Aerobic development is the name of the game in the three workouts on Disc Two. With a mixture of moderate-intensity Tempo intervals & Steady State intervals at just below your maximum sustainable intensity the workouts on this disc directly target your aerobic engine. Nothing makes you faster on a bike then increasing your overall power. Carmichael Training Systems Progressive Power DVDÂ’s are designed to do just that Â- use them independently or combine all 5 DVDÂ’s to get 16 power workouts that studies show can increase your overall sustainable power by 12% (Klika et al. 2007). • Each DVD contains three 1-hr workouts. • Also available as a complete 5 Disc DVD pack