High-Intensity Interval Training: How Long Should Your Active Intervals and Recovery Periods Be?

  High-intensity interval training is a unique type of workout structure. These fast-paced, body-drenching sessions alternate active intervals of intense exercise and periods of rest or recovery. There’s a reason that high-intensity interval training, or HIIT, is skyrocketing in popularity. For one, it’s the most time-expedient way to work out.…