Unlike subcutaneous fat, visceral fat surrounding internal organs is metabolically active and highly inflammatory. It produces harmful molecules like interleukin-6 and tumor necrosis factor, actively driving systemic inflammation and chronic disease.
A key benefit of fasting occurs upon re-feeding. The body releases a surge of stem cells from the bone marrow, including progenitor cells that travel through the circulation to repair damaged tissues, particularly the lining of blood vessels.
Fasting significantly increases natural growth hormone production. By scheduling resistance training towards the end of a fasting window—the peak of the fast—one can leverage this hormonal advantage to better retain and potentially build muscle mass.
The body compensates for high sugar intake by producing excess insulin. This chronic high insulin (hyperinsulinemia) causes metabolic damage like fatty liver and visceral fat accumulation long before blood sugar becomes uncontrollable and diabetes is diagnosed.
Contrary to popular belief, extreme aerobic activity like marathon training can lead to chronic inflammation and a higher incidence of coronary artery disease. For heart health, short bursts of activity like HIIT and resistance training are superior to long-duration cardio.
Weight loss from prolonged fasting engages a different physiology than simple calorie restriction. The body appears to retract skin more effectively during a fast, preventing the excess, loose skin often seen after significant weight loss from traditional dieting.