Explosive Leg Power and Flexibility in School Children Aged 6–8 Years

2021 ◽  
Vol 29 (2) ◽  
Author(s):  
Fidanka Vasileva ◽  
Andjel Vasilev ◽  
Raquel Font Llado ◽  
Georgi Georgiev
Keyword(s):  
First Graders ◽  
Second Graders ◽  
Statistical Parameters ◽  
Performance Technique ◽  
Lower Back ◽  
Hamstring Muscles ◽  
Long Jump ◽  
The Difference ◽  
Student’S T ◽  
Age And Sex

This pilot study has been carried out on a sample of 51 participants – children aged 6–8 years, pupils in grades 1 and 2 at Elementary School Dimkata Angelov-Gaberot in Vatasha, Kavadarci, Republic of North Macedonia. The main objectives were: 1) to assess explosive leg power and flexibility of lower back and hamstring muscles; 2) to compare these parameters by age and sex. Measurement of anthropometric characteristics (height, weight and BMI) and assessment of explosive leg power and flexibility of lower back and hamstring muscles were performed in the school. In order to examine whether data have a normal distribution, skewness and kurtosis values and Kolmogorov–Smirnov test were used. Basic mathematical and appropriate statistical methods were used to calculate descriptive statistical parameters. Student’s t-test was applied to test the difference between groups formed based on age and sex. Boys in grades 1 and 2 showed better results than girls in standing long jump (SLJ) test, while girls in Grade 1 performed better in flexibility test (FT). Second graders who have been involved in Physical Education classes longer than first graders, have shown better results in SLJ test than first graders. The reason for this outcome is that second graders have practiced more and have a better performance technique that influenced the jump distance.

scholarly journals Effectiveness of hamstring stretching using a pressure biofeedback unit for 4 weeks: A randomized controlled trial

2020 ◽  
Vol 40 (02) ◽  
pp. 99-107
Author(s):  
Jin-Oh Ahn ◽  
Jong-Hyuck Weon ◽  
Eun-Kyung Koh ◽  
Do-Young Jung
Keyword(s):  
Controlled Trial ◽  
Intervention Group ◽  
Knee Extension ◽  
Control Group ◽  
Post Intervention ◽  
Lower Back ◽  
Hamstring Muscles ◽  
Before And After ◽  
The Difference ◽  
Pressure Biofeedback

Background: Stretching and length test of hamstring muscles have been performed commonly to manage lower back pain (LBP) in sports rehabilitation. Previous literatures addressed that stretching techniques and length test of hamstring muscles should be performed with the pelvic maintained in an anterior tilt position. However, there is no study to determine the effectiveness of pressure biofeedback unit (PBU) to maintain in anterior pelvic tilting (APT) on length test and stretching of hamstring muscles. Objective: To determine the effectiveness of hamstring muscles stretching using a PBU. Methods: Forty participants with shortness of hamstrings randomized into two groups. Participants performed the active knee extension (AKE) stretching without (control group) or with PBU (intervention group) for four weeks. AKE tests without and with PBU were administered three times before and after hamstrings stretching by each group. Results: The AKE test without PBU showed a significant main effect of time ([Formula: see text]) but not of group ([Formula: see text]) on the AKE angle. The AKE test with PBU showed a significant increase in the AKE angle in the post-intervention compared to the pre-intervention assessments in both groups ([Formula: see text]). The difference of AKE angle between the pre- and post-intervention results was significantly greater in the intervention group than in the control group ([Formula: see text]). Conclusion: We recommend the use of a PBU to maintain the pelvic anterior tilting position when performing the AKE test or AKE stretching.

scholarly journals Effect Study of Aperture Distribution on the Capillary Pressure-Saturation Relation for the Single Fracture

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-13
Author(s):  
Yuan Wang ◽  
Chenglong Wu ◽  
Yuntian Zhou
Keyword(s):  
Capillary Pressure ◽  
Effect Study ◽  
Single Fracture ◽  
Saturation Curve ◽  
Static Displacement ◽  
Statistical Parameters ◽  
Dual Connectivity ◽  
Fluid Saturation ◽  
The Difference ◽  
Aperture Distribution

A systematic numerical method was presented to investigate the effect of aperture distribution on the relation of capillary pressure versus fluid saturation (P-S relation) for a single fracture. The fracture was conceptualized as a two-dimensional lattice-grid model and its aperture field was described by a probability distribution. Based on the invasion percolation theory, a program was developed to simulate the quasi-static displacement. The simulation was verified validly by comparisons of the experimental results. The effects of the statistical parameters were further quantified. The results show that the largest local aperture on the fracture boundary determines the AEV. The larger mean decreases the variation coefficient, which causes the more uniform aperture field, smoother air invasion front, and steeper capillary pressure-saturation curve (CPSC). The larger standard deviation increases not only the range but also the contrast degree of the apertures, thus providing a nondeterministic rule in the P-S relation. The larger correlation length causes a more homogeneous aperture field and a dual connectivity of the fracture. The increase of the difference and contrast degree between the small and large apertures results in dual-aperture fields. The dual-aperture field and dual connectivity of the fracture both contribute to the bimodal characteristic of the CPSC.

