• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 718
  • 172
  • 60
  • 57
  • 38
  • 38
  • 38
  • 38
  • 38
  • 38
  • 24
  • 22
  • 14
  • 9
  • 7
  • Tagged with
  • 1275
  • 1275
  • 372
  • 330
  • 291
  • 234
  • 192
  • 184
  • 154
  • 148
  • 146
  • 143
  • 125
  • 121
  • 112
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
491

The interrelationship of physical fitness, somatotype, body cathexis and personality in a group of white schoolboys

Fieldsend, Jeremy Rowell January 1980 (has links)
The evaluation of physical fitness is dependent upon the body and its capacity to generate requisite degrees of strength, speed, mobility and endurance, for effective physical performance. The physical properties of the body, and in particular the degree of muscularity and adiposity, are affected substantially by varying levels of physical fitness. This degree of muscularity and adiposity is closely related to the shape or physique of the body, which in turn, can influence the attitudes an individual adopts toward his body and himself (body cathexis). The purpose of this study was to investigate the reciprocal relationship between physical fitness, somatotype (physique) and body cathexis (satisfaction). A secondary objective was to examine the relationship between these variables and personality. The subjects who participated in this study were white schoolboys completing Standard Eight. Seventy seven subjects, all of whom were either 14 or 15 years of age, were studied. A total of 22 observations were made on each subject, which included a battery of physical fitness tests, anthropometric and somatotypological observations, and two questionnaires. Fleishman's Basic Fitness Test battery, which was slightly modified, was utilized to evaluate the subjects' level of physical fitness. Standardized anthropometric techniques and equipment were used to measure heights, mass, diameters, girths, and skinfolds. These basic anthropometric observations were then utilized to determine the subjects' Heath-Carter somatotype rating, absolute and relative body fat, and lean body mass. Body cathexis was measured by the Secord-Jourard Body Cathexis Scale and personality was assessed by the Howarth personality Questionnaire. The results indicated that physical fitness performance on the events which required the body mass to be displaced were highly and negatively related to the degree of excess adipose tissue. Significant differences in endomorphy (p < 0,005) were apparent in high and low fit groups, but no somatotypological differences were indicated for those events which did not involve the displacement of the body mass. The one exception to this was a static strength event, in which significant somatotypological differences between high and low fit groups were indicated for mesomorphy (p < 0,005) and ectomorphy (p < 0,01). Body cathexis was not closely related to physical fitness, somatotype, or personality. A number of weak relationships were apparent: there was a negative correlation between body cathexis and the personality trait of inferiority; high levels of adipose tissue negatively influenced the level of body cathexis; and good performance on the strength events was positively associated with body cathexis. In the physical fitness events requiring strength and the body mass to be displaced, the body cathexis levels of high fit subjects exceeded that of low fit subjects at a statistically significant level (p < 0,005). No significant differences in body cathexis were indicated for those events which did not require the displacement of the body mass. Personality was not related to physical fitness, somatotype or body cathexis. The only relationship that was discerned was the low correlation between inferiority and body cathexis . The findings of this investigation suggest that, in this context, dynamic physical fitness performance, is closely related to physique; and in particular a high endomorphic content is a limiting factor. Body cathexis is not closely related to physical fitness, somatotype or personality. It is likely, however, that feelings of inferiority and excess adipose tissue are associated with a low body cathexis, while strength is related to a high body cathexis. Personality is not related to physical fitness, physique or body.
492

Alleviating teacher stress : the efficacy of an exercise program

Jesson, Rachel Sharon 06 February 2012 (has links)
M.Phil. / This study examined the relationship between vocational stress and physical health and well being. To address this issue schoolteachers participated in a controlled physical exercise program for eight consecutive weeks. Two groups were established and subjects were classified as being part of a control group and an exercise group. The psychological parameters were assessed through the use of the Occupational Stress Inventory questionnaire which functioned as a pre and post-test and which showed the significant improvements made in Physical Strain, Role Overload, Psychological Strain, Interpersonal Strain and Vocational Strain scales. This suggests that the teachers experienced and reported fewer complaints about physical health issues, work-related issues, psychological disturbances, and less disruption in interpersonal relationships. Accordingly, the overall mental state of the teachers improved significantly. The physiological parameters were assessed by using the resting heart rate readings; recorded on a daily basis throughout the study. The results presented in this study show that the eight-week physical exercise program explained 56 per cent of the variance in the resting heart rate. This result demonstrates that the teachers contributed to their physical health by participating in the exercise program. Additionally, these results seem to suggest that prolonged participation in a program of physical exercise would result in the maintenance of effective coping skills to combat stress. The practical implications of these findings are reviewed with an eye to assisting teachers to better health and well being.
493

