Hello, Thanks for choosing health care magic for posting your query. I have gone through your question in detail and I can understand what you are going through. If there is no more pain in legs and headache then you need not bother. If it returns then you need to see a medical doctor. Many times such physical exercise causes accumulation of lactic acid in the muscles which causes pain and this also causes systemic inflammatory reaction causing headache as well. Yo may use paracetamol during such episodes in future. Hope I am able to answer your concerns. If you have any further query, I would be glad to help you. In future if you wish to contact me directly, or want to any further details about the asked query, you can use the below mentioned link: bit.ly/dr-srikanth-reddy Wish you good health, Kind regards Dr. Srikanth Reddy M.D.