Matching Items (15)
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- All Subjects: Exercise
- Creators: Hoffner, Kristin
Description
Cardiovascular disease (CVD) is the number one cause of death in the United States and type 2 diabetes (T2D) and obesity lead to cardiovascular disease. Obese adults are more susceptible to CVD compared to their non-obese counterparts. Exercise training leads to large reductions in the risk of CVD and T2D. Recent evidence suggests high-intensity interval training (HIT) may yield similar or superior benefits in a shorter amount of time compared to traditional continuous exercise training. The purpose of this study was to compare the effects of HIT to continuous (CONT) exercise training for the improvement of endothelial function, glucose control, and visceral adipose tissue. Seventeen obese men (N=9) and women (N=8) were randomized to eight weeks of either HIT (N=9, age=34 years, BMI=37.6 kg/m2) or CONT (N=8, age=34 years, BMI=34.6 kg/m2) exercise 3 days/week for 8 weeks. Endothelial function was assessed via flow-mediated dilation (FMD), glucose control was assessed via continuous glucose monitoring (CGM), and visceral adipose tissue and body composition was measured with an iDXA. Incremental exercise testing was performed at baseline, 4 weeks, and 8 weeks. There were no changes in weight, fat mass, or visceral adipose tissue measured by the iDXA, but there was a significant reduction in body fat that did not differ by group (46±6.3 to 45.4±6.6%, P=0.025). HIT led to a significantly greater improvement in FMD compared to CONT exercise (HIT: 5.1 to 9.0%; CONT: 5.0 to 2.6%, P=0.006). Average 24-hour glucose was not improved over the whole group and there were no group x time interactions for CGM data (HIT: 103.9 to 98.2 mg/dl; CONT: 99.9 to 100.2 mg/dl, P>0.05). When statistical analysis included only the subjects who started with an average glucose at baseline > 100 mg/dl, there was a significant improvement in glucose control overall, but no group x time interaction (107.8 to 94.2 mg/dl, P=0.027). Eight weeks of HIT led to superior improvements in endothelial function and similar improvements in glucose control in obese subjects at risk for T2D and CVD. HIT was shown to have comparable or superior health benefits in this obese sample with a 36% lower total exercise time commitment.
ContributorsSawyer, Brandon J (Author) / Gaesser, Glenn A (Thesis advisor) / Shaibi, Gabriel (Committee member) / Lee, Chong (Committee member) / Swan, Pamela (Committee member) / Buman, Matthew (Committee member) / Arizona State University (Publisher)
Created2013
Description
Purpose: The purpose of this study was to examine the acute effects of two novel intermittent exercise prescriptions on glucose regulation and ambulatory blood pressure. Methods: Ten subjects (5 men and 5 women, ages 31.5 ± 5.42 yr, height 170.38 ± 9.69 cm and weight 88.59 ± 18.91 kg) participated in this four-treatment crossover trial. All subjects participated in four trials, each taking place over three days. On the evening of the first day, subjects were fitted with a continuous glucose monitor (CGM). On the second day, subjects were fitted with an ambulatory blood pressure monitor (ABP) and underwent one of the following four conditions in a randomized order: 1) 30-min: 30 minutes of continuous exercise at 60 - 70% VO2peak; 2) Mod 2-min: twenty-one 2-min bouts of walking at 3 mph performed once every 20 minutes; 3) HI 2-min: eight 2-min bouts of walking at maximal incline performed once every hour; 4) Control: a no exercise control condition. On the morning of the third day, the CGM and ABP devices were removed. All meals were standardized during the study visits. Linear mixed models were used to compare mean differences in glucose and blood pressure regulation between the four trials. Results: Glucose concentrations were significantly lower following the 30-min (91.1 ± 14.9 mg/dl), Mod 2-min (93.7 ± 19.8 mg/dl) and HI 2-min (96.1 ± 16.4 mg/dl) trials as compared to the Control (101.1 ± 20 mg/dl) (P < 0.001 for all three comparisons). The 30-min trial was superior to the Mod 2-min, which was superior to the HI 2-min trial in lowering blood glucose levels (P < 0.001 and P = 0.003 respectively). Only the 30-min trial was effective in lowering systolic ABP (124 ± 12 mmHg) as compared to the Control trial (127 ± 14 mmHg; P < 0.001) for up to 11 hours post exercise. Conclusion: Performing frequent short (i.e., 2 minutes) bouts of moderate or high intensity exercise may be a viable alternative to traditional continuous exercise in improving glucose regulation. However, 2-min bouts of exercise are not effective in reducing ambulatory blood pressure in healthy adults.
