School physical education (PE) programs are often viewed as one of the best and most effective ways to encourage children and youth to be physically active as they provide an environment ideal for the promotion of a healthy lifestyle. Due to the potentially powerful role that PE can play in the health of youth, attention needs to be given to ensure that these programs are as effective as possible. In Canada, recommendations have been made for daily physical education for students from kindergarten through grade 12 yet most high schools are not meeting this goal. At the high school level, physical education is frequently provided for students through one of two scheduling systems: (a) semestered physical education (PE class every day for half of the school year), and (b) non-semestered physical education (PE class every second day for the entire school year). To date, no research exists that investigates the influence of the scheduling of PE on the physical activity levels, participation rates, and experiences of high school students. Using a mixed methods research design, the purpose of this study was to investigate the effect that the scheduling of PE programs has on the subsequent physical activity levels and experiences of the students involved. This study was conducted in two phases. In phase one, Grade 9 students enrolled in two schools (n = 245), with one school offering semestered PE and one school offering non-semestered PE, completed an activity recall questionnaire. This questionnaire was administered three times (October, February, and May) throughout the school year. At the baseline data collection in October, the students in the two schools had comparable total physical activity levels. The most notable difference could be seen in May where students enrolled in non-semestered PE had significantly higher physical activity levels than baseline (p>.05) while students enrolled in the semestered PE program showed a trend of decreasing physical activity levels. It was also found that students enrolled in the non-semestered PE program showed significantly higher levels of participation in structured physical activity (p>.05), activities that had to be signed up or registered for, at school and away from the school. In the second phase of the study, students were organized into focus groups based on their gender and activity level. The focus group discussions explored the experiences of students in both types of PE programs. Common themes from the focus groups included the role that non-semestered PE played in the promotion of physical activity throughout the year. It was found that the non-semestered schedule fostered a continued interest in PE but that it interfered with the scheduling of other academic classes. Semestered PE appealed to those students who preferred to get PE over with and/or appreciated the familiar routine of the one-term class. Key decision-makers were also interviewed with many of the same themes emanating. Non-semestered physical education was seen as advantageous for encouraging physical activity levels in students, but being logistically difficult to schedule. Students and key decision-makers agreed that while semestered PE was more convenient for administration, non-semestered PE would encourage PA levels, enrollment in elective PE, and participation in intramural activities and school sports teams. In conclusion, this study provides support for the investigation into the effects of PE scheduling on the physical activity levels of students. The non-semestered PE program appeared to encourage students to be more involved in structured physical activities and was supported by most students and key decision-makers with the chief objection being the logistical inconveniences. However, with youth inactivity still a major problem in Canada, and changes being desperately needed, mere inconveniences should not discourage the implementation of possible physical activity-improving initiatives like non-semestered physical education.

School physical education (PE) programs are often viewed as one of the best and most effective ways to encourage children and youth to be physically active as they provide an environment ideal for the promotion of a healthy lifestyle. Due to the potentially powerful role that PE can play in the health of youth, attention needs to be given to ensure that these programs are as effective as possible. In Canada, recommendations have been made for daily physical education for students from kindergarten through grade 12 yet most high schools are not meeting this goal. At the high school level, physical education is frequently provided for students through one of two scheduling systems: (a) semestered physical education (PE class every day for half of the school year), and (b) non-semestered physical education (PE class every second day for the entire school year). To date, no research exists that investigates the influence of the scheduling of PE on the physical activity levels, participation rates, and experiences of high school students. Using a mixed methods research design, the purpose of this study was to investigate the effect that the scheduling of PE programs has on the subsequent physical activity levels and experiences of the students involved. This study was conducted in two phases. In phase one, Grade 9 students enrolled in two schools (n = 245), with one school offering semestered PE and one school offering non-semestered PE, completed an activity recall questionnaire. This questionnaire was administered three times (October, February, and