
Originally Posted by
abexman
Does anyone do interval sprinting without a timer? Or do people count in their heads? I don't want to have to wear anything on my sprinting.
You sprint naked????? Awsome 
Better add something useful, I sprint soccer field lenght, or as far as I can before I have to slow down, then squat till I can breath normalish and do it again.
You know all those pictures of Adam and Eve where they have belly button? Think about it..................... take as long as you need........................