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Peer-reviewed articles on diabetes and exercise. Reviewed by specialists, based on latest research.
Understanding Blood Glucose — Numbers and Meanings
Comprehensive guide to glucose readings: fasting, post-meal, HbA1c, and healthy ranges for Type 2 diabetes.
Core Glucose Measurements
Normal fasting glucose: 4.0-5.5 mmol/L. Random glucose: under 7.8 mmol/L. HbA1c (3-month average): normal below 5.7%.
Diabetic Targets
Per ADA 2026: HbA1c below 7%, fasting 4.4-7.2 mmol/L, 2-hour post-meal below 10 mmol/L. Targets individualized per case.
Time in Range (TIR)
New concept: percentage of time glucose stays between 3.9-10 mmol/L. Target: 70%+ daily. More actionable than HbA1c for daily tracking.
How Exercise Lowers Glucose — The Science
The physiological mechanism of exercise on glucose, insulin sensitivity, and oxidation.
Mechanism
Exercise pulls glucose from blood into muscles without needing insulin (GLUT4 transporter). This lowers glucose immediately.
Insulin Sensitivity
Resistance training builds muscle = more insulin receptors = better sensitivity. Effect lasts 48-72 hours post-exercise.
Post-meal Walking
10-15 min walk after meals reduces glucose peak by 30%. More effective than a long workout before meals.
HIIT and Diabetes — Safe or Risky?
High-intensity training for Type 2: benefits, risks, and when to avoid.
Proven Benefits
HIIT improves HbA1c more than traditional cardio (2024 study). Better visceral fat burning. Rapidly improves cardiovascular fitness.
Risks
Raises heart rate to potentially dangerous levels for cardiac patients. Causes delayed hypoglycemia 4-6 hours later. Significant BP spikes.
Who Should Avoid
Cardiac patients, recent retinal hemorrhage, uncontrolled BP, severe neuropathy. Medical consultation essential.
Why Resistance Training Matters More Than You Think
Building muscle for diabetics: more than strength, it's glucose control.
Muscles = Glucose Storage
Muscles store 80% of body's glucose. More muscle = greater capacity to "absorb" sugar from blood.
High Intensity Preferred
Recent research: 75-80% of 1RM beats 50% for Type 2. Faster muscle growth + higher insulin sensitivity.
ADA 2026
Official recommendation: 2-3 sessions weekly on non-consecutive days. 8-12 reps × 2-3 sets per major muscle group.
Hypoglycemia During Exercise — How to Respond
Comprehensive guide to preventing and treating low blood sugar during/after exercise.
Symptoms
Shaking, cold sweat, dizziness, severe weakness, confusion, sudden hunger. If you feel any, stop immediately and test glucose.
Quick Treatment
15-15 Rule: consume 15g fast carbs (3 dates, half glass juice, 4 glucose tablets). Wait 15 min. Test again.
Delayed Hypoglycemia
Can occur 4-12 hours post-exercise especially after HIIT. Check glucose before sleep if exercising in evening.
Eating Before and After Exercise for Diabetics
What and when to eat for best results with safety.
Before Exercise
If glucose below 5.5: 15-20g carbs (half banana, apple). If above 5.5: no need. If HIIT: light meal 30 min prior.
During Exercise
For exercises under 1 hour: water only. Over 1 hour: 15g carbs every 30 min if needed.
After Exercise
Protein + carbs within 30 minutes. Example: egg + apple, or yogurt + nuts. Helps recovery and glucose stability.