Combined Interval Training and Post-exercise Nutrition in Type 2 Diabetes: A Randomized Control Trial

Area of Science:

• Exercise Physiology
• Nutritional Biochemistry
• Metabolic Disease Management

Background:

• High-intensity interval training (HIIT) shows promise for improving cardiometabolic health.
• Previous research suggests post-exercise milk or protein may enhance training adaptations.
• The impact of post-exercise nutrition on HIIT outcomes in type 2 diabetes remains unclear.

Purpose of the Study:

• To investigate if post-exercise milk or protein consumption augments cardiometabolic improvements from HIIT in type 2 diabetes patients.
• To assess the efficacy of nutritional supplementation alongside a structured HIIT program.

Main Methods:

• A 12-week double-blind clinical trial involving 53 adults with type 2 diabetes.
• Participants underwent low-volume HIIT (3 days/week) combined with randomized post-exercise beverages (skim milk, macronutrient control, or placebo).
• Measurements included continuous glucose monitoring, HbA1c, body composition, cardiorespiratory fitness, blood pressure, and endothelial function.

Main Results:

• HIIT significantly improved 24-h mean glucose, HbA1c, body fat percentage, lean mass, cardiorespiratory fitness (VO2 max), endothelial function (%FMD), and reduced mean arterial blood pressure.
• No significant differences in these outcomes were observed between the beverage groups.

Conclusions:

• HIIT is an effective intervention for enhancing cardiometabolic health and reducing cardiovascular risk factors in individuals with type 2 diabetes.
• The addition of post-exercise milk or protein does not provide additional benefits beyond HIIT alone in this population.