Which exercise is an example of Interval Training?

Interval training is characterized by alternating periods of high-intensity effort with periods of lower-intensity recovery or rest. In the scenario where an individual runs for 30 seconds followed by 30 seconds of walking, this method effectively exemplifies interval training. During the running segment, the intensity is elevated, which potentially boosts cardiovascular fitness, while the walking period allows for recovery, making it sustainable over a longer training session.

The other activities listed focus either on maintaining consistent intensity or engaging in low-intensity practices that do not follow the interval structure. For instance, yoga is typically a steady-state exercise aimed at improving flexibility and strength without intense bursts of activity. Weightlifting without rest emphasizes endurance in strength training rather than alternating intensity levels. Similarly, stretching exercises with gradual increases do not present periods of high intensity followed by rest; they focus on flexibility without the interval format characteristic of interval training.