUTHOR]

Introduction: Strawberry cultivation is an important source of income for Brazilian farmers. Cultivation can be done using the traditional model, in which producers must flex their trunk to handle seedlings, or using the hydroponic model, which involves an upright posture., Objectives: To verify the influence of cultivation model on posture and back pain prevalence among strawberry producers., Methods: A total of 26 strawberry producers who used traditional or hydroponic methods participated in the study. The angular values of the curvatures of the thoracic and lumbar spine in the sagittal plane were obtained using the "flexicurve" method, while pain prevalence was determined with Souza & Krieger's back pain questionnaire. The t -test for independent samples and the chi-square test were used to compare group results., Results: Growers using the traditional model had greater thoracic spine curvature (45.5 [SD, 26.2 ]) than those who used the hydroponic model (24.4 [SD, 10.3 ]). There was an association between thoracic spine classification and cervical pain, with a higher prevalence of thoracic kyphosis and cervical pain in the traditional model and a higher prevalence of normal curvature in the hydroponic model. Both groups reported a higher prevalence of pain in the lower back than in other locations., Conclusions: The cultivation model influenced posture and back pain prevalence in strawberry producers. Producers who use the traditional model have greater angulations of the thoracic spine, hyperkyphosis, lumbar straightening, and cervical pain than those who use the hydroponic model., Competing Interests: Conflicts of interest: None

Background: Despite of the widepread use of Pilates in Physical Therapy, there are few studies that have assessed the muscle electrical activation during Pilates exercises., Objective: Verify the influence of different spring adjustments and individual positions on the electrical activation of multifidus (MU) and oblique external (OE) muscles during hip flexion-extension (HFE) exercise on the Cadillac., Methods: Eight women practicing Pilates exercises for at least six months performed 10 repetitions of HFE in the following situations: Lower Spring, spring fixed at 30 cm in relation to level which the individuals were positioned. Higher Spring, spring fixed at 90 cm in relation to level which the individuals were positioned. Near Position, distance of 10 cm from the fixed spring. Distant Position, distance of 30 cm from the fixed spring. Kinematic and eletromyographic data (EMG) were collected simultaneously and the MU and OE muscles were monitored. Each movement of HFE was splitted in two phases (extension and flexion). The EMG signal was calculated and normalized using the maximal voluntary contraction (MVC). The Wilcoxon test was used to investigate differences between the situations (p < 0.05)., Results: MU muscle presented muscle activation values ranging from 10 to 20 % MVC, and the highest muscle activation in the lower spring and in the near position. OE muscles presented muscle activation values ranging from 20 to 45% MVC, and the highest values in the higher spring and in the distant position., Conclusion: MU and OE muscles presented a distinct electrical activation during different available spring adjustments and individual positions.