scholarly journals Relationship between propulsive force of the arm, body composition and isokinetic muscle strength indicators in surfers

2018 ◽  
Vol 20 (3) ◽  
pp. 342-351
Author(s):  
Sidarta Oliveira Geber ◽  
Bruno Remígio Cavalcante ◽  
Antonio Henrique Germano-Soares ◽  
Raysa Catarina Cavalcante Figueiredo Montes ◽  
Arthur Henrique Oliveira Silva ◽  
...  
Keyword(s):  
Body Composition ◽  
Internal Rotation ◽  
Fat Mass ◽  
Muscle Function ◽  
External Rotation ◽  
Pearson Correlation ◽  
Peak Torque ◽  
Total Work ◽  
Propulsive Force ◽  
Teres Major

This study aimed to evaluate the potential relationship between body composition (percentage of fat mass (FM %), fat mass and lean mass), muscle function (e.g., muscles; deltoid side and front, pectoralis major and teres major) and the propulsive force of the arm (PFA). Sixteen competitive surfers (29.1 ± 7.3 years; 1.72 ± 0.06 m; 74.2 ± 1.4 kg) were assessed for height, body mass, body composition (dual-energy-DXA), muscle function and PFA. Pearson correlation analyses were used to verify the relationship between all variables. An inverse correlations were found between PFA and isokinetic parameters to 60o/s: external rotation (peak torque: r = -0.71; p = 0.014; total work: r = -0.75; p = 0.007; power: r = -0.72; p = 0.011) and internal rotation (peak torque: r = -0.61; p = 0.045; total work: r = -0.73; p = 0.010; power: r = -0.61; p = 0.045) and 300o/s: external rotation (peak torque: r = -0.79; p = 0.003; total work: r = -0.84; p<0,001; power: r = -0.81; p = 0.002) and internal rotation (peak torque: r = -0.69; p = 0.017; total work: r = -0.72; p = 0.011; power: r = -0.69; p = 0.017). There was no significant correlation between body composition components and PFA (p>0.05). Although correlations do not imply cause and effect, PFA is not correlated with body composition in surfers and these relationships are inversely related to the parameters of muscle function.

Management strategies for shoulder reconstruction in obstetric brachial plexus injury with special reference to loss of internal rotation after surgery

2012 ◽  
Vol 37 (8) ◽  
pp. 772-779 ◽  
Author(s):  
M. Sibinski ◽  
T. E. J. Hems ◽  
D. A. Sherlock
Keyword(s):  
Soft Tissue ◽  
Brachial Plexus ◽  
Internal Rotation ◽  
External Rotation ◽  
Management Strategies ◽  
Shoulder Function ◽  
Obstetric Brachial Plexus ◽  
Teres Major ◽  
Shoulder Reconstruction

We assessed the outcomes in 24 of 25 children (mean age 3 years) who had soft-tissue shoulder reconstruction procedures for obstetric brachial plexus injuries. All had latissimus dorsi and teres major transfers to strengthen external rotation combined with subscapularis lengthening, reduction of posterior dislocation or subluxation, and humeral osteotomy, if necessary. At a mean follow-up of 3.8 years, the mean Mallet score improved from 12.3 preoperatively to 17.4 postoperatively, active external rotation improved from 21° to 32°, and passive external rotation improved from 26° to 67°. The shoulder remained in joint in all patients. Active internal rotation deteriorated in nine shoulders, two requiring secondary internal rotation osteotomy. Combined soft tissue rebalancing and bony procedures gives reliable shoulder function improvement. Care is required regarding the effect on internal rotation.

scholarly journals Reliability of Isometric and Eccentric Isokinetic Shoulder External Rotation

2016 ◽  
Vol 25 (2) ◽  
Author(s):  
Brianna M. Papotto ◽  
Thomas Rice ◽  
Terry Malone ◽  
Timothy Butterfield ◽  
Tim L. Uhl
Keyword(s):  
Repeated Measures ◽  
External Rotation ◽  
High Reliability ◽  
Peak Torque ◽  
Total Work ◽  
Isokinetic Testing ◽  
Deceleration Phase ◽  
Shoulder Muscles ◽  
Shoulder External Rotation ◽  
Average Angle