May) throughout the school year. At the baseline data collection in October, the students in the two schools had comparable total physical activity levels. The most notable difference could be seen in May where students enrolled in non-semestered PE had significantly higher physical activity levels than baseline (p>.05) while students enrolled in the semestered PE program showed a trend of decreasing physical activity levels. It was also found that students enrolled in the non-semestered PE program showed significantly higher levels of participation in structured physical activity (p>.05), activities that had to be signed up or registered for, at school and away from the school. In the second phase of the study, students were organized into focus groups based on their gender and activity level. The focus group discussions explored the experiences of students in both types of PE programs. Common themes from the focus groups included the role that non-semestered PE played in the promotion of physical activity throughout the year. It was found that the non-semestered schedule fostered a continued interest in PE but that it interfered with the scheduling of other academic classes. Semestered PE appealed to those students who preferred to get PE over with and/or appreciated the familiar routine of the one-term class. Key decision-makers were also interviewed with many of the same themes emanating. Non-semestered physical education was seen as advantageous for encouraging physical activity levels in students, but being logistically difficult to schedule. Students and key decision-makers agreed that while semestered PE was more convenient for administration, non-semestered PE would encourage PA levels, enrollment in elective PE, and participation in intramural activities and school sports teams. In conclusion, this study provides support for the investigation into the effects of PE scheduling on the physical activity levels of students. The non-semestered PE program appeared to encourage students to be more involved in structured physical activities and was supported by most students and key decision-makers with the chief objection being the logistical inconveniences. However, with youth inactivity still a major problem in Canada, and changes being desperately needed, mere inconveniences should not discourage the implementation of possible physical activity-improving initiatives like non-semestered physical education.

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Public school physical educators have the opportunity to help students understand the importance of engaging in regular physical activity in order to combat America's obesity problem. However, students are often unmotivated to participate in their physical education classes. Providing students with an autonomy supportive environment increases intrinsic motivation. Self-determination theory states that higher levels of intrinsic motivation should lead to an increase in behavior, or higher activity levels in a physical education class. This study examined (a) the effects of increased autonomy on self-determination, and (b) the effects of increased autonomy on physical activity levels. Seventh and eighth grade girls (n = 122) in four classes participated in two fitness units (one allowing choice of activities, the other no choice). The 14-item abridged Situational Motivation Scale (SIMS) was administered pre and post each unit. Pedometers were used to measure step counts during both units. Results of the SIMS data showed there was a significant difference in motivation between the trials for all students, and between the groups (pre and post) during the second unit. There was no significant difference in step counts for all students between Unit 1 and Unit 2, and no difference between groups. The results revealed that increased autonomy in activity selection increases student self-determination, and therefore, should be implemented into the physical education curriculum. To truly determine the relationship between increased autonomy and activity levels, students need to be in an environment where they can be responsible for their own behavior, and where they can choose how much effort they are willing to put into the activities they have chosen.

Title: Habitual physical activity of Portuguese university students in the period of summer holidays Aim of the study: The aim of study is to evaluate habitual physical activity of Portuguese university students and to find out if they are meeting physical activity recommendations and could be seen as a sample of active population. Methods: Sample of the study was made of Portuguese university students, exactly students of physical education and sport sciences faculty. Sample size was 125 respondents, 81males and 44females. The sample refers to young adult age group from 18 years old, both genders. Instrument used was International physical activity questionnaire (IPAQ), long version. Data were collected electronically by Google Docs and then analyzed in Microsoft Excel 2007 and IBM SPSS Statistics 20. Results: Physical activity and sport scientist's students can be seen as a sample of active population. 122 (97.6%) respondents are meeting physical activity recommendations from which 87 (69.6%) are over-meeting these recommendations. PAL of the sample was high in 69,6%, moderate in 28% and low in 6,8% of the cases. No statistical significance was found between total physical activity score and academic year. The habitual physical activity of the sample is not influenced by their study curriculum....

