Insulin-sensitivity

Different exercise types increase metabolic rate through distinct physiological pathways. This article examines the evidence for resistance training (lean mass development), high-intensity exercise (EPOC and fat oxidation), and aerobic training (insulin sensitivity) — with specific physiological mechanisms for each.

Physical fitness affects metabolic rate through multiple mechanisms: lean mass accretion, mitochondrial adaptations, and improved insulin sensitivity. This article reviews the evidence on how different fitness components interact with metabolic function.