High Intensity Intervals are one of the most efficient ways to get the most out of your workout. This class uses a type of HIIT called Tabata, a four-minute workout consisting of 8 rounds of 20 seconds of work at maximum effort, followed by 10 seconds of rest. This may sound simple but it’s seriously challenging and has a major payoff. This is day 3 of 14-Day Full-Body Burn.