ContributorsBhammar, Dharini Mukeshkumar (Author) / Gaesser, Glenn A (Thesis advisor) / Shaibi, Gabriel (Committee member) / Buman, Matthew (Committee member) / Swan, Pamela (Committee member) / Lee, Chong (Committee member) / Arizona State University (Publisher)
Created2013
Description
This study examines the effect of exercise therapy on a stationary bike on cognitive function, specifically inhibition and set-switching, in adolescents with Down syndrome. 44 participants were randomly divided between the voluntary cycling therapy group (VCT) (i.e., self-selected cadence), assisted cycling therapy group (ACT) (i.e., 30% faster than self-selected cadence accomplished by a motor), and a control group (NC) in which the participants did not undergo any exercise therapy. Both cycling groups rode a stationary bicycle, for 30 minutes, three times a week, for eight-weeks. At the beginning (i.e., pretest) and end (i.e., posttest) of the eight-week session the participants completed tasks to evaluate their cognitive function. They completed three trials of the card sort test (i.e., set-switching) and three trials of the knock-tap test (i.e, inhibition) before and after eight-weeks of cycling therapy. The scores of these tests were analyzed using one-way ANOVA between groups and paired samples t-tests. The results showed that after eight-weeks of cycling therapy the participants in the VCT group performed worse in the knock-tap test, but improved in two trials of the card sort test. The results also showed that the participants in the ACT group performed worse after eight-weeks of exercise therapy in one trial of the card sort test. No significant changes were seen for the control group. Due to the fact that on average the participants in the VCT group cycled with a higher heart rate, our results suggest exercise that significantly elevates heart rate can improve cognitive function, specifically set-switching, in adolescents with Down syndrome.
ContributorsBenson, Alicia Meigh (Author) / Ringenbach, Shannon (Thesis director) / Amazeen, Eric (Committee member) / Maraj, Brian (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor)
Created2015-05
Description
The aim was to examine the effectiveness of a cycling intervention on body composition in adolescents with Down syndrome (DS). Four participants completed three interventions over eight consecutive weeks. The interventions were: 1) Voluntary Cycling (VC), in which participants cycled at their self-selected pedaling rate 2) Assisted Cycling (AC), in which the participants' voluntary pedaling rates were augmented with a motor to ensure the maintenance of 80 rpms. 3) No cycling (NC), in which the participants acted as controls. Total weight of the participants and percentage body fat of the participants both decreased but not in values that were statistically significant. The only statistically significant value was the ratio of android fat to gynoid fat, which increased. Future research will try to replicate this data with statistically significant values for more cycling adolescents with DS.
ContributorsFankhauser, Kristin Marie (Author) / Ringenbach, Shannon (Thesis director) / Shaibi, Gabriel (Committee member) / Hillman, Charles (Committee member) / Barrett, The Honors College (Contributor) / School of Nutrition and Health Promotion (Contributor)
Created2014-05
Description
The purpose of this study was to examine the association between VLDL and diabetes risk factors, and the impact of a lifestyle intervention on VLDL levels in obese Latino youth. Participants (N=160) in this study were taken from a lager diabetes prevention program for Latino adolescents (Age=14.8±0.8 years, BMI=98.2±1.4). Youth participated in a 12-week lifestyle intervention that included physical activity (60 minutes, 3x/week) and nutrition education sessions (60 minutes, 1x/week) that were delivered to families at the downtown Phoenix YMCA. Primary outcomes included VLDL and diabetes risk factors including fasting and 2-hour glucose and insulin which were measured at baseline and 12-weeks post-intervention. Baseline VLDL levels were significantly correlated with fasting insulin (r =.270, P<0.01) and youth who were more insulin resistant displayed higher VLDL levels compared to youth who were less insulin resistant derived from fasting insulin levels (M=29.8±14.7 mg/dl vs. M=21.6±9.6 mg/dl, P<0.01). In total, 77 participants completed the lifestyle intervention. At post-intervention, VLDL levels were significantly reduced (M=26.0±13.3 mg/dl to M=23.3±11.6 mg/dl, P=0.02). Culturally-grounded, community-based, family-focused lifestyle interventions are a promising approach for reducing cardiovascular disease risk factors in high-risk youth at risk for diabetes.
