To interval train, simply push yourself to your maximum effort for several minutes several times in your routine, with short periods of rest in between sets. (functionalhealthnews.com)
The idea is that by using short bursts of intense work intervals followed by short periods of rest you can burn more fat when compared to steady - state cardio. (coachcalorie.com)
In the past there would be acute moments of stress followed by periods of rest but today we are in a constant state of chronic stress with very short periods of rest. (nicolejardim.com)