I sometimes experience confusion and impaired memory following strenuous exercise.

[VeritasX]

Does anyone ever provide answers here?  I have the same problem as described above.  I'm 63.  Over the last ten years or so I have had over a dozen such episodes, usually beginning during a strength training workout in which I work to failure - working very hard to get one more rep.  I get fuzzy headed, loose track of thoughts, and wonder if a thought was about something that actually happened or about something I dreamed - as I totally loose the thought.  At some point during the episode, maybe 30 to 60 minutes into it I feel like my mind is totally going - then that passes and I am left dull and struggling to remember how to do simple things like use the remote.  This lasts for several hours.  The next day I am near normal, but less than 100% for a few days.  These are always scary and make me wary of exertion.