What is the Biology of the Human Body While running?

What is the Biology of the Human Body While running? Explain using Biochemistry (carbohydrates, lipids, proteins, nucleic acids, enzymes, membrane transport, etc.), Metabolic Processes (photosynthesis, cellular respiration, lactic acid fermentation, etc.), Molecular Genetics (DNA replication, protein synthesis, biotechnology, etc.), and Homeostasis (thermoregulation. Neural signaling, excretory system, hormones, etc.). Explain how the human body functions inorder to begin running?