Table 1. Three Categories of Interval Training

Three different categories of HIIT
Long intervals: 3 to 15 min at 85% to 90% VO2peakMedium intervals: 1 to 3 min at 95% to 100% VO2peakShort intervals: 10 sec to 1 min at 100% to 120% VO2peak
HIIT: High-Intensity interval training