<s>[INST] This morning I woke up with pain in the back part of my thighs and buttocks as well as pain in the back of my upper arms. I just turned 70 yesterday and was marveling that I have no aches and pains. And today I received a reminder. Any idea what would cause this? [/INST] Hello, I appreciate your positiveness and your work to maintain your body. At this stage this pain in absence of any other disease can be due to strain due to work or due to improper rest. If you find any of these factors then please rectify those. If such pain continue to persist then I shall advise you to have a complete routine check up. Take care. Hope I have answered your question. Let me know if I can assist you further.  </s>