Depleting Session #2

Enter FTP

Large amounts of tempo work in today's session, but the focus here is on fuel. To produce zone 3 power and above requires a significant amount of glycogen. But what happens when this fuel source has been depleted? In today's workout we begin with a steady-state zone 3 effort, followed by a series of bottom end, zone 4 intervals. All of this is followed by the same opening zone 3 interval. Take note and compare your sensations and heart rate response in the two steady-state tempo efforts. Is the final tempo effort as comfortable as the first?