Context: Shoulder external rotators are challenged eccentrically throughout the deceleration phase of throwing, which is thought to contribute to overuse injuries. To evaluate the effectiveness of intervention programs, as well as identifying deficits, reliable and responsive measures of isometric and eccentric shoulder external rotation are necessary. Previously, isometric measures have primarily tested a single position, and eccentric measures have not been found to have high reliability. Objective: To examine the between-days reliability of multiple-angle isometric and dynamic eccentric isokinetic testing of shoulder external rotation. Design: Repeated measures. Participants: 10 healthy subjects (age 30 ± 12 y, height 166 ± 13 cm, mass 72 ± 10 kg). Main Outcome Measures: Average isometric peak torque of shoulder external rotation at 7 angles was measured. From these values, the angle of isometric peak torque was calculated. Dynamic eccentric average peak torque, average total work, and average angle of peak torque were measured. Results: Between-days reliability was high for average peak torque during isometric contractions at all angles (ICC ≥ .85), as it was for dynamic eccentric average peak torque (ICC ≥ .97). The estimated angle of isometric peak torque (ICC ≤ .65) was not highly reliable between days. The average angle of peak torque from the eccentric testing produced inconsistent results. Average total work of dynamic eccentric shoulder external rotation was found to be highly reliable between days (ICC ≥ . 97). Conclusion: Aspects of force such as peak torque and total work in isometric and eccentric testing of the shoulder external-rotator muscles can be measured reliably between days and used to objectively evaluate shoulder strength and identify changes when they occur. Angle measurements of peak torque could provide insight into the mechanical properties of the posterior shoulder muscles but were found to be inconsistent between days.

Asociación entre la composición corporal y la condición física en estudiantes de grado sexto, pertenecientes a la institución educativa moderna de Tuluá, Colombia año 2019 (Association between body composition and the physical condition in sixth grade st

Retos ◽  
2020 ◽  
pp. 539-546
Author(s):  
Luis Hebert Palma Pulido ◽  
Carlos Hernán Méndez Díaz ◽  
Alfonso Cespedes Manrrique ◽  
Jorge Andrés Castro Mejía ◽  
Alejandro Viveros Restrepo ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Composition ◽  
Body Mass ◽  
Fat Mass ◽  
Physical Condition ◽  
Pearson Correlation ◽  
Sixth Grade ◽  
The Body ◽  
Fat Percentage ◽  
Cardiovascular Capacity

 El siguiente estudio, tuvo como finalidad, determinar la correlación entre la composición corporal y la condición física en niños de sexto grado de la Institución Educativa de Tuluá, Colombia. El estudio fue no experimental, descriptivo y de alcance correlacional. La valoración de la composición corporal, se realizó mediante el índice de masa corporal y el porcentaje de grasa (fórmula de Slaughter y Lohmann). La condición física, se determinó por medio de la batería Fitnessgram. La muestra fue de 193 niños y niñas, entre ocho y 12 años. Los resultados se determinaron, por medio de estadísticos descriptivos y correlación de Pearson. Estos resultados, evidenciaron una r=-0,52 y -0,72 para niño y niña respectivamente, entre el porcentaje de grasa y la capacidad cardiovascular. Las correlaciones entre el índice de masa corporal y peso corporal, con el porcentaje de grasa fueron, r=0,59 niña 0,76 y niño y r=0,46 niña y 0,67 niño respectivamente, indicando que, a mayor masa corporal mayor grasa. La correlación entre masa grasa y el test de barra fija fue inversa, pero no alta, r=-0,23 y -0,24, sin embaro, cuando este test se correlacionó con el índice de masa corporal, dicha correlación fue mayor, r=-0,57 y -0,78, reflejando que, la masa corporal, afectó la resistencia en la barra. La flexibilidad y agilidad, no se alteraron por la masa grasa, r < 0,20. Como conclusión, se evidencia que, la masa grasa puede disminuir la capacidad cardiovascular y resistencia a la fuerza, sin embargo, la flexibilidad y la velocidad-agilidad pueden no alterarse.  Abstract. The following study aimed at determining the correlation between body composition and physical condition in sixth grade students from the high school Institución Educativa Moderna in Tuluá, Colombia. It was carried as a non-experimental, descriptive, and correlational study. The assessment of body composition was carried out using the body mass index and the fat percentage based on Slaughter and Lohmann formula. Physical condition was determined by using the Fitnessgram battery. The sample consisted of 193 boys and girls, around eight and 12 years old. The results were determined by means of descriptive statistics and Pearson correlation. These results showed r = -0.52 and -0.72 for boys and girls respectively, after correlating the percentage of fat and cardiovascular capacity. The correlation of their body mass index and their body weight, towards the percentage of fat were: r = 0.59 girl, 0.76 boy and r = 0.46 girl and 0.67 boy respectively, indicating that, the higher the body mass the higher the increase of fat. The correlation between fat mass and the fixed bar test was inverse, but not high: r = -0.23 and -0.24. However, when this test was correlated with the body mass index, that correlation was higher: r = -0.57 and -0.78, reflecting that the body mass affected the resistance at the bar. Flexibility and agility were not altered by fat mass: r <0.20. In conclusion, it is evidenced that fat mass can decrease cardiovascular capacity and resistance to strength, however, flexibility and speed-agility may not be altered.

