Starts with the first 1/2 mile. Went out again today and made it that same 1/2 mile I made the other day and was tanked. Told myself, "self, let's go further than 1/2 mile today". Self shouted at me when I got to the end of the road to stop or it was gonna kill itself. Legs were on fire. Lungs burning out of my chest. 1/2 mile, and im tanked. Sigh. Dont like it. No sir, dont like it at ALL!