For the oxidative energy system, the typical work duration is within which range?

• A. 60-120 seconds
• B. 180-300 seconds
• C. 120-300 seconds
• D. 120-360 seconds

Answer: (C)

The oxidative energy system relies on oxygen to produce ATP, so it’s the aerobic pathway that powers longer, steady efforts. It doesn’t deliver energy quickly enough for very short, explosive bursts, but as duration extends, this system ramps up and becomes the primary source of ATP for sustained work. That makes it most characteristic of mid-length to longer-duration activities, where the demand lasts long enough for aerobic metabolism to support the effort.

Among common teaching ranges, this mid-length window best represents the period when oxidative metabolism is the dominant contributor. Shorter ranges are dominated more by the immediate-energy systems, while longer ranges involve ongoing aerobic energy with additional endurance adaptations.