Mitochondria are membrane-bound organelles responsible for generating approximately 95% of the body's ATP through oxidative phosphorylation. Metabolically active cells — cardiac muscle, skeletal muscle, neurons, and liver cells — contain thousands of mitochondria per cell. The mitochondrial theory of ageing holds that the accumulation of mitochondrial DNA damage, declining mitochondrial membrane potential, and reduced mitochondrial biogenesis are primary drivers of the biological ageing process.
How to Build Mitochondrial Density
- Zone 2 aerobic exercise is the primary mitochondrial biogenesis stimulus — it activates PGC-1α
- High-intensity interval training provides a complementary stimulus through different pathways
- Fasting and caloric restriction activate mitophagy — selective removal of damaged mitochondria
- Cold exposure activates brown adipose thermogenesis and drives mitochondrial biogenesis
- Adequate CoQ10 (ubiquinol form in adults over 40) — a component of the electron transport chain
mitochondriamitochondrial healthlongevityenergyageingcellular health