High-Intensity Interval Training: Applications for General Fitness Training

H igh-intensity aerobic interval training (HIIT) is a popular strategy for improving cardiorespiratory fitness and health, as well as reducing body fat levels. A standard HIIT protocol involves alternating bouts of both highand low-intensity exercise to increase the amount of high-intensity work performed during an acute bout of training. High-intensity intervals are typically performed above the lactate threshold, close to _ VO2max, and then carried out to a point just before the onset of volitional fatigue. This high-intensity bout is then followed by a low-intensity recovery period that allows the body to buffer and clear lactic acid from the blood, thereby allowing the individual enough time to recover and perform another high-intensity interval.