Several people in the me community are looking