Mishler, Anne
(2012)
The Effect of 10- Versus 30-Minutes of Acute Aerobic Exercise on Insulin and Glucose in Obese Adults.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
Introduction: Obesity is associated with insulin resistance often accompanied by hyperinsulinemia and hyperglycemia, placing obese individuals at risk for type 2 diabetes and other chronic diseases. Acute exercise is associated with a decrease in postprandial insulin and glucose, but it is unknown how exercise of varying duration affects these variables. Purpose: The purpose of this study was to compare changes in postprandial insulin and glucose following 10-minutes (10-EX) and 30-minutes (30-EX) of aerobic exercise to a resting (REST) condition. Methods: 9 healthy, sedentary obese men and women (BMI: 33.6±3.2 kg/m2; Age: 45.3±5.7 years) each performed 10-EX, 30-EX and REST in a randomized fashion. Blood was collected in the fasting state, and at 30-minute intervals following breakfast for 120-minutes. All exercise sessions were performed at 70-75% maximal heart rate. Results: Data was collected at all time points for five subjects, which were included in area under the curve (AUC) analyses. There was no significant difference in plasma insulin AUC between REST (12,270±6,148), 10-EX (10,633±5,162), and 30-EX (11,479±4,810) (p=0.354). There was no significant difference in plasma glucose AUC between REST (23,184±6,023), 10-EX (21,735±2,680), and 30-EX (22,899±3,328) (p=0.554). However, the patterns of change were not consistent across experimental conditions. A significant main effect for condition (p=0.018) was detected at 60-MIN for insulin, with lower insulin observed in 30-EX (32.3±12.3) compared to 10-EX (66.8±30.3) or REST (94.9±48.0). Insulin rebounded following exercise and was significantly higher at 120-MIN in 30-EX (74.3±45.2) compared to REST (55.4±45.7) (p=0.042). Plasma glucose followed a similar pattern, and a significant main effect was observed at 90-MIN (p=0.037) at was elevated in 30-EX (147.6±29.0) compared to 10-EX (122.2±21.5) or REST (121.4±38.0). Conclusion: There was no significant difference in plasma insulin or glucose AUC between 10-EX, 30-EX and REST, but pattern of change was not consistent across conditions. Additional research should explore if differences in pattern of change following 10- or 30-minutes of exercise affect health outcomes in obese adults.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
18 September 2012 |
| Date Type: |
Publication |
| Defense Date: |
31 July 2012 |
| Approval Date: |
18 September 2012 |
| Submission Date: |
7 August 2012 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
146 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
School of Education > Health, Physical, Recreational Education |
| Degree: |
PhD - Doctor of Philosophy |
| Thesis Type: |
Doctoral Dissertation |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Exercise, Obese, Insulin, Glucose |
| Date Deposited: |
18 Sep 2012 14:42 |
| Last Modified: |
15 Nov 2016 14:01 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/13475 |
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