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Questions and Answers
What characterizes diabetes as a chronic metabolic disease?
What characterizes diabetes as a chronic metabolic disease?
Diabetes is characterized by hyperglycemia resulting from defects in insulin secretion and/or an inability to utilize insulin.
Identify two main physiological processes involved in regulating blood glucose levels in type 2 diabetics.
Identify two main physiological processes involved in regulating blood glucose levels in type 2 diabetics.
Insulin secretion from the pancreas and the utilization of insulin in peripheral tissues are the main processes.
What is the primary treatment goal for diabetes management?
What is the primary treatment goal for diabetes management?
The primary treatment goal is to achieve stable blood glucose levels and prevent complications.
List two complications that can arise with exercise in diabetics.
List two complications that can arise with exercise in diabetics.
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How can exercise aid in the management of type 2 diabetes?
How can exercise aid in the management of type 2 diabetes?
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What role does the GLUT-4 vesicle play in glucose transport?
What role does the GLUT-4 vesicle play in glucose transport?
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What distinguishes type 1 diabetes from type 2 diabetes?
What distinguishes type 1 diabetes from type 2 diabetes?
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What is considered a significant challenge in managing type 2 diabetes during exercise?
What is considered a significant challenge in managing type 2 diabetes during exercise?
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What does an A1C blood test measure?
What does an A1C blood test measure?
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What is the target blood pressure for individuals managing diabetes?
What is the target blood pressure for individuals managing diabetes?
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What dietary considerations should be made for diabetes management?
What dietary considerations should be made for diabetes management?
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What effect does insulin have on glucose transport in skeletal muscle?
What effect does insulin have on glucose transport in skeletal muscle?
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Name one common medication used to treat diabetes and its classification.
Name one common medication used to treat diabetes and its classification.
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What is the initial condition of adipose tissue during the development of insulin resistance?
What is the initial condition of adipose tissue during the development of insulin resistance?
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How much exercise is recommended weekly for individuals with diabetes?
How much exercise is recommended weekly for individuals with diabetes?
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How does excess lipids affect insulin signaling in skeletal muscle?
How does excess lipids affect insulin signaling in skeletal muscle?
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What happens to insulin levels during exercise and why is this significant?
What happens to insulin levels during exercise and why is this significant?
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What is the LDL cholesterol target for diabetes management?
What is the LDL cholesterol target for diabetes management?
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List two common acute complications of hyperglycemia.
List two common acute complications of hyperglycemia.
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Identify one barrier to effective diabetes management mentioned.
Identify one barrier to effective diabetes management mentioned.
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What is the suggested exercise frequency for individuals with diabetes to maximize cardiovascular benefits?
What is the suggested exercise frequency for individuals with diabetes to maximize cardiovascular benefits?
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What are two symptoms of hypoglycemia?
What are two symptoms of hypoglycemia?
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What are the chronic complications of diabetes related to neuropathy?
What are the chronic complications of diabetes related to neuropathy?
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Why is weight management particularly important for those with Type 2 Diabetes Mellitus (T2DM)?
Why is weight management particularly important for those with Type 2 Diabetes Mellitus (T2DM)?
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Define diabetic retinopathy and mention one of its symptoms.
Define diabetic retinopathy and mention one of its symptoms.
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What combination of exercise types is recommended for better blood glucose control in T2DM patients?
What combination of exercise types is recommended for better blood glucose control in T2DM patients?
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What should individuals on hypoglycemic medication consider in relation to their food intake during exercise?
What should individuals on hypoglycemic medication consider in relation to their food intake during exercise?
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What A1C level should most people aim for to manage blood sugars effectively?
What A1C level should most people aim for to manage blood sugars effectively?
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What does it indicate when glucose utilization exceeds glucose production during exercise?
What does it indicate when glucose utilization exceeds glucose production during exercise?
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How do insulin and counterregulatory hormone concentrations in diabetics differ from those in non-diabetics during exercise?
How do insulin and counterregulatory hormone concentrations in diabetics differ from those in non-diabetics during exercise?
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What is the key problem faced by diabetics who engage in regular exercise?
What is the key problem faced by diabetics who engage in regular exercise?
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What should be monitored to ensure normoglycemia during exercise?
What should be monitored to ensure normoglycemia during exercise?
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How does acute exercise influence fatty acid partitioning compared to sedentary subjects?
How does acute exercise influence fatty acid partitioning compared to sedentary subjects?
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What role does GLUT-4 translocation play in diabetes during exercise?
What role does GLUT-4 translocation play in diabetes during exercise?
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What effect does acute exercise have on plasma glucose levels in diabetics?
What effect does acute exercise have on plasma glucose levels in diabetics?
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Explain how acute exercise can prevent lipid-induced insulin resistance.
Explain how acute exercise can prevent lipid-induced insulin resistance.
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What are the long-term implications of increased IMTG storage from acute exercise?
What are the long-term implications of increased IMTG storage from acute exercise?
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Describe the impact of exercise on insulin sensitivity in Type II diabetic individuals.
Describe the impact of exercise on insulin sensitivity in Type II diabetic individuals.
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What is the relationship between acute exercise and the action of fatty acid translocase (FAT/CD36)?
What is the relationship between acute exercise and the action of fatty acid translocase (FAT/CD36)?
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Why is the understanding of glycemic instability in Type II diabetes critical for treatment?
Why is the understanding of glycemic instability in Type II diabetes critical for treatment?
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What effect does exercise have on glucose transport in relation to insulin resistance?
What effect does exercise have on glucose transport in relation to insulin resistance?
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List three substances that accumulate in muscle during exercise to stimulate glucose transport.
List three substances that accumulate in muscle during exercise to stimulate glucose transport.
