Hurdle jumping primarily relies on the aerobic energy system. The aerobic energy system uses oxygen to break down carbohydrates and fat to produce energy for sustained activities. Phosphagen is another energy system that provides short bursts of high-intensity energy for activities lasting only a few seconds, such as sprinting or weightlifting. While hurdle jumping may involve some initial burst of energy from the phosphagen system during the explosive takeoff, it primarily relies on the aerobic system to sustain the activity over an extended period.
