<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  What is the role of oxygen in aerobic exercise? Context: Oxygen plays a crucial role in aerobic exercise by breaking down glucose to produce energy. Answer: [/INST]Oxygen helps to break down glucose and produce energy during aerobic exercise.</s>