scholarly journals Test-Retest Reliability of Isokinetic Arm Strength Measurements in Competitive Swimmers

2018 ◽  
Vol 65 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Daniel Collado-Mateo ◽  
Francisco J. Dominguez-Muñoz ◽  
Nuno Batalha ◽  
Jose Parraça ◽  
Pablo Tomas-Carus ◽  
...  
Keyword(s):  
Internal Rotation ◽  
External Rotation ◽  
Peak Torque ◽  
Motor Patterns ◽  
Retest Reliability ◽  
General Terms ◽  
Antagonist Muscles ◽  
Test Retest Reliability ◽  
Rotation Strength ◽  
Competitive Swimmers

Abstract Swimming motor patterns lead internal rotators to grow stronger than antagonist muscles, what may increase the risk of injury in swimmers. Injury prevention often involves the improvement of external rotators strength, as well as the external rotation/internal rotation ratio. The current research aimed to evaluate the test-retest reliability of shoulder concentric rotation strength in competitive swimmers using an isokinetic dynamometer. The study enrolled 35 competitive swimmers aged between 13 and 19 years. Concentric movements were performed including internal and external rotations of the shoulder joint following the instructions of the standardized protocol. The angular velocity of the test was defined at 60º/s. Outcome measures were peak torque (Nm) and work (J), measured in both, the dominant and non-dominant arms. The external rotation/internal rotation ratio was also calculated. Reliability was excellent for peak torque and work. For the external rotation/internal rotation ratio, the ICC oscillated between 0.744 and 0.860 for the work ratio of the non-dominant arm and the peak torque ratio of the dominant arm, respectively. In general terms, better reliability was observed for peak torque compared with work, for external rotation compared with internal rotation, and for the dominant arm compared with the non-dominant one.

scholarly journals Eating-Disordered Behavior in Adolescents: Associations with Body Image, Body Composition and Physical Activity

2020 ◽  
Vol 17 (18) ◽  
pp. 6665
Author(s):  
Eliška Štefanová ◽  
Peter Bakalár ◽  
Tibor Baška
Keyword(s):  
Physical Activity ◽  
Body Image ◽  
Body Composition ◽  
Body Fat ◽  
Fat Mass ◽  
Mental Health Problems ◽  
Pearson Correlation ◽  
Fat Free Mass ◽  
Body Fat Mass ◽  
Eating Disordered

Eating disorders (EDs) represent a disparate group of mental health problems that significantly impair physical health or psychosocial functioning. The aim of this study was to present some evidence about the prevalence of eating-disordered behavior (EDB) in adolescents, and explore its associations with body image (BI), body composition (BC) and physical activity (PA) in this age group. Data from 780 adolescents participating in a health behavior in school-aged children (HBSC) study conducted in Slovakia in 2018 were used (mean age 13.5 ± 1.3; 56% boys). Differences in mean values of numerical indicators were evaluated using the independent samples t-test. Differences between nominal variables were assessed by the chi-square test. Pearson correlation was used to describe the associations between all the selected variables. EDB was positively screened in 26.7% (208/780) of adolescents, with a higher prevalence in girls (128/344, 37.2%) than in boys (80/436, 18.3%). Significantly higher means of BI, body weight (BW), body mass index (BMI), body fat mass (BFM), body fat percentage (BFP), body fat mass index (BFMI), fat free mass index (FFMI), and SCOFF questionnaire score (SCOFF QS) were found in those positively screened for EDB. Pearson correlation analysis revealed positive associations between EDB and BI, BW, BMI, BFM, BFP and BFMI. The prevalence of EDB is high in Slovak adolescents. Positive associations between EDB, BI, BMI and fat-related body composition parameters support the idea of a more integrated approach in EDs and obesity prevention and treatment. At the same time, gender differences suggest the need for considering gender-specific strategies aimed at girls and boys separately.

