Physical Activity Associates with Muscle Insulin Sensitivity Postbariatric Surgery

Area of Science:

• Metabolic Surgery
• Obesity Medicine
• Exercise Physiology

Background:

• Bariatric surgery is a key treatment for severe obesity, often leading to type 2 diabetes remission.
• The role of physical activity in post-bariatric surgery outcomes requires further investigation.

Purpose of the Study:

• To determine if increased self-reported physical activity after bariatric surgery associates with improved skeletal muscle insulin sensitivity and reduced fat depots.
• To explore the relationship between physical activity and metabolic markers post-surgery.

Main Methods:

• Baecke questionnaire assessed physical activity in 46 patients (18 diabetic, 28 non-diabetic) before and 6 months after bariatric surgery.
• Insulin-stimulated muscle glucose uptake measured via FDG-PET; abdominal fat and liver fat quantified using MRI/MRS.
• Serum proinflammatory cytokines analyzed.

Main Results:

• Patients lost 22.9% body weight in 6 months; physical activity levels significantly increased (P=0.017).
• Improved skeletal muscle insulin sensitivity was linked to increased physical activity (P=0.018).
• Higher physical activity correlated with visceral fat loss (P=0.029), improved hepatic insulin clearance (P=0.02), and reduced inflammatory markers.

Conclusions:

• Self-reported physical activity is linked to improved skeletal muscle insulin sensitivity post-bariatric surgery.
• Increased physical activity is associated with visceral fat reduction and better metabolic profiles in bariatric surgery patients.