As you progress beyond basic aerobic fitness, incorporating faster VO2 max interval training alongside your lactate threshold workouts becomes crucial. These higher-intensity intervals push your body into its anaerobic system to meet the elevated oxygen demands, leading to a significant increase in lactic acid. When lactic acid production outpaces your body's ability to clear it, you incur an oxygen debt. The primary aim of these workouts is to elevate your VO2 max, which, in turn, enhances the speed and efficiency with which your body can remove lactate.
These workouts and the physiological adaptations they trigger boost your VO2 max – the maximum rate at which your body consumes and utilizes oxygen during strenuous exercise. Consequently, a higher VO2 max allows you to sustain a faster pace before reaching the point where lactate removal becomes a limiting factor.
Because achieving VO2 max is highly demanding, these sessions incorporate longer, though still incomplete, recovery periods. This extra rest doesn't diminish the benefits. Due to the increased intensity, your heart rate will remain elevated even during recovery. Therefore, "active recovery" is recommended for these VO2 max intervals. Low-intensity activity during recovery helps maintain a higher heart rate, enabling you to return to your VO2 max more quickly and facilitating faster lactate clearance.
