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Today I finished the london marathon. My legs are fucked but my HPPD feels reduced. During the race there was a few times where I felt disconnected from my legs (actually not a bad thing lol) and had some bad derealization. As it got more painful on my legs I noticed more symptoms like trails, colour changing etc. I think that the stress I put on my body today caused a whole host of endorphins and hormones to be released and that directly affected my HPPD. Now I have finished the race my baseline symptoms seem a lot lower than normal which is very pleasing. I wonder if hard exercise could hold a potential treatment for hppd. Has anyone else noticed anything similar when doing strenuous exercise?