You are walking down the street. All of a sudden, you hear a huge dog barking. It runs towards you and jumps over its fence and begins to run at you. You turn around and run down the street. Thankfully, you reach the end of the street and cross at the corner. The dog stops at the corner and barks you on your way. As you get to the other side, you stop and breathe deeply, attempting to recover, emotionally and physically, from what just happened. Your muscles are on fire. Explain the processes of energy usage taking place in your muscles throughout this experience. When was oxygen used? Did you ever use the glycolysis pathway? When did lactic acid come in?