scholarly journals Isokinetic performance of knee flexor and extensor muscles in community-dwelling elderly women

2015 ◽  
Vol 28 (3) ◽  
pp. 555-562 ◽  
Author(s):  
Diogo C. Felício ◽  
Daniele S. Pereira ◽  
Bárbara Z. de Queiroz ◽  
Alexandra M. Assumpção ◽  
João M. D. Dias ◽  
...  
Keyword(s):  
Muscle Function ◽  
Elderly Women ◽  
Descriptive Analysis ◽  
Age Groups ◽  
Peak Torque ◽  
Community Dwelling ◽  
Muscle Performance ◽  
Total Work ◽  
Isokinetic Dynamometer ◽  
Extensor Muscles

AbstractIntroduction The isokinetic dynamometer enables accurate assessment of muscle function. In Brazil, few studies have assessed the isokinetic muscle performance in older adults making interpretation and comparison of results with other studies.Objectives To conduct a descriptive analysis of the performance of the muscle flexor and extensor muscles of the knee joint in elderly community and compare the performance between the age groups 65-74 years and 75 years or more.Methods This is a cross sectional observational study with a convenience sample of 229 elderly community. For the analysis of muscle performance was used isokinetic dynamometer (Biodex System 3 Pro™) in the angular velocities of 60 °/s and 180 °/s. The variables evaluated were peak torque, peak torque normalized by body weight, total work normalized by body mass, total work, average power and agonist/antagonist ratio. Descriptive analysis was used to characterize the sample. For comparison between age groups was used Student's t-test with α = 0.05.Results The elderly women with older age showed a statistically significant decrease in most of the variables (p < 0.05) except for the agonist and antagonist knee (p = 0.398).Conclusions The isokinetic was a sensitive tool to characterize the modifications caused by aging on muscle function. Elderly with results below the lower limits of the confidence intervals for all variables certainly has a decreased strength for the age group evaluated and must be addressed therapeutically. The results can be used as a benchmark in clinical practice and future research.

The Effects of Jump-Rope Training on Shoulder Isokinetic Strength in Adolescent Volleyball Players

2010 ◽  
Vol 19 (2) ◽  
pp. 184-199 ◽  
Author(s):  
Irem Duzgun ◽  
Gul Baltaci ◽  
Filiz Colakoglu ◽  
Volga Bayrakci Tunay ◽  
Derya Ozer
Keyword(s):  
Training Program ◽  
Outcome Measures ◽  
External Rotation ◽  
Peak Torque ◽  
Total Work ◽  
Significant Difference ◽  
Shoulder Strength ◽  
Group 2 ◽  
Jump Rope ◽  
Group 1

Objective:To investigate the effect of a 12-wk weighted-jump-rope training program on shoulder strength.Design:Pretest to posttest experimental design.Setting:University sports physiotherapy laboratory.Participants:24 healthy volleyball players age 13-16 y.Intervention:Group 1 took weighted-rope training (n = 9), group 2 took unweighted-rope training (n = 8), and group 3 did not train with any specific program (n = 7).Main Outcome Measures:Players’ strength determined with an isokinetic dynamometer (Isomed 2000) at 180 and 60°/s on external and internal rotators, supraspinatus peak torque, and total work of the dominant shoulder. Kruskal–Wallis and Mann–Whitney U tests were used to determine the difference among the groups.Results:At pretraining evaluation, there were no significant differences in the test scores of the isokinetic test of full can and empty can between the groups at 60 and 180°/s. There was no statistically significant difference for 60 and 180°/s between pretraining and posttraining assessment (P > .05) except that total eccentric work increased in groups 1 and 3 but decreased in group 2 at 180°/s during the full can (P < .05). There was no significant difference among the groups between the pretraining and posttraining testing at both 180 and 60°/s for the empty can (P > .05). Internal-rotation values at 60 and 180°/s decreased for both peak torque and total work for all groups. External-rotation peak torque and total work at 60°/s increased for group 1. External-rotation peak torque and total work at 180°/s increased for all groups.Conclusions:The results indicate that a jump-rope training program is a good conditioning method for overhead athletes because of its potential benefits to shoulder strength.

