Which training method involves work and rest intervals with repeated efforts?

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

Answer: (B)

Interval training uses work and rest intervals that are repeated to drive performance. You work hard for a set period or distance, then recover briefly, and you repeat multiple times. This approach lets you train at higher intensities than you could with continuous exercise, and you can adjust the lengths of work and rest to target different energy systems—short, intense bursts develop speed and anaerobic capacity, longer intervals boost aerobic endurance. A common example is sprint repeats on a track: push hard for 30 seconds, recover for 60 seconds, then repeat. This differs from continuous training, where you maintain a steady pace with no planned breaks. It’s also different from circuit training, which visits a series of different exercises with short rests and aims for overall conditioning, not the repeated high-intensity work–rest cycles of a single effort. Plyometric training centers on explosive power through jumps, not on structured work/rest repeats.