Same or similar experience here. When I was younger I was aware of the strains of thinking,"harder", "outside the box", "deliberately to explore new concepts or paradigms". As I have recently turned 50 the toll for the same exercises seems much higher and almost debilitating. Memorization and reading have similar effects but not the same degree. Anything creative, analytical, or especially if it's a cross section of the two can be more than tiring but actually physically painful, i.e. headache, "false" eye strain, malaise, even depressive emotional waves, etc. One example might be developing a complex spreadsheet to track, control, measure and record work on a project. Recently the doctor said my blood pressure was just great but that it was still most likely tension or stress causing my headaches.
Same or similar experience here. When I was younger I was aware of the strains of thinking,"harder", "outside the box", "deliberately to explore new concepts or paradigms". As I have recently turned 50 the toll for the same exercises seems much higher and almost debilitating. Memorization and reading have similar effects but not the same degree. Anything creative, analytical, or especially if it's a cross section of the two can be more than tiring but actually physically painful, i.e. headache, "false" eye strain, malaise, even depressive emotional waves, etc. One example might be developing a complex spreadsheet to track, control, measure and record work on a project. Recently the doctor said my blood pressure was just great but that it was still most likely tension or stress causing my headaches.