In a 30-minute activity where students run across a field as fast as they can while passing a soccer ball, then walk back and repeat, which method is used to develop aerobic capacity?

• A. Interval training
• B. Circuit training
• C. Continuous training
• D. Fartlek

Answer: (A)

Alternating high-intensity work with short recovery periods builds aerobic capacity by challenging the body's ability to deliver and use oxygen during repeated efforts. In this scenario, students sprint across the field and pass a ball, then walk back to recover before repeating for a total of 30 minutes. Those repeated bursts of near-maximal effort followed by recovery exemplify interval training, which is specifically designed to improve endurance by training the heart, lungs, and muscles to sustain work through efficient recovery between hard bouts.

Continuous training would involve a steady, unbroken pace without structured recoveries, so it wouldn’t maximize the repeated high-intensity work needed here. Fartlek involves varied pace within a continuous session but is less structured than planned work-rest intervals. Circuit training mixes different exercises at stations, not the single running-and-recovery format described. The defined alternation of sprint and walk-recovery fits interval training best.