In this research a heuristic algorithm is developed for searching and identifying preferred actions as applied to the bus route design problem. The search routine evaluates each subsequent segment added to the route in the context of the value of that segment and also the value of future decisions and opportunities for subsequent segments. The total overall maximum accessibility of the system is calculated using a minimum path network between each node pair and adding the accessibility of all route segments. This is equivalent to assuming that there was a direct shortest path route between every two destinations in the network. The quality of the designed network is obtained by comparing the share of the total benefits obtained from the heuristic with the share of the costs incurred with respect to a minimum path network. Several test cases and network scenarios are studied to evaluate the analytical tool developed. In addition, different performance measures are used to identify the connecting routes that increase the accessibility of the system.

Title from PDF of title page. / Document formatted into pages; contains 92 pages. / Thesis (M.S.I.E.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: In this research a heuristic algorithm is developed for searching and identifying preferred actions as applied to the bus route design problem. The search routine evaluates each subsequent segment added to the route in the context of the value of that segment and also the value of future decisions and opportunities for subsequent segments. The total overall maximum accessibility of the system is calculated using a minimum path network between each node pair and adding the accessibility of all route segments. This is equivalent to assuming that there was a direct shortest path route between every two destinations in the network. The quality of the designed network is obtained by comparing the share of the total benefits obtained from the heuristic with the share of the costs incurred with respect to a minimum path network. Several test cases and network scenarios are studied to evaluate the analytical tool developed. / ABSTRACT: In addition, different performance measures are used to identify the connecting routes that increase the accessibility of the system. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Various research studies have indicated that the prevalence of overweight and obesity among children and adolescents has increased worldwide and has, therefore, become a serious health problem. Besides the various health implications of childhood obesity, it can also have psychological consequences for these children and they have a greater risk than a normal weight child to suffer from poor self perception. The effect of a physical activity, diet and behaviour modification intervention on the total energy expenditure, physical activity levels and self perception of 9 to 12 year old overweight and obese children is, however, not clear. The aim of the study was firstly to determine the effect of a physical activity, diet and behaviour modification intervention on the total energy expenditure and physical activity levels of 9 to 12 year old overweight and obese children. Secondly, to determine the effect of such an intervention on the self perception, and more specifically athletic and physical self perception of these children. An availability sample of 20 overweight and obese subjects (13 girls and 7 boys) between the ages of 9 and 12 years with a mean age of 11 years, participated in a 13 week (3 times/week) multidisciplinary intervention programme. Actical® monitors were used to monitor energy expenditure as well as physical activity levels during 2 weekdays and 1 weekend day before and after the intervention programme. From the results, analyzed by means of t-testing and linear regression, it is apparent that the total energy expenditure of the group, when adjusted for the effect of the intervention, showed a significant increase (p < 0.05) and body fat percentage as well as waist and upper arm circumferences decreased significantly. Although not significant, a decrease of 2,9 kg in body mass and 2,00 kg.rh" in body mass index were also indicated. However, the moderate and high intensity physical activity levels of the groups decreased significantly after the intervention programme. A possible reason for this decrease can be ascribed to the fact that the post-test took place during the school holidays. Further analysis of the data also indicated that the group slept longer hours, which increased their hours spent in the sedentary activity zone. The group also spent more time during the day watching television which also contributed to a decrease in the percentage of time spent in the moderate intensity zone. It is, however, concluded that increased total energy expenditure alone could not bring about effective weight loss and must, therefore, be accompanied by activity in the moderate and high intensity zones. For the purpose of the second aim, twenty children (13 girls and 7 boys) between the ages of 9 and 12 years, with a mean age of 11 years, participated in a 13 week multidisciplinary intervention programme (3 times per week). Eighteen children (11 girls and 7 boys) between the ages of 9 and 12 years, with a mean age of 11 years, served as a control group. Self perception, which consisted of 6 subcomponents, was determined by using the Harter Scale for Self Perception (Harter, 1985). It is clear from the results of the t-test (p < 0.05) that all subcomponents of self perception of the experimental group, especially physical, athletic and global self perception, increased significantly in relation to the control group which remained the same in all the subcomponents (p > 0.05), while a decrease in their social self perception was noted (p < 0.05). The experimental and control group did not differ significantly before the intervention programme, therefore the significant differences with regard to the subcomponents during the post-test, confirm the effect of the programme. On the basis of the abovementioned results the assumption can be made that a multidisciplinary intervention programme holds various benefits for overweight and obese children and is, therefore, another strategy in the prevention of overweight and obesity in children in South Africa. A multidisciplinary intervention programme, as used in this programme, is not only advantageous for weight loss in overweight and obese children, but also significantly improves their self perception. / Thesis (M.Sc. (Human Movement Science))--North-West University, Potchefstroom Campus, 2009.

