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- All Subjects: Physical Education
- Creators: Harper, Erin
- Creators: Ainsworth, Barbara E
Description
Background: Limited physical activity (PA) is a key factor contributing to obesity and independently protects from diseases in youth and later in life. Students spend most of their time in schools sedentary and have limited opportunities to engage in PA. By making changes to the school environment and developing a school culture that actively supports and reinforces PA behavior, Comprehensive School Physical Activity Programs are designed to make PA engagement throughout each school day the accepted social norm. The purpose of this study was to determine the effects of environmental and behavioral modifications to school-level PA participation for girls and boys.
Methods: This study used a hybrid reversal design by alternating baseline phases with two intervention phases that provided increased access and opportunity to PA, and behavioral prompting and reinforcing plus access and opportunity, for all students to engage in PA during lunch. Physical activity and contextual data were collected using a previously validated instrument (System for Observing Play and Leisure Activity in Youth; SOPLAY). Behavioral data were collected using a novel instrument (System for Observing Behavioral Ecology for Youth in Schools; SOBEYS) developed to measure prompting and reinforcement contingencies of PA participation consistent with the Behavioral Ecological Model.
Data Analysis: The number of students engaged in moderate-to-vigorous PA (MVPA) and the proportion of students in MVPA were analyzed using visual analysis of graphic data and general linear statistical models, with environmental and behavioral variables as predictors.
Results: Increases in the number of girls and boys in MVPA were seen visually and statistically during the environmental and the environmental plus behavioral intervention phases compared to baseline. No differences were seen visually or statistically between intervention phases. Intervention effects were larger for boys than girls. The SOBEYS instrument was able to produce valid and reliable data regarding prompting and reinforcement of PA. However, environmental factors appear to have a greater influence on PA than behavioral factors.
Conclusion: Modifying the school environment to increase access and opportunity for PA during lunch can lead to positive changes in MVPA during the school day, with special consideration needed to engage more girls.
Methods: This study used a hybrid reversal design by alternating baseline phases with two intervention phases that provided increased access and opportunity to PA, and behavioral prompting and reinforcing plus access and opportunity, for all students to engage in PA during lunch. Physical activity and contextual data were collected using a previously validated instrument (System for Observing Play and Leisure Activity in Youth; SOPLAY). Behavioral data were collected using a novel instrument (System for Observing Behavioral Ecology for Youth in Schools; SOBEYS) developed to measure prompting and reinforcement contingencies of PA participation consistent with the Behavioral Ecological Model.
Data Analysis: The number of students engaged in moderate-to-vigorous PA (MVPA) and the proportion of students in MVPA were analyzed using visual analysis of graphic data and general linear statistical models, with environmental and behavioral variables as predictors.
Results: Increases in the number of girls and boys in MVPA were seen visually and statistically during the environmental and the environmental plus behavioral intervention phases compared to baseline. No differences were seen visually or statistically between intervention phases. Intervention effects were larger for boys than girls. The SOBEYS instrument was able to produce valid and reliable data regarding prompting and reinforcement of PA. However, environmental factors appear to have a greater influence on PA than behavioral factors.
Conclusion: Modifying the school environment to increase access and opportunity for PA during lunch can lead to positive changes in MVPA during the school day, with special consideration needed to engage more girls.
ContributorsLorenz, Kent Arnold (Author) / Van Der Mars, Hans (Thesis advisor) / Hodges Kulinna, Pamela (Committee member) / Ainsworth, Barbara E (Committee member) / Hovell, Melbourne F (Committee member) / Arizona State University (Publisher)
Created2014
Description
The study was based on research done on the achievement goal theory. The purpose of the study was to discover if goal orientation would change after manipulation of the motivational climate. The study also was conducted to find if there was evidence of gender differences in motivational climate preference and satisfaction. These findings may help to provide a fun and motivating environment for all children in a physical activity setting. Investigators manipulated the climate to present lessons that were more task orientated in nature (mastery climate), and lessons that were more ego oriented in nature (performance climate). Participants consisted of girls and boys ages eight to ten years old (M = 9.5) recruited from a fourth grade P.E. class (n=42, females=20, males=22). The children participated in activities in a mastery and performance climate. The Task and Ego Orientation in Sport Questionnaire (TEOSQ), the Athlete in Sport Questionnaire (ASQ), and the Perceived Motivational Climate in Sport Questionnaire 2 (PMSQ-2) were administered. From the data it was concluded that there were no gender differences between baseline task and ego orientation scores. The children also did not perceive a performance climate after the performance climate intervention There were no gender differences in satisfaction following the mastery climate and the performance climate. The children's task and ego personal goal orientation scores on the PMCSQ-2 did not change following the mastery climate or the performance climate. There may be an absence of a gender difference in satisfaction and possessing either a task or ego orientation due to the factor of age. The student's regular PE coach enforces a mastery climate in their class, which may explain why the participants did not perceive a performance climate during the performance climate intervention. There were some methodological hurdles and problems in conducting the present study, which may account for the results.
ContributorsHolt, Rachelle Brooke (Author) / Hoffner, Kristin (Thesis director) / Harper, Erin (Committee member) / Barrett, The Honors College (Contributor) / School of Nutrition and Health Promotion (Contributor) / Department of Psychology (Contributor)
Created2014-05
Description
Training the bench press exercise on a traditional flat bench does not induce a level of instability as seen in sport movements and activities of daily living. Because of this, many new types of equipment have been created in an attempt to induce instability, such as the COR Bench. 15 males and 7 females between the ages of 18 and 30 were recruited for the present study, which tested two forms of instability: using one dumbbell rather than two, and lifting on the COR bench compared to a flat bench. Thusly, EMG was used to measure muscle activity in four separate conditions of unilateral bench press movements: on a flat bench with one dumbbell, on a flat bench with two dumbbells, on the COR Bench with one dumbbell, and on the COR Bench with two dumbbells. Results indicated that lifting with one dumbbell compared to two dumbbells on the flat bench significantly increased muscle activity across all four muscles being analyzed (pectoralis major, p = .005; middle trapezius, p = .008; external obliques, p = .004; and internal obliques, p = .003), but lifting with one dumbbell compared to two dumbbells on the COR Bench only significantly increased muscle activity in the middle trapezius (p = .001), external obliques(p = . 032), and internal obliques (p = .001). The only muscle to exhibit a significant increase in muscle activity when going from one dumbbell on the flat bench to one dumbbell on the COR Bench was the middle trapezius (p = .010). These results imply that the COR Bench itself does not increase muscle activity as much as switching from two dumbbells to one dumbbell, regardless of the bench being used.
ContributorsPatterson, Jeffrey (Author) / Harper, Erin (Thesis director) / Broman, Tannah (Committee member) / Cataldo, Donna (Committee member) / Barrett, The Honors College (Contributor) / School of Nutrition and Health Promotion (Contributor)
Created2013-12
Description
Medial compartment knee osteoarthritis (OA) is a disease whose severity has been associated with the peak adduction moment during walking (pKAM). Unfortunately, measuring patients' pKAM to track their therapy progress involves the use of a gait laboratory which is expensive and time intensive. This study aimed to develop and assess a regression method to predict the pKAM using only plantar pressure measurements. This approach could greatly reduce the burden of evaluating pKAM.
ContributorsThomas, Kevin Andrew (Author) / Hinrichs, Richard (Thesis director) / Harper, Erin (Committee member) / Favre, Julien (Committee member) / Barrett, The Honors College (Contributor) / Harrington Bioengineering Program (Contributor)
Created2014-05