How do high-intensity interval training (HIIT) sessions affect metabolism?

High-intensity interval training (HIIT) sessions are known to have a significant impact on metabolism, particularly in terms of post-exercise oxygen consumption. After engaging in HIIT, the body experiences an effect known as excess post-exercise oxygen consumption (EPOC), which refers to the heightened rate of oxygen intake following strenuous activity. This phenomenon results in an increase in metabolic rate as the body works to restore itself to its pre-exercise state.

The elevated post-exercise oxygen consumption contributes to improved calorie burn not just during the HIIT session, but also afterward. This post-exercise metabolic boost can last for hours or even days, depending on the intensity of the workout and the individual’s fitness level. Thus, incorporating HIIT into a fitness regimen can effectively enhance metabolic efficiency and support weight management or fat loss goals.

The other options presented do not align with the established effects of HIIT on metabolism. For instance, suggesting that HIIT decreases post-exercise oxygen consumption or has no effect on metabolism contradicts the research demonstrating the increased EPOC associated with these intense workouts. Moreover, stating that HIIT is only beneficial for muscle gain overlooks its extensive evidence supporting cardiovascular adaptations and metabolic enhancements.