Publications by authors named "Giovanna M Amaral"
Are Previous Joint Injuries Associated with Muscle Performance in Volleyball Athletes?
Rev Bras Ortop (Sao Paulo)
February 2023
The aim of the present study is to determine whether previous shoulder and knee injuries were associated with isokinetic fatigue index and agonist/antagonist ratio of shoulder internal/external rotators and knee flexors/extensors in male volleyball athletes. The current study is a cross-sectional investigation of 49 male elite volleyball players competing at a high level in Brazil. Isokinetic fatigue index and agonist/antagonist profiles were assessed during the preseason.
View Article and Find Full Text PDFArticle Synopsis
- Traditional single-leg squat tests may not accurately assess lower limb alignment, prompting the evaluation of a new test called the 'precision-squat test' (PST) for better performance assessment.
- The study involved healthy participants and individuals who had ACL reconstruction, focusing on the test's reliability and its ability to predict performance based on musculoskeletal factors.
- Results indicated that PST showed excellent reliability, and performance tasks were influenced by difficulty and strength levels, with hip and knee strength linked to squat performance.
Study Design Controlled laboratory study, cross-sectional. Background Deficits in ankle proprioceptive acuity have been reported in persons with functional instability of the ankle. Passive stiffness has been proposed as a possible mechanism underlying proprioceptive acuity.
View Article and Find Full Text PDFAnatomical studies have shown structural continuity between the lumbopelvic region and the lower limb. The present study aimed to verify how simultaneous changes on knee/hip positions modify the ankle's resting position and passive torque. Thirty-seven subjects underwent an isokinetic assessment of ankle passive torque.
View Article and Find Full Text PDFBackground: Isokinetic dynamometry allows the measurement of several variables related to muscular performance, many of which are seldom used, while others are redundantly applied to the characterization of muscle function.
Objectives: The present study aimed to establish the particular features of muscle function that are captured by the variables currently included in isokinetic assessment and to determine which variables best represent these features in order to achieve a more objective interpretation of muscular performance.
Method: This study included 235 male athletes.
Background: Quick procedures with proper psychometric properties that can capture the combined alignment of the foot-ankle complex in a position that may be more representative of the status of the lower limb during ground contact are essential for assessing a large group of athletes.
Methods: The assessed lower limb was positioned with the calcaneus surface facing upward in a way that all of the marks could be seen at the center of the camera display. After guaranteeing maintenance of the foot at 90° of dorsiflexion actively sustained by the athlete, the examiner took the picture of the foot-ankle alignment.