Does Physical Fitness Predict the Reading Achievement of Fifth-Grade Students? The Interaction with Gender

Lynn, Courtney 24 March 2016 (has links)
States across the nation are facing pressure to meet standards for high stakes testing which is resulting in a decrease in the amount of time allotted to physical education (Ennis, 2006). Although the U.S. Department of Health and Human Services (2008) recommends children engage in 60 minutes or more of physical activity a day, on average, children only receive 30 minutes per day of aerobic exercise (Epstein et al., 2001). Despite this decrease in physical activity, research has shown that physical activity is associated with academic achievement (Ardoy et al., 2013). In addition, physical activity is positively related to physical fitness (Rowlands, Eston, & Ingledew, 1999), which has also been shown to have a positive relationship with academic achievement (Castelli, Hillman, Buck, & Erwin, 2007). This study is the first to look at how gender moderates the relationship between physical fitness and reading achievement. Secondary data analyses were conducted with a total of 74, fifth-grade youth. All participants took the Fitnessgram (Plowman & Meredith, 2013) and Discovery Education (Discovery Education, 2014). The Fitnessgram is a standardized measure of physical fitness and activity levels used in schools. It is comprised of the Pacer (a measure of aerobic fitness), curl-ups, trunklift, flexed arm hang, and backsaver sit-and-reach. Discovery Education is a standardized, criterion-referenced assessment that measures students’ academic achievement in reading. The data were analyzed using regression analyses in order to determine the extent to which physical fitness predicts academic achievement and the extent to which gender moderates this relationship. No measure of physical fitness (i.e., Pacer, curl-ups, trunklift, flexed arm hang, and backsaver sit-and-reach) significantly predicted academic achievement. In addition, gender did not significantly moderate any of the relationships. However, the small sample size utilized in this study limited the ability to detect an interaction. When all physical fitness components were included as predictors of academic achievement, the model accounted for less than 4% of the variability in academic achievement. The limitations, implications of findings, and directions for future research are discussed.
494

The relationship between fitness, morphological characteristics, skills and performance in men's fast pitch softball

Wentzel, Melissa January 2012 (has links)
Magister Legum - LLM / An understanding of the structure, function and performance relationships in different sports, including softball, allows for improved coaching approaches, development of sport specific fitness and skills training programmes, team selections and talent identification in young players. Despite the fact that fast pitch softball is an established sport with a long history, it has received little scientific attention. It does for example, not have a specific battery of softball specific fitness tests and relies on the tests and norms of baseball. The specific morphological and fitness demands of the sport are therefore not fully understood. The purpose of this study was to establish whether morphological and fitness characteristics are related to skill and performance measures in men's fast pitch softball players and to determine what the strengths of any such relationships are. The sample was purposively selected and consisted of 15 Provincial and 15 club male fast pitch softball players. All participants were members of the provincial Softball Federation. Anthropometric, fitness and skills test and measurements were conducted at the training sites over a number of weeks because it coincided with team training. Anthropometric measurements included height, weight, skinfolds, and were done in accordance with ISAK specifications. Derived anthropometric variables included BMI and body fat percentage. The following physical fitness tests were conducted: vertical jump test, standing broad jump and the Illinois agility run while the skills tests conducted were the softball throw for distance, the two base sprint test, the batting tests and the fielding test. Match statistics were easier to obtain since records were available in printed form from the Provincial softball federation for the Provincial players and from the club for its members. The data obtained were analysed and interpreted both collectively as a group of thirty and then separately as provincial and club teams for the purpose of comparison. Since the data were not normally distributed, the Spearman's rank Correlation was used to test for associations between variables. Comparisons of the squads were done using the nonparametric Wilcoxon Rank Sum test. The results of the study identified a number of strong significant relationships between the different variables tested. Height and percent body fat, amongst others were found to be the two anthropometric variables which significantly interacted with two key performance areas of fast pitch softball i.e. batting and fielding. Percent body fat also negatively correlated with the vertical jump test which highlights the general negative impact of excess fat on performance. The relationships established in this research strongly suggest that coaches include fitness, morphological and skills tests in their coaching and fitness programmes and they should further be used in team selections processes as they are strong indicators for success and will make the selection process more objective.
495

