Exercise in type 2 diabetes: to resist or to endure?

Area of Science:

• Exercise Physiology
• Metabolic Health
• Type 2 Diabetes Research

Background:

• Insulin resistance and type 2 diabetes significantly impact glucose metabolism.
• Both aerobic and resistance exercise acutely reduce post-exercise glucose profiles.
• Optimal long-term exercise strategies for glycaemic control in these populations require further investigation.

Purpose of the Study:

• To compare the long-term glycaemic control benefits of endurance versus resistance exercise in insulin-resistant individuals with and without type 2 diabetes.
• To elucidate the molecular mechanisms underlying acute exercise-induced glucose uptake.
• To identify factors influencing individual responses to chronic exercise interventions.

Main Methods:

• Review of current evidence on acute and chronic exercise effects on glucose metabolism.
• Analysis of molecular pathways involved in exercise-induced glucose transport (e.g., AMPK, insulin signaling, mTOR).
• Discussion of genetic factors (e.g., NDUFB6 variants) and their potential modulation of exercise response.

Main Results:

• A single bout of either endurance or resistance exercise similarly reduces 24-hour glucose profiles in insulin-resistant individuals, irrespective of type 2 diabetes status.
• Acute aerobic exercise enhances glucose transport via AMPK and insulin signaling pathways.
• Chronic resistance training promotes muscle protein synthesis and mass via the mTOR pathway.

Conclusions:

• Long-term glycaemic control efficacy is likely determined by consistent adherence to exercise rather than specific exercise modalities.
• Individual variability in response to long-term training necessitates further research.
• Future studies should focus on real-life adherence and personalized exercise prescriptions for managing type 2 diabetes and insulin resistance.