It feels like there may be some heterogeneity between experiences in feedback/pain? Was your pain similar to mine
@Invisible Woman ?
I really struggled to work out what was going on - blooming brain fog didn't help.
Pre ME my typical exercise included a little horse riding - I was just getting back into that, swimming 2-3 times a week depending & strong muscle toning workout 2-3 times a week depending. Generally, I alternated swimming with muscle toning and always had a minimum of a day off in between, sometimes two, rarely 3 unless I was on a big project or something. I didn't class walking as exercise really.
Swimming quickly fell by the wayside. I just couldn't get through the warm up phase at all and felt dreadful afterwards, really incredibly ill. I also had episodes of sudden loss of power to one or more limbs. Being in the middle of a pool out of your depth doing a forward crawl and suddenly losing power to an arm isn't funny. Or getting out and then finding yourself too weak to dry and dress yourself.
The muscle stretches and toning morphed towards a very gentle form of yoga & I managed to do that for several years. If I was careful. However, yoga with reps would result in horrible pain and muscle weakness & signs of that could be delayed by up to 3 days.
Horseriding went almost immediately. I'd get off the horse and suddenly find I lost power in my legs, I could move them but didn't have the strength, control or accuracy to be able to drive home.
Strength wasn't a problem. I was surprised at how long I retained muscle strength despite not being able to train. For example 10 years or so into my illness, aged about 40, I was physically able to lift something that my 15 year old niece couldn't. I couldn't lift something light repeatedly though.
Repetition triggered that almost sharp, vicious muscle pain that is made worse with movement. Pre ME muscle pain post exercise was eased by gentle movement.
In hindsight anything aerobically challenging was quicker to cause a more generalised feeling of being very ill, sore and swollen glands, feeling feverish, headachy, poisoned and so on.
Walking post ME - everything depends on the pace. Standing hurts more than walking and can result in faintness, dizziness. Walk too slow and balance problems start and it can really hurt the thighs and muscles in the rear, too fast and there may be dizziness, loss of balance too with the added delight of post aerobic symptoms.