Why do athletes make interval training a regular part of their workouts?
Show answer & explanation
Answer: It improves both lasting endurance and quick bursts of power
It builds muscle size faster than dedicated strength training does — Wrong. Hard intervals can feel like strength work and can improve explosive power, so it is easy to mistake them for a muscle-building method. But interval training is primarily cardiovascular work; it raises heart and breathing demands and does not replace dedicated strength training for muscle size.
It burns the most calories of any workout in the shortest time — Wrong. Interval training can burn calories quickly because the hard efforts and recovery keep the session intense, and metabolism can stay elevated afterward. But athletes do not choose it mainly because it beats every other workout for total calories; its defining draw is training endurance and power together.
It improves both lasting endurance and quick bursts of power ✓ — Correct. Interval training alternates short hard efforts with recovery, so the hard bouts demand the anaerobic system for quick power while the repeated work and recovery keep the aerobic system busy. That combination improves lasting endurance and quick bursts of power in one time-efficient session, which is why athletes use it.