Theres a high number of people who had no previous issues prior to cfs. How many of those would have said they were above level of fitness, maybe played a sport at a quite high level of standard, not neccessarily pro but say an A grade standard club player and above?
I think this can show the initial severity of the infection can play a big part in this too.
This is a good question.
Out those who developed ME/CFS from catching a virus, I would like to know:
how many people had what you might call "ME/CFS lite" beforehand?
I certainly had very mild manifestation of ME/CFS symptoms all my life, from my school years onwards, decades before a nasty respiratory virus I caught precipitated my ME/CFS proper.
I came down with ME/CFS proper in my early forties; but throughout my life, I found I was always more mentally tired than my peers at the end of the 9 to 5 pm day of work. For example, I was always amazed at my friends and colleagues who would complete a day's work at the office, and then do some sporting activity straight afterwards in the early evening, and then after that, spend the rest of the evening socializing and drinking in a bar. I could not figure out where they got the energy to do that; and yet that level of energy they had seemed to be the norm, and it was me that was the abnormal low energy individual.
For me, if I completed a day's work and then engaged in 45 minutes of exercise (like swimming say) straight afterwards in the early evening, that would leave me completely mentally shattered, such that if I tried to socialize after that, I'd find I literally had no mental energy to even speak with people. I have had some embarrassing moments going for a drink with some colleagues after work and after doing some exercise, where I found my entire mind was so exhausted that it had "seized up", and I simply could not respond to people's conversation or questions. I would sit there with my colleagues, but I was like a dumb mute. I simply found formulating sentences almost impossible. My brain did not have the energy to speak. (Normally however I'd be pretty talkative and gregarious socially).
Of course, this was only a very minor impediment to my life, as this mental exhaustion only occurred when I did too much on one day, like working the whole day and then doing exercise straight after.
But this having no energy to even speak phenomenon that I experienced many times does indicate to me that I had "ME/CFS lite" all my life. It therefore seems to me that I already had some propensity to ME/CFS long before I developed ME/CFS proper.
Do many people with ME/CFS recall experiencing some minor symptoms of ME/CFS all their lives, long before they developed ME/CFS proper?