scholarly journals Eccentric Hip Muscle Function in Females With and Without Patellofemoral Pain Syndrome

2009 ◽  
Vol 44 (5) ◽  
pp. 490-496 ◽  
Author(s):  
Rodrigo de Marche Baldon ◽  
Theresa Helissa Nakagawa ◽  
Thiago Batista Muniz ◽  
César Ferreira Amorim ◽  
Carlos Dias Maciel ◽  
...  
Keyword(s):  
Muscle Function ◽  
External Rotation ◽  
Pain Syndrome ◽  
Peak Torque ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Control Group ◽  
Hip Muscle ◽  
Hip Abduction ◽  
Torque Values

Abstract Context: Patellofemoral pain syndrome (PFPS) is a common knee condition in athletes. Recently, researchers have indicated that factors proximal to the knee, including hip muscle weakness and motor control impairment, contribute to the development of PFPS. However, no investigators have evaluated eccentric hip muscle function in people with PFPS. Objective: To compare the eccentric hip muscle function between females with PFPS and a female control group. Design: Cross-sectional study. Setting: Musculoskeletal laboratory. Patients or Other Participants: Two groups of females were studied: a group with PFPS (n  =  10) and a group with no history of lower extremity injury or surgery (n  =  10). Intervention(s): Eccentric torque of the hip musculature was evaluated on an isokinetic dynamometer. Main Outcome Measure(s): Eccentric hip abduction, adduction, and external and internal rotation peak torque were measured and expressed as a percentage of body mass (Nm/kg × 100). We also evaluated eccentric hip adduction to abduction and internal to external rotation torque ratios. The peak torque value of 5 maximal eccentric contractions was used for calculation. Two-tailed, independent-samples t tests were used to compare torque results between groups. Results: Participants with PFPS exhibited much lower eccentric hip abduction (t18  =  −2.917, P  =  .008) and adduction (t18  =  −2.764, P  =  .009) peak torque values than did their healthy counterparts. No differences in eccentric hip external (t18  =  0.45, P  =  .96) or internal (t18  =  −0.742, P  =  .47) rotation peak torque values were detected between the groups. The eccentric hip adduction to abduction torque ratio was much higher in the PFPS group than in the control group (t18  =  2.113, P  =  .04), but we found no difference in the eccentric hip internal to external rotation torque ratios between the 2 groups (t18  =  −0.932, P  =  .36). Conclusions: Participants with PFPS demonstrated lower eccentric hip abduction and adduction peak torque and higher eccentric adduction to abduction torque ratios when compared with control participants. Thus, clinicians should consider eccentric hip abduction strengthening exercises when developing rehabilitation programs for females with PFPS.

scholarly journals Body mass index, physical activity, and physical fitness of adolescence

2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Ratna Candra Dewi ◽  
Nanda Rimawati ◽  
Purbodjati Purbodjati
Keyword(s):  
Physical Activity ◽  
Body Mass Index ◽  
Body Composition ◽  
Physical Fitness ◽  
Body Mass ◽  
Fat Mass ◽  
Pearson Correlation ◽  
Moderate Physical Activity ◽  
Normal Body Mass Index ◽  
Mass Percentage

Background: Adolescents experience growth and significant changes in body composition which influence physical activity and response to sport or exercise. The level of physical fitness in adolescent girls is usually lower than that of boys, due to differences in body composition and levels of physical activity. The aim of this study was to examine the relationship between fat mass percentage, body composition, physical activity, and physical fitness.Design and Methods: This study used an analytical observational, and cross-sectional design with total samples consisting of 70 male and female students aged 14-15 years. They were selected through simple random sampling, and the data collected were anthropometric measurements, body composition, physical activity and physical fitness. In addition, the Pearson correlation test was used for data analysis.Results: The results showed that 68.57% of participants had a normal body mass index, 74.3% had moderate physical activity, and 44.28% had fat mass percentage including an obesity category and, 54.29% had low physical fitness. Furthermore, the Pearson test showed a significant relationship between physical activity, body mass index and fat mass percentage with physical fitness.Conclusions: An increased fat mass percentage is associated with decreased levels of physical fitness. Furthermore, a good determinant of low physical fitness in obese conditions is the percentage of fat mass rather than BMI.

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