Various research studies have indicated that the prevalence of overweight and obesity among children and adolescents has increased worldwide and has, therefore, become a serious health problem. Besides the various health implications of childhood obesity, it can also have psychological consequences for these children and they have a greater risk than a normal weight child to suffer from poor self perception. The effect of a physical activity, diet and behaviour modification intervention on the total energy expenditure, physical activity levels and self perception of 9 to 12 year old overweight and obese children is, however, not clear. The aim of the study was firstly to determine the effect of a physical activity, diet and behaviour modification intervention on the total energy expenditure and physical activity levels of 9 to 12 year old overweight and obese children. Secondly, to determine the effect of such an intervention on the self perception, and more specifically athletic and physical self perception of these children. An availability sample of 20 overweight and obese subjects (13 girls and 7 boys) between the ages of 9 and 12 years with a mean age of 11 years, participated in a 13 week (3 times/week) multidisciplinary intervention programme. Actical® monitors were used to monitor energy expenditure as well as physical activity levels during 2 weekdays and 1 weekend day before and after the intervention programme. From the results, analyzed by means of t-testing and linear regression, it is apparent that the total energy expenditure of the group, when adjusted for the effect of the intervention, showed a significant increase (p < 0.05) and body fat percentage as well as waist and upper arm circumferences decreased significantly. Although not significant, a decrease of 2,9 kg in body mass and 2,00 kg.rh" in body mass index were also indicated. However, the moderate and high intensity physical activity levels of the groups decreased significantly after the intervention programme. A possible reason for this decrease can be ascribed to the fact that the post-test took place during the school holidays. Further analysis of the data also indicated that the group slept longer hours, which increased their hours spent in the sedentary activity zone. The group also spent more time during the day watching television which also contributed to a decrease in the percentage of time spent in the moderate intensity zone. It is, however, concluded that increased total energy expenditure alone could not bring about effective weight loss and must, therefore, be accompanied by activity in the moderate and high intensity zones. For the purpose of the second aim, twenty children (13 girls and 7 boys) between the ages of 9 and 12 years, with a mean age of 11 years, participated in a 13 week multidisciplinary intervention programme (3 times per week). Eighteen children (11 girls and 7 boys) between the ages of 9 and 12 years, with a mean age of 11 years, served as a control group. Self perception, which consisted of 6 subcomponents, was determined by using the Harter Scale for Self Perception (Harter, 1985). It is clear from the results of the t-test (p < 0.05) that all subcomponents of self perception of the experimental group, especially physical, athletic and global self perception, increased significantly in relation to the control group which remained the same in all the subcomponents (p > 0.05), while a decrease in their social self perception was noted (p < 0.05). The experimental and control group did not differ significantly before the intervention programme, therefore the significant differences with regard to the subcomponents during the post-test, confirm the effect of the programme. On the basis of the abovementioned results the assumption can be made that a multidisciplinary intervention programme holds various benefits for overweight and obese children and is, therefore, another strategy in the prevention of overweight and obesity in children in South Africa. A multidisciplinary intervention programme, as used in this programme, is not only advantageous for weight loss in overweight and obese children, but also significantly improves their self perception. / Thesis (M.Sc. (Human Movement Science))--North-West University, Potchefstroom Campus, 2009.