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What is the 'athlete's paradox' in relation to IMTG and insulin sensitivity?
What is the 'athlete's paradox' in relation to IMTG and insulin sensitivity?
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How does a single session of exercise affect insulin sensitivity?
How does a single session of exercise affect insulin sensitivity?
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What role do lipogenic enzymes play following a single session of exercise?
What role do lipogenic enzymes play following a single session of exercise?
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In what situation might the proposed mechanism of partitioning fatty acids toward IMTG synthesis be particularly important?
In what situation might the proposed mechanism of partitioning fatty acids toward IMTG synthesis be particularly important?
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What happens to fatty acids in muscle cells during exercise regarding storage?
What happens to fatty acids in muscle cells during exercise regarding storage?
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How does exercise facilitate the movement of GLUT-4 within the cell?
How does exercise facilitate the movement of GLUT-4 within the cell?
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Study Notes
Module 3: Cardiovascular Exercise Principles
- Module: Cardiovascular
- Week: 3
- Instructor: Dr. Tanya Holloway, PhD, ACSM-RCEP
Exercise Prescription for Common Chronic Conditions: Diabetes
- Topic: Exercise prescription for diabetes
-
Learning Objectives:
- Define diabetes
- Identify physiological processes in regulating blood glucose and factors contributing to high blood glucose levels in type 2 diabetes
- Identify treatment goals for diabetes and the role of exercise in management
- Describe complications of exercise in diabetics
- Design effective exercise strategies for managing type 2 diabetes
Types of Diabetes
- Diabetes: A chronic metabolic disease characterized by hyperglycemia resulting from defects in insulin secretion and/or an inability to utilize insulin.
- Type 1 Diabetes: An autoimmune disease affecting children and adults, caused by the destruction of beta cells in the pancreas, resulting in decreased insulin production.
- Type 2 Diabetes: A metabolic disease characterized by insulin resistance in peripheral tissues and defective insulin secretion.
- Gestational Diabetes: Glucose intolerance developing during pregnancy due to contra-insulin effects during pregnancy.
Blood Glucose Control and Type 2 Diabetes
- Blood Glucose Control: Impaired in Type 2 Diabetes
Glucose Transport in Skeletal Muscle
- Overview of glucose transport steps: glucose in blood, insulin, exercise, cytosol, GLUT-4 vesicle.
- Key Point: Glucose transport into skeletal muscle can be insulin-stimulated or exercise-stimulated.
Pathophysiology of Insulin Resistance
- Adipose Tissue (AT): Becomes insulin resistant before skeletal muscle.
- Healthy AT: Adipocyte hypertrophy, inflammation, ROS emission
- Lipolysis: Increased release of fatty acids from adipose tissue, accumulation in skeletal muscle
- Effect of Excess Lipids: Lipid transport accumulation on skeletal muscle membrane, production of reactive lipids (DAGs, ceramides).
- Important Point: High lipid environment leads to insulin resistance and hyperglycemia.
Diabetic Complications
- Acute Complications: Hyperglycemia (manifestations), hypoglycemia (potential causes), diabetic ketoacidosis, hyperglycemic hyperosmolar nonketotic syndrome, common symptoms such as headache, weakness fatigue, too much insulin/oral agents, insufficient carbs, excessive or poorly planned exercise)
- Chronic Complications: Peripheral, somatic, and autonomic neuropathies, nephropathies, retinopathies, macro/microvascular complications, diabetic foot ulcers, and infections.
Exercise Prescription in Diabetes
- Treatment Goals: Diet, medication, regular exercise.
- Follow the ABCDEs: A1C, blood pressure, cholesterol, drugs to protect your heart, exercise & eating, screening for complications, self-management, stress, and other barriers
- Exercise Intensity: Moderate-intensity continuous training (MICT), high-intensity interval training (HIIT), 150 min or more of moderate-to-vigorous intensity activity weekly.
- Glucose Control Goals: Glucose control, prevention of diabetes-related complications, CVD risk factor reduction
- Diabetes Mellitus: Exercise Testing: ECG stress testing, annual CVD risk factor assessments, mode of exercise testing based on the presence of complications.
- Diabetes Mellitus: Exercise Prescription: Aim to maximize cardiovascular benefits with exercise frequency of greater than 3 d per week, promote healthy weight loss, resistance exercise confers similar metabolic benefits to aerobic exercise in individuals, combination of aerobic and resistance exercise improves glucose control more than exercise alone.
- Individualized Exercise Programming: Based on medical history, medication schedule, presence and severity of diabetic complications, exercise program goals. Endurance and resistance exercise are included for improving cardiorespiratory fitness, body composition, and muscular strength/endurance. Food intake is important for those on hypoglycemic medications, and increasing carbohydrate intake may be necessary during exercise.
Insulin Sensitivity and Exercise
- Acute exercise: Improves insulin sensitivity
- Exercise and glucose transport: Glucose transport is independent of insulin.
- Chronic Exercise training: Improves insulin action and blood glucose control, improves cardiovascular and metabolic fitness, reduces risk factors for development and progression of type 2 diabetes (obesity, hypertension, high blood cholesterol)
Contraindications
- Blood glucose levels should be checked to avoid complications
- Postpone if blood glucose is > 14 mmol/L and ketones are present.
- Individuals with complications (retinopathy, peripheral neuropathy, autonomic neuropathy, nephropathy, or hypertension), or undergoing special conditions (high-intensity training/Valsalva maneuvers) should modify exercise accordingly.
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Description
Explore the principles of cardiovascular exercise in this comprehensive module. Focusing on exercise prescription for diabetes, it covers physiological aspects of glucose regulation, treatment goals, and effective exercise strategies. Learn how to manage type 2 diabetes through practical exercise approaches.