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Pancreatic insulin response in relation to exercise training.
Canadian Journal of Physiology and Pharmacology
|October 1, 1983
Summary
Exercise training diminishes pancreatic insulin secretion in response to glucose and other stimuli. This study shows reduced plasma insulin levels in trained rats, impacting glucose regulation and metabolic health.
Area of Science:
- Endocrinology
- Metabolic Physiology
- Exercise Science
Background:
- Pancreatic insulin secretion is crucial for glucose homeostasis.
- The impact of exercise training on insulin response to various stimuli requires further investigation.
- Understanding exercise effects on pancreatic function is key for metabolic health research.
Purpose of the Study:
- To quantify the effects of endurance exercise on pancreatic insulin secretion.
- To assess insulin response to both glucose and non-glucose secretagogues following training.
- To provide direct evidence on exercise-induced alterations in insulin release patterns.
Main Methods:
- Wistar female rats were divided into trained and sedentary groups for 10 weeks.
- In vivo glucose, tolbutamide, and arginine tolerance tests were conducted.
- Tests were performed on non-anesthetized animals 40 hours post-exercise.
Main Results:
- Exercise training significantly reduced plasma insulin levels.
- This reduction was observed following administration of glucose, tolbutamide, and arginine.
- Trained rats exhibited diminished insulin response to all tested secretagogues.
Conclusions:
- Exercise training attenuates pancreatic insulin secretion.
- The effect extends to both glucose-dependent and independent insulin secretagogues.
- Findings highlight exercise's role in modulating pancreatic endocrine function and glucose metabolism.