High-intensity interval training (HIIT) is a cardiorespiratory training technique that involves short bursts of intense exercise followed by even shorter rest periods. You repeat this cycle several times within a 20- to 30-minute period.

Tabata is a type of HIIT workout that aims to yield the most benefits in a short amount of time. For each exercise, you do eight rounds of 20 seconds of strenuous exercise followed by 10 seconds of rest.