Physical characteristics as performance indicators in surfing

Hayselden, Kirsten Jacqui-Anne January 2007 (has links)
The aim of this study was to identify indictors of performance in surfing. Therefore the objectives of the study were to determine the following: {u100085} Anthropometric measures such as: height, weight, body proportions; {u100085} Flexibility measures such as: back extension, hip flexion, ankle plantarflexion and dorsiflexion; {u100085} Core stability; {u100085} Dynamic balance; {u100085} Explosive leg power; {u100085} Which of the physical characteristics measured discriminate between elite and non-elite surfers. To achieve the aim and objectives of this study, the literature pertaining to excellence in surfing, and the theory surrounding talent identification and the many factors that can contribute to success in sport, were reviewed. Potential criteria important for performance in surfing were identified and appropriate tests to assess these criteria were selected. An ex post facto quasi experimental design was used to assess which of the identified criteria best discriminated between elite and non-elite surfboard riders. The test battery included a personal information questionnaire and the assessment of: anthropometric variables, flexibility, core stability, dynamic balance and explosive leg power. These abovementioned physical characteristics were identified from the literature as the factors most important to success in surfing. Fifty five (55) surfers were assessed of which 28 were elite surfers and 27 were non-elite surfers. The results obtained from the evaluation of the samples were compared in terms of their descriptive statistics and the differences tested for statistical and practical significance. The variables of height, age started surfing, core stability, dynamic balance, number of days surfed per week and number of hours surfed per day were found to most discriminate between the elite and non-elite participants. Finally, a stepwise discriminant analysis was used to determine classification functions that could be used for future prediction purposes. The variables included in the discriminant analyses included height, age started surfing, number of years surfing, core stability and dynamic balance. To verify the prediction model a jack-knife procedure was performed. The results from the jack-knife procedure indicated that 85.5 perecent of the entire sample was correctly classified while 92.9 percent of the elite sample and 77.8 percent of the non-elite sample were correctly classified. Thus, the discriminant functions obtained can be used for predictive purposes.
496

Cardiorespiratory fitness during pregnancy and its relationship to outcome

Wong, Susan Carol January 1985 (has links)
In order to determine the effects of aerobic fitness on pregnancy and the newborn 20 primigravid subjects were studied throughout their gestational period and immediately post-partum. The subjects were classified as trained (T=10) or untrained (UT=10) based on the heart rate response to submaximal cycle ergometry testing done in each trimester. Case room reports were reviewed after delivery. There was no difference between groups in the length of gestational period (T=40.75;UT=40.75 weeks) nor weight gained versus prepregnancy measures (T=13.92; UT=13.30 kgs). The first stage of labour was extended in the UT, 13hrs.58.8min. vs 1lhrs.18.Omin. UT had a longer second stage, 90.57 vs 70.0 mins. for T. Stage 3 was also prolonged in UT, 15.17 vs 7.43 mins. In both groups analgesia and/or anaesthesia was used equally. Two of the 10 T females had caesarean sections vs 3 of the 10 in the UT group. The mean apgar scores at 1 and 5 minutes were: T=7.70, 9.20; UT=7.90, 9.33, respectively. The birth weights of the T babies were marginally larger than the UT newborns (3733.00 vs 3679.97 gms). The T newborns were 8 males and 2 females, and the UT were 5 males and 5 females. All babies were healthy and without apparent abnormalities. There appears to be no positive or negative effects of maternal fitness on the newborn. The reduction in the active stage of labour in the T group may reflect their improved fitness levels. / Education, Faculty of / Curriculum and Pedagogy (EDCP), Department of / Graduate
497

Comparison of physical activity practices and dietary habits of health club members and community controls in Khayelitsha, Cape Town

Isaacs, Roshan January 2007 (has links)
Magister Public Health - MPH / Chronic diseases pose public health concerns globally with an increasing trend in developing countries. The development of interventions to minimize or prevent the burden associated with chronic diseases has therefore become a necessity. In 2002 the School of Public Health of the University of the Western Cape developed a health club intervention in Khayelitsha. This intervention focused on promoting healthy lifestyles, particularly improved diet and physical activity. The objectives of this study was to determine whether members were more physically active than non-members and to determine whether members made healthier dietary choices than non-members. / South Africa
498

Application of the social cognitive theory to an electronic activity monitor system-based Physical Activity Intervention for working adults

