Theses and Dissertations
This collection includes both ASU Theses and Dissertations, submitted by graduate students, and the Barrett, Honors College theses submitted by undergraduate students.
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- All Subjects: Energy Expenditure
- Creators: School of Nutrition and Health Promotion
Description
Recent research has confirmed and revealed many physical and mental benefits of yoga. The practice of yoga has spread throughout the western world, where it is widely used for the purpose of exercise and fitness. Due to its rise in popularity, there is a need for research regarding the energy expenditure required for different types of yoga. The majority of the literature cites yoga as being an effective exercise for light intensity activity, but there are not as many studies attempting to determine if there are postures and sequences that can meet the requirements for moderate physical activity. In addition, there is a need to validate mobile devices with which to measure energy expenditure (EE) that are compatible with the dynamic movements that occur during yoga. The purpose of this study was to measure energy expenditure of twenty-two yoga practitioners of varying experience during a 30-minute Vinyasa flow yoga practice and from this data collection determine: if an ashtanga-based vinyasa yoga class meets the criteria for moderate intensity physical activity, the reliability between the Actigraph and Oxycon Mobile and the validity of an Actigraph GT3X device worn on the hip in estimating energy expenditure for ashtanga-based vinyasa flow yoga. The Actigraph GT3X and the Oxycon mobile were used to measure energy expenditure. Mean values for energy expenditure recorded by the Oxycon and Actigraph were 3.19 ± 0.42 METs and 1.16 ± 0.23 METs respectively, exhibiting a significant difference in data collection. There was no correlation between the values recorded by the two devices, indicating that the Actigraph was not consistent with the Oxycon Mobile (previously validated for measurement of EE). Results of this study indicate that this Vinyasa flow yoga sequence does satisfy the criteria for moderate intensity physical activity as defined by ACSM with an average EE of 3.19 ± 0.42 METs, and that the Actigraph GT3X is not an accurate device for measurement of EE for yoga.
ContributorsHand, Lindsay Gabrielle (Author) / Huberty, Jennifer (Thesis director) / Buman, Matthew (Committee member) / School of Nutrition and Health Promotion (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
Ghrelin is an acylated peptide hormone with far reaching affects within the human body. Consisting of both central and peripheral effects, ghrelin has been the topic of research since its discovery in 1999. These effects include energy maintenance, cardiovascular health, growth hormone mediation, glucose homeostasis, muscle growth and atrophy, and bone metabolism, all of which work in concert with other well-known physiological mechanisms. With the goal to reproduce a similar study done in females in males, this study hypothesized that ghrelin would present an inverse relationship with a young healthy male population's resting metabolic rates. The study consisted of taking resting metabolic rate measurements, dual-energy X-ray absorptiometry, blood ghrelin testing, and statistical analysis of the data. The hypothesis was shown to be incorrect as the data showed a positive correlation, albeit, with very low statistical significance. Despite the data, past research has shown ghrelin plays a major role in fat gain, fat loss, and energy expenditure. Obesity is plaguing the world and becoming a major pubic health concern. It is necessary to explore causality and casual relationships in order to better understand and combat obesity. Therefore, further research is warranted into ghrelin and energy expenditure as a biomarker or novel treatment for obesity.
ContributorsLopez, Stephen Thomas (Author) / Johnston, Carol (Thesis director) / Levinson, Simin (Committee member) / School of Nutrition and Health Promotion (Contributor) / College of Integrative Sciences and Arts (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12