ContributorsNavabi, Neeku Ariana (Author) / Shaibi, Gabriel (Thesis director) / Soltero, Erica (Committee member) / Ryder, Justin (Committee member) / School of Nutrition and Health Promotion (Contributor) / Arizona State University. College of Nursing & Healthcare Innovation (Contributor) / Barrett, The Honors College (Contributor)
Created2018-12
Description
Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental disorder. It is primarily misdiagnosed or undiagnosed in women until adulthood is reached. There are multiple effective therapies available once a diagnosis of ADHD is made. These include, but are not limited to, stimulant prescription medications, complementary and alternative medicine therapies (CAM) and gut health. Complementary and alternative medicine therapies can include meditation/spiritual health, Cognitive Behavioral Therapy (CBT), holistic/herbal medicine, exercise/yoga, and diet and dietary supplements. More research on gender differences in ADHD could decrease the misdiagnosis of women who have ADHD and offer more treatment options once a diagnosis is made.
ContributorsMarch, Christina (Author) / Arce, Alma (Thesis director) / Hoffner, Kristin (Committee member) / O'Keefe, Kelly (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor)
Created2023-12
Description
Exercise has emerged as an effective way to treat anxiety and depression. This project first examines the early research on this topic so we can provide a historical context for the thesis. We then look into the contemporary context, where we can see how the topic is being talked about in modern forms of media. Finally, we apply the research to college students. At the end of the paper, you will find a brochure we made specifically for the college student struggling with anxiety or depression.
ContributorsCristante, Lilia (Author) / Ritter, Hailey (Co-author) / Sturgess, Jessica (Thesis director) / Hoffner, Kristin (Committee member) / Barrett, The Honors College (Contributor) / Department of Psychology (Contributor)
Created2022-05
Description
Exercise has emerged as an effective way to treat anxiety and depression. This project first examines the early research on this topic so we can provide a historical context for the thesis. We then look into the contemporary context, where we can see how the topic is being talked about in modern forms of media. Finally, we apply the research to college students. At the end of the paper, you will find a brochure we made specifically for the college student struggling with anxiety or depression.
ContributorsRitter, Hailey (Author) / Cristante, Lilia (Co-author) / Sturgess, Jessica (Thesis director) / Hoffner, Kristin (Committee member) / Barrett, The Honors College (Contributor) / Department of Psychology (Contributor) / Sanford School of Social and Family Dynamics (Contributor)
Created2022-05
Description
Research on the correlation between exercise and mental health outcomes has been a growing field for the past few decades. It is of specific interest to look at how physical activity affects psychological outcomes and it’s efficacy for treating mental health disorders. The current treatment options for depression and anxiety are not suitable for everyone and therefore there is a need for a more accessible and cost-effective form of treatment, like exercise. Furthermore, exercise as a treatment is also linked with many more health benefits. Indeed a wealth of studies have explored the relationships between exercise and depression as well as exercise and anxiety, showing exercise to be a positive predictor of mental health. The following paper will serve to: define depressive and anxiety disorders, explore the research on the effects of physical activity prescriptions on the outcomes of such disorders, create evidence-based applied recommendations for different disorders, and explore the mechanisms by which exercise mitigates symptoms to ultimately accredit the prescription of exercise as a form of treatment for mental health disorders.
ContributorsAddington, Rachel Anne (Author) / Hoffner, Kristin (Thesis director) / Broman, Tannah (Committee member) / College of Health Solutions (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
Swing dancing is a form of partnered dancing that has a focus on social interactions. The purpose of this study is to determine how social factors and intrinsic motivation effect how college age students perceive how much energy exertion swing dancing requires compared to traditional exercise. 20 ASU students were split into 10 female-male couples. The participants first completed a 30-minute session of social dancing and then a week later completed a 30-minute session of cycling on a stationary bike. Physiological data was collected using a Polar heart rate (HR) monitor wristwatch and chest strap. The HR of participants was taken after a period of rest and every five minutes during swing dancing and cycling. The rate of perceived exertion (RPE) was measured based on a Borg scale (6-20). RPE was taken after a period of rest and every five minutes during swing dancing and cycling. After both physiological sessions a psychological survey was distributed measuring the social factors of dancing, the intrinsic motivation of dancing, and the intrinsic motivation of traditional exercise. There was no significant difference between average HR during rest (p=0.34) or during the two types of exercises (p=0.26). There also was no significant difference in RPE during rest (p=0.33) or during the two types of exercises (p=0.46). At the same intensity participants perceived swing dancing to require as much energy exertion as cycling. Participants were significantly more intrinsically motivated to swing dance compared to traditional exercise. Participants reported high levels of social factors while swing dancing and these social factors had a moderately positive effect on intrinsic motivation for swing dancing. People are more intrinsically motivated to engage in swing dancing over traditional exercise and this may be due to the high social factors found in partnered dancing. Swing dancing is a form of exercise that can be used to reach the recommended level of physical activity.
ContributorsJones, Roxann Rose (Author) / Nolan, Nicole (Thesis director) / Hoffner, Kristin (Committee member) / College of Health Solutions (Contributor) / School of Life Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05