Tam, Ka Man 26 February 2020 (has links)
Adults in Hong Kong show relatively low participation in physical activity. In the wake of technological advancements, it has become necessary to promote physical activity in an innovative approach. To that end, this study aimed to investigate the effect of an application of Social Cognitive Theory (SCT) under an eight-week electronic activity monitor system (EAMS)-based intervention on changes in physical activity (PA) as well as its associated SCT constructs of self-efficacy, social support and self-regulation for working adults in Hong Kong. A series of studies were performed: Study 1: In order to assess the validity of the step count output of two popular electronic activity monitor system (EAMS) model, Fitbit Charge HR and Xiaomi Mi Band 2, healthy adult (N=30) worn both EAMS and walked at five predetermined speeds on a treadmill. Two-factor (step x speed) repeated measures ANOVAs was performed to compare the output of devices with manual step count. Result: there was no significant mean difference (p> 0.05) in step count among the Fitbit Charge HR and Mi Band 2 activity monitors and the criterion in all treadmill speeds. Both of them are valid devices for step count in the laboratory setting. Study 2: As to assess the validity of step measurement of Mi Band 2 in the free-living environment, 31 healthy adults were invited for wearing both Mi Band 2 and ActiGraph GT9X Link on their dominant hands wrist for 7 consecutive days. Paired sample t-tests and Pearson correlation were conducted to compare the average steps per day between Mi Band 2 and ActiGraph GT9X Link. Result: there was no significant mean difference (p >0.05) and high positive correlation in step count between the Mi Band 2 and Actigraph. The Mi Band 2 is a valid device for step count in the free-living environment. Study 3: To examine the validity and reliability of the Chinese version of PA related self-efficacy, self-regulation and social support in Hong Kong Chinese adults. There were 230 healthy adults aged 19-63 years recruited. The factorial validity of the scales was assessed by the Confirmatory Factor Analyses (CFA) while criterion validity was assessed by correlating measured constructs with self-reported PA. The internal consistency and scales test-retest reliability were evaluated by Cronbach's alpha and intraclass correlation coefficient, respectively. Result: indicators of CFA supported the one-factor structure while all PA correlates were significant (p<0.01) associated with self-reported PA. All scales demonstrated acceptable internal consistency and test-retest reliability. The results provided psychometric support for using the Chinese version of the scales to measure PA correlates among Hong Kong adults. Main Study: A two-armed randomised controlled trial took place to investigate the effect of an EAMS-SCT intervention on changes in PA and its associated SCT constructs for working adults in Hong Kong. Sixty-four (26 males, 38 females, mean age = 39.98, SD =7.06) participants were stratified based on their job nature and randomly assigned to the control, EAMS only group (n = 33) and the treatment, EAMS-SCT group (n =31) after data screening. Both groups received an EAMS, whereas the EAMS-SCT group received SCT elements in the eight-week intervention, which comprised of one physical activity advisory session conducted by a certified personal trainer and four WhatsApp delivered sessions conducted by the researcher. Outcome measures: Measures of PA (by IPAQ MET score) and SCTs constructs (by the scale of Exercise Self-efficacy, Social Support for Exercise and Physical Activity Self-regulation) of two groups at three times of measurement. 2 x 3 (Group x Time of Measurement) mixed ANOVA and mixed MANOVA were conducted respectively for PA and SCTs constructs for detecting group difference.Results: The interaction effect between different groups (EAMS only and EAMS-SCT) on the participants' score on IPAQ, across three times of measurement (pre-intervention, post-intervention and 4-week follow-up) was significant. The mean IPAQ MET scores of participants in both groups (EAMS only, from 957.64 to 1235.82, EAMS-SCT group from 883.49 to 1420.86) increased and statistically significant difference from its scores than that of the pre-intervention. However, there was no statistically significant difference in IPAQ MET scores between the groups. There was a statistically significant multivariate effect of SCT constructs across the interaction between the groups and time of measurement: F (6, 57) = 7.267, p = .000, with large effect size. Post-hoc analysis revealed that the score of exercise self-efficacy, social support for exercise and physical activity self-regulation from pre- intervention to post-intervention were significantly higher in the EAMS-SCT group. There was no significant difference in the score of physical activity self-regulation between the EAMS only group and the EAMS-SCT group. Meanwhile, there was a significant mean difference in exercise self-efficacy and social support for exercise at Week 8 and social support for exercise at Week 12 between EAMS only and EAMS- SCT group. Conclusion: The participants in the EAMS-SCT group show a significant increase in physical activity level and all three related SCT constructs. Both the EAMS only and the EAMS-SCT groups have an increase in the IPAQ MET score and the score of the scale of physical activity self-regulation after the 8-week intervention. Participants in the EAMS-SCT group exhibit higher scores in the scales of exercise self-efficacy and social support for exercise than participants in the EAMS only group after the 8-week intervention.
499

