Trunk and shoulder strength and mobility in young female volleyball and handball athletes.

Introduction: Volleyball and handball have typical overhead throwing motion that can generate adaptations in the athlete's kinetic chain predisposing to injuries and pain. Considering the importance of the trunk and shoulder in overhead throwing motion and the particularities of these action in different sports, this study aimed to compare the trunk and shoulder muscle strength and mobility in young female volleyball and handball athletes.

Design: Cross-sectional study with 70 female volleyball and handball athletes between 13 and 18 years old.

Stability, performance and upper and lower extremities range of motion in elite beach handball athletes: A cross sectional study.

Although beach handball is a popular sport worldwide, information about the functional profile in elite athletes are lacking. This study generate a descriptive profile of stability, performance and upper and lower extremities ROM in elite beach handball athletes. Secondary proposals were to compare these outcome measures between sexes and sides, and to report the frequency of athletes "at risk" according to cutoff values for shoulder ROM and dynamic postural stability of the lower extremities.

Center of pressure position in the touches of the star excursion balance test in healthy individuals.

Background: The Star Excursion Balance Test (SEBT) is a clinical test that aims to assess postural control. Its interpretation is related to the understanding of the motor specificities required. Adjustments must be made to the center of pressure (COP) to maintain balance during testing movements.

Shoulder Strength and Upper Body Field Performance Tests in Young Female Handball and Volleyball Athletes: Are There Differences Between Sports?

Context: Volleyball and handball players have usually been studied collectively as "overhead athletes," since throwing present similarities in the proximal to distal movement sequencing and upper limb joints ranges of motion. However, each sport presents specificities in the objectives when accelerating the ball and a variety of possible throwing techniques. Therefore, it is expected there may be differences in the shoulder and upper body physical performance between sports.

Scapular muscles weakness in subjects with traumatic anterior glenohumeral instability.

Objective: To investigate possible alterations on scapular muscle strength in subjects with traumatic anterior glenohumeral instability.

Design: Cross-sectional study.

Setting: Laboratory setting.

Anatomical glenohumeral internal rotation deficit and symmetric rotational strength in male and female young beach volleyball players.

Beach volleyball is a sport with a high demand of shoulder structures that may lead to adaptations in range of motion (ROM) and strength like in other overhead sports. Despite of these possible alterations, no study evaluated the shoulder adaptations in young beach volleyball athletes. The aim of this study was to compare the bilateral ROM and rotation strength in the shoulders of young beach volleyball players.

Shoulder rotator strength and torque steadiness in athletes with anterior shoulder instability or SLAP lesion.

Objectives: To investigate shoulder rotator strength and steadiness in athletes with anterior instability and superior labrum anterior posterior (SLAP) lesion.

Design: Cross-sectional laboratory study.

Methods: Athletes with anterior shoulder instability (instability group, n=10) and a SLAP lesion (SLAP group, n=10) were compared with healthy athletes matched by age, anthropometrics and sport (control group for shoulder instability, n=10 and control group for SLAP, n=10).

Shoulder internal and external rotations torque steadiness in overhead athletes with and without impingement symptoms.

Objectives: This study aimed to investigate torque steadiness of shoulder internal and external rotations in regularly training overhead athletes with and without impingement symptoms.

Design: Cross-sectional laboratory study.

Methods: Three groups were evaluated: athletes with impingement symptoms (n=21), asymptomatic athletes (n=25) and non-athletes (n=21).

Comparison of hip rotation range of motion in judo athletes with and without history of low back pain.

This study compared hip rotation range of motion in judo athletes with and without a history of low back pain. Forty-two athletes (22 males) were divided into two groups: 21 with history of low back pain (HLBP) and 21 without history of low back pain (Control). Internal and external hip rotation range of motion in active and passive movement were measured using computed photogrammetry.

Functional torque ratios and torque curve analysis of shoulder rotations in overhead athletes with and without impingement symptoms.

In this study, we evaluated the peak torque, functional torque ratios, and torque curve profile of the shoulder rotators in overhead athletes with impingement symptoms so as to examine possible alterations in response to sports training and shoulder pain. Twenty-one overhead athletes with impingement symptoms were compared with 25 overhead athletes and 21 non-athletes, none of whom were symptomatic for impingement. The participants performed five maximal isokinetic concentric and eccentric contractions of medial and lateral shoulder rotations at 1.

Isokinetic dynamometry applied to shoulder rotators - velocity limitations in eccentric evaluations.

The objectives of this study were to evaluate if collegiate overhead athletes, with and without shoulder pain, and non-athletes could reach a preset velocity in internal and external shoulder rotation isokinetic evaluations; and to evaluate the correlation between torque and velocity. Controlled laboratory study, cross-sectional. Evaluations were performed using the isokinetic dynamometer Biodex System 3.

Shoulder functional ratio in elite junior tennis players.

Objective: To evaluate shoulder rotation strength and compare the functional ratio between shoulders of elite junior tennis players.

Design: This cross-sectional study evaluated muscular rotation performance of 40 junior tennis players (26 male and 14 female) with an isokinetic dynamometer.

Main Outcome Measures: Strength variables of external (ER) and internal rotators (IR) in concentric and eccentric modes were considered.