Body Stereotyping and Stigmatization of Obese Persons by First Graders

1995 ◽  
Vol 81 (3) ◽  
pp. 909-910 ◽  
Author(s):  
Amanda Goldfield ◽  
Joan C. Chrisler
Keyword(s):  
First Graders ◽  
Racially Diverse ◽  
Same Gender ◽  
The Difference

14 female and 15 male racially diverse first graders were individually interviewed after being shown a set of same-gender body silhouettes. More children were significantly less likely to want to befriend an endomorphic type. Although more children labeled the ectomorph the “good child,” the difference did not reach significance.

The Impact of Domestic Violence on Women’s Self-Attitude in Kazakhstan

2020 ◽  
pp. 77-83
Author(s):  
Zhanna Kalmatayeva
Keyword(s):  
Domestic Violence ◽  
Quantitative Research ◽  
Self Esteem ◽  
Self Report ◽  
Control Group ◽  
Personality Research ◽  
Attitude Test ◽  
The Difference ◽  
Student’S T ◽  
The Impact

The purpose of the article was to study the problems of domestic violence of women and its consequences in Kazakhstan. The analysis of the results of the study of self-attitude and self-esteem of women subjected to domestic violence. Revealed there is a correlation between the level of self-attitude of domestic violence victims and the non-differentiated I-concept. 140 women participated in the present study, 70 women are control group which not subjected to domestic violence and 70 women of them who have currently reported domestic violence in the Crisis Center "Umit" in Nur-Sultan in the period from November 2017 to October 2019. Quantitative research method was used in terms of survey model by implementing a psychological test “The self-attitude test questionnaire (SA)” that assesses self-relation, differentiated by self-esteem, self-sympathy, self-interest, and expectations of self-reliance of participants. Also, during the study was used personal questionnaire “Who am I?” a variant of non-standardized self-report, approaching the projective methods of personality research. Descriptive statistics were used to analyze the answers in terms of their levels of the participants’ self-esteem and self-relation and further, since it was revealed according to the results reflect the difference in the two groups by the values obtained from these scales, the Student's t-test for independent groups was used [2] was used to reveal whether there is any correlation between the components of the scale. The obtained results can be used to interventions and training of family for counselors in order to promote women's self-esteem and self-relation.

scholarly journals Evaluation of the effectiveness of self-massage in dysmenorrhea/ Ocena efektywności automasażu w redukcji bólu menstruacyjnego kobiet

2017 ◽  
Vol 11 (3) ◽  
pp. 26-32
Author(s):  
Anna Dobrzycka ◽  
Iwona Wilk
Keyword(s):  
Muscle Tension ◽  
Pain Scale ◽  
Quality Of Sleep ◽  
Menstrual Pain ◽  
Before And After ◽  
Average Pain ◽  
The Difference ◽  
Student’S T ◽  
Experimental Group

Background: Primary menstrual pain affects approximately 45-95% of women between 20-25 years of age. A non-invasive method in reducing menstrual pain by relaxing muscle tension is a massage. It brings the structural tension to normal levels and restores correct blood flow in the pelvic region. Aim of the study: The aim of this study was to test the usefulness of a self-massage in reducing the primary menstrual pain. Materials and methods: Out of 180 female students, 34 women aged 19-30 were qualified for the study with the use of a survey. Pittsburgh Sleep Quality Index questionnaire and visual analog pain scale (VAS) were used for the assessment before and after the therapy. Women in the experimental group performed tensegrity selfmassage a few days before the onset of bleeding for two menstrual cycles. Results were analyzed using Student’s t test and one-way analysis of variance (ANOVA). Results: Applying the self-massage statistically proved to significantly reduce the perception of pain (p=0.001) and the number of days with pain (p=0.007) in the experimental group. Within this group, the difference was noted in all participants except one. In addition, a third measurement was taken in order to assess the duration of the effect. The result of the average pain and number of days of pain after the extension was higher than in the second evaluation, but significantly lower than before the experiment. The significance was in accordance with the evaluation of pain, p=0.002 and number of days p=0.03. Evaluation of the quality of sleep in the experimental group was significantly better (p = 0.04) than before treatment. Conclusions: Self-massage reduces primary menstrual pain in women and can be used as an assisted form of self-therapy. It improves the quality of sleep.

scholarly journals Current trends in the prevalence of asthma-like symptoms in elementary school children

2021 ◽  
pp. 138-140
Author(s):  
Margarita K. Ermakova ◽  
Larisa P. Matveeva ◽  
Natalya R. Kapustina
Keyword(s):  
Elementary School ◽  
Comparative Study ◽  
Bronchial Asthma ◽  
School Children ◽  
Elementary School Children ◽  
First Graders ◽  
Number Of Children ◽  
Current Trends ◽  
Udmurt Republic ◽  
The Difference

Aim. To study the prevalence of bronchial asthma (BA) symptoms among elementary schoolchildren in the Udmurt Republic in the dynamics over 20 years. Materials and methods. A comparative study of the prevalence of BA was carried out. A questionnaire was administered to 2899 parents of first-graders, using the international standardized ISAAC program. Results. The prevalence of BA symptoms on the ISAAC program among elementary schoolchildren in the Udmurt Republic in 2020 was 7.70.2%, being significantly lower than in the previous studies of 2002 and 2009 (p0.001). Conclusion. There was a further downward trend in the prevalence of AD symptoms in younger schoolchildren. The difference between the current symptoms of the disease and the established diagnosis remained rather significant. Reliable (p10.001) increase in the number of children with dry cough, not related to cold, and children with bronchospasm connected with physical load was revealed.

Evaluation of brain iron content in Egyptian Patients with Sickle cell disease and its impact on Neurocognitive functions

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Mohsen Saleh Elalfy ◽  
Fatma Soliman Elsayed Ebeid ◽  
Mohammed Ahmed Samir Ibrahim ◽  
Hanaa Midhat Abdel Gader Hussein
Keyword(s):  
Iron Overload ◽  
Brain Mri ◽  
Healthy Controls ◽  
Brain Iron ◽  
Cell Disease ◽  
Neurocognitive Functions ◽  
The Difference ◽  
Mri Study ◽  
The Brain ◽  
Age And Sex

Abstract Background Sickle cell disease (SCD) is considered the most prevalent monogenic diseases worldwide. Iron overload is one of the major complications in those patients, especially who in need for frequent transfusion, affecting many organs including the brain. MRI is a valuable, reliable and non-invasive method for quantifying iron concentration in many organs as the liver and heart and it is now used for monitoring of the chelation therapy in SCD patients. Several studies began reporting differences in global cognitive function, particularly for children with SCD, they are at a high risk for neurocognitive impairment they often scored lower on general IQ measures than healthy children which is due to iron overload in brain tissue from the chronic transfusions which can lead to strokes and may be a silent stroke. Objective The current study assessed brain iron content (using R2* values) in the caudate and thalamic regions through quantitative brain MRI study in SCD patients in comparison to age and sex-matched healthy controls. Methods A case-control study recruited 32 patients with SCD and 11 healthy controls. Brain MRI study using multi-echo fast gradient echo sequence was done for all the patients and controls. Brain R2* values of both caudate and thalamic regions (right and left sides) were calculated for only 15 SCD patients and the 11 controls. All recruited SCD patients and controls were examined for the neurocognitive functions by these tests: Wechsler IV Intelligence Scale for Adult shows (Verbal, Perceptual, Memory, Processing and Total IQ), their all normal values between 90 – 110. Benton Visual Retention Test have cut of point at (> 4 or = 4). Those values are the same for the difference between the obtained correct and the expected correct, and the difference between the obtained error and expected error. Results The fifteen patient with SCD who underwent brain MRI were age and sex matched with the eleven healthy control (15 SCD patients: mean-age: 16.93 ± 3.41 years, 40.6% females and 11healthy controls: mean age: 18.73 ± 4.84 years, 54.5% females) were enrolled in the study. As regards the brain MRI, there was no statistically significant differences between SCD and control group in all regions of interests (p > 0.05). Our study showed that 72.7% of our SCD patients had under threshold TIQ scores. Also18% of the patients showed moderate anxiety, 9% mild anxiety and 9% showed severe anxiety. Conclusion The results of our study showed that even in cases of iron overload which affects vital organs as the liver, cardiac and brain iron overload don't occur.

Abstract 14520: Differences in Left Atrial Size and Function and Supraventricular Arrhythmias Between Blacks and Whites in the Atherosclerosis Risk in Communities (ARIC) Study: Implications for AF Pathogenesis

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Wendy Wang ◽  
Riccardo M Inciardi ◽  
Faye L Norby ◽  
Michael J Zhang ◽  
Jorge L Reyes ◽  
...  
Keyword(s):  
Risk Factors ◽  
Racial Differences ◽  
Left Atrial ◽  
Atherosclerosis Risk In Communities ◽  
Significant Difference ◽  
Blacks And Whites ◽  
The Difference ◽  
And Function ◽  
Aric Study ◽  
Age And Sex

Introduction: Black Americans have more atrial fibrillation (AF) risk factors but lower AF risk than whites. Left atrial (LA) enlargement, impaired LA function, frequent premature atrial contractions (PAC), and atrial tachycardia (AT) are risk factors for AF. Racial differences in LA size and function, PAC, or AT may exist that could explain the difference in AF risk. Hypothesis: Whites have higher PAC and AT frequency than blacks. Additionally, whites have larger LA size and lower LA function than blacks, which may contribute to the racial difference in AF. Methods: We included 1,623 ARIC participants free of AF who had 2D-echocardiograms at visit 5 (2011-2013) and wore a 2-week continuous heart monitor, the Zio ® XT Patch, at visit 6 (2016-2017). Weighted linear regression was used to analyze the association of race with LA size and function, as well as runs of AT per day and PAC per hour. Results: At visit 5, participants were 74 (4) years old, 58% were female, and 26% were black. AT runs were detected in 87% of blacks and 92% of whites, respectively (p=0.002). Among participants with >0 runs of AT per day (n=1480), blacks had 48% (95% CI: 21%-66%) fewer runs of AT per day than whites after adjustment for cardiovascular (CV) risk factors † . There was no significant difference in PAC frequency between blacks and whites. After adjusting for age and sex, blacks had greater LA size and lower LA function than whites; these differences attenuated after adjusting for CV risk factors (Table). Conclusion: Blacks have greater age and sex-adjusted abnormality in LA size and function than whites, likely due to higher prevalence of CV risk factors. Yet, blacks have lower propensity for AT. More research is needed to elucidate the mechanisms underlying the resistance to atrial arrhythmogenesis in blacks despite greater adverse LA remodeling.

Reversing Irreversible Sentences: Semantic and Syntactic Factors

1974 ◽  
Vol 6 (1) ◽  
pp. 99-110 ◽  
Author(s):  
Barbara A. Hutson ◽  
James Powers
Keyword(s):  
Sex Differences ◽  
First Graders ◽  
Semantic Content ◽  
Syntactic Form ◽  
Semantic Component ◽  
The Difference ◽  
Main Effects ◽  
Interaction Probability

Active and passive sentences were presented with probable and improbable semantic content to 100 first graders and 100 kindergarteners. An “irreversible” sentence was considered probable and its reverse was considered improbable. In a design employing syntax, probability, grade, and sex as factors, probability and syntax were found significant both as main effects and in their interaction. Probability had little effect on the comprehension of active sentences, but strongly affected comprehension of passive sentences. First graders responded correctly more often than kindergarteners; the difference was greatest on improbable sentences, with improbable passive sentences the most difficult. Sex differences were not found. The greater difficulty in comprehending less familiar sentences when syntactic form is not supported by semantic content suggests that the semantic component of grammar may play an important role in the child's acquisition of syntactic comprehension.

scholarly journals The Degree of Abstraction in Solving Addition and Subtraction Problems

2007 ◽  
Vol 10 (2) ◽  
pp. 285-293 ◽  
Author(s):  
Vicente Bermejo ◽  
Juan José Díaz
Keyword(s):  
Developmental Stage ◽  
Primary Education ◽  
First Graders ◽  
Fourth Grade ◽  
First Grade ◽  
Second Graders ◽  
School Grade ◽  
Levels Of Abstraction ◽  
Direct Modeling ◽  
Addition And Subtraction

In this study, the incidence of the degree of abstraction in solving addition and subtraction problems with the unknown in the first term and in the result is analyzed. Ninety-six students from first grade to fourth grade in Primary Education (24 students per grade) solved arithmetic problems with objects, drawings, algorithms, and verbal problems. The participants were interviewed individually and all sessions were video-taped. The results indicate a different developmental pattern in achievement for each school grade depending on the levels of abstraction. The influence of the level of abstraction was significant, especially in first graders, and even more so in second graders, that is, at the developmental stage in which they start to learn these arithmetic tasks. Direct modeling strategies are observed more frequently at the concrete and pictorial level, counting strategies occur at all levels of abstraction, whereas numerical fact strategies are found at higher levels of abstraction.

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