Painéis com partículas de madeira da espécie teca e casca de amendoim com adesivo à base de mamona /

Nasser, Silvia Marana. January 2019 (has links)
Orientador: Ivaldo de Domênico Valarelli / Banca: Marcus Antonio Pereira Bueno / Banca: Eduardo Carlos Bianchi / Banca: Luiz Dare Neto / Banca: Fransber Santade / Resumo: A sociedade atual está sendo obrigada a repensar seus conceitos e investir em novas alternativas de manejo dos recursos naturais e destino correto para os resíduos sólidos, a fim de minimizar os impactos negativos já em curso, evitando assim novos danos ao meio ambiente. Frente a essa realidade, a produção de painéis de partículas, a base de casca de amendoim (Arachis hypogaea L), resíduo da agroindustria, com madeira teca da espécie (Tectona grandis L. f.), utilizando-se como adesivo a resina poliuretana bicomponente a base de óleo de mamona (Ricinus communis L) na proporção de 12% da massa de partícula, divididos em cinco traços, conforme variação da porcentagem de casca de amendoim presente no painel, sendo: 0%, 10%, 20%, 30% e 100%, apresenta um caráter inovador, sustentável e econômico, uma vez que sua produção visa à redução do descarte, e agrega valor ao material desperdiçado nos processos de fabricação de bens de consumo Desta forma, este trabalho teve como objetivo, determinar a resistência mecânica através dos ensaios de resistência a flexão (MOR - módulo de ruptura e MOE- módulo de elasticidade), tração perpendicular, tração superficial, arrancamento de parafusos para topo e face, e dureza janka; e ensaios físicos dos painéis de partículas homogênea com 870,79 kg/m3, considerados painéis de alta densidade, em camada única, constituídos com Teca, partículas de casca de amendoim, ligados por resina PU, tendo como parâmetros as normas NBR ABNT 14810-2 (2013) e ANSI A2... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The current society is being forced to rethink its concepts and invest in new natural resource management alternatives and a correct destination for solid waste, in order to minimize the negative impacts already in progress, thus avoiding further damage to the environment. In the face of this reality, the production of particle boards, the base of peanut bark (Arachis hypogaea L), agroindustry residue, with teak wood of the species (Tectona grandis L. f.), using as adhesive the polyurethane resin bicomponent based on castor oil (Ricinus communis L) in the proportion of 12% of the particle mass, divided into five traits, according to the percentage of peanut hull present in the panel, being: 0%, 10%, 20%, 30% and 100%, presents an innovative, sustainable and economic character, since its production aims at the reduction of the waste, and adds value to the material wasted in the processes of manufacture of consumer goods. Thus, this work had as objective to determine the mechanical strength through the flexural strength tests (MOR - modulus of rupture and MOE - modulus of elasticity), perpendicular traction, surface traction, pulling of screws for top and face, and janka hardness; and physical tests, density, humidity, thickness swelling (24h) and water absorption (24h) of homogeneous particle board with 870.79 kg / m3, considered as high density panels, single layer, consisting of Teak, peanut shell particles, bound by PU resin, having as parameters the standards NBR ABNT 1481... (Complete abstract click electronic access below) / Doutor
500

Vliv pravidelné plavecké intervence na změny tělesné zdatnosti dětí ve věku 6-15 let / The effects of a swimming intervention on physical fitness in 6-15 years old children

Kučera, Patrik January 2015 (has links)
Thesis title: The effects of a swimming intervention on physical fitness in 6-15 years old children Thesis aims: The main aim of this thesis has been to explore the effects of regular swimming intervention on physical fitness in 6-15 years old children and focus on the importance of suitable nutrition for this age period. Methods: I've used in my thesis 2 research methods. The first one was the survey with 10 questions to ask the respondents about their leisure time physical activities and nutrition. For positive influence on physical fitness is the effect of healthy nutrition and other physical activities execpt of swimming very important. The second research method has been the standardized test baterry Unifittest 6-60. For the 6-15 years old children speifically these data and measurement: age, height, weight, long jump (from static position), sit-up 60s, Leger test. In the beginning of December I've taken the first primary of measuring. After 3 months of training intervention I've taken the secondary part of measuring. Subsequently I've evaluated the gained information. Results: We have compared the primary (entrance) measurement results and the results of secondary measurement after 13 weeks of surveillance. After 13 weeks of intervention we didn't found out statistical significant differences...

Page generated in 0.0422 seconds