The term Lucy comes from the song by the Beatles Lucy in the Sky with Diamonds which is commonly thought to be about LSD. Lucy is often used as a code word for LSD when referring to the drug in a public setting or over the phone where one does not want to openly discuss illegal activities. Lucy is used like a person's name in such discussions. Like saying Lucy took me on a trip last night to indicate you tripped on LSD the previous night. I tripped balls with Lucy last weekend!
The capacity of your body to store muscle and liver glycogen, however, is limited to approximately 1,800 to 2,000 calories worth of energy, or enough fuel for 90 to 120 minutes of continuous, vigorous activity.
a pound of glycogen. If you have 20 pounds of excess fat, to store the same amount of calories as glycogen would require 40 pounds. Most tissues can use fat to make ATP. Metabolism of fat always requires O 2 and fatty acids are degraded to form CO 2 in the mitochondria. CO 2 is removed from the body by breathing, and it ultimately goes to the atmosphere.