Which metabolic process would be primarily used during prolonged exercise lasting over 2 minutes?

During prolonged exercise lasting over 2 minutes, the primary metabolic process utilized is the oxidative system. This system is responsible for generating ATP through the use of oxygen, enabling sustained energy production for activities that require endurance. The oxidative system primarily relies on carbohydrates and fats as fuel sources, allowing for the maintenance of energy output over longer durations.

As exercise extends beyond the initial minutes, the body transitions away from anaerobic processes, which are more suited to short bursts of intense activity. The oxidative system ramps up to meet the higher energy demands, as it is capable of producing ATP at a rate sufficient to support continuous, prolonged efforts. Additionally, this metabolic pathway is more efficient in terms of ATP yield compared to anaerobic metabolism, which becomes less sustainable over time due to the accumulation of metabolic byproducts.

In summary, the oxidative system is ideally suited for prolonged aerobic activities, helping to sustain effort by utilizing oxygen and promoting endurance rather than relying on the quick bursts of energy provided by anaerobic pathways.