– Produces ATP as fast as possible while still relying on aerobic processes
– Raises Anaerobic threshold and Increases your power output at Anaerobic threshold
– Improve oxygen utilization of the working muscles-
– Increase size of slow twitch fibers by causing local hypoxia thru tempo
– increased stroke volume that comes from either a greater stretch of the heart muscle due to increased blood flow or increased contractility of the heart muscle due to strengthening.
Complete the following circuit – alternating from lower body exercise to upper body exercise – while keeping your heart rate no higher than Zone 3. Choose very light weights so you can keep good form and maintain the proper heart rate zone throughout the 45 seconds.