Unlike aerobic junkies that burn up their glycogen, I did a sprint workout at the track and popped by ATP-PC system. Okay, I did have to burn some glycogen to get up to speed but not much.
San Diego Velodrome warmup and jumps and then 6x100 meter flying efforts two gear changes with full recovery between efforts. My coach wanted 8 efforts.
I was the only one at the velodrome and, as a former track supervisor, keenly aware of the perils of riding the track alone if something goes wrong. As I generate a lot of fatigue, I can start to lose form. So I decided that I was tired on sprint six but two more would have put me into that highly fatigued state where I can make mistakes. At sprint speed, alone at the track, a mistake is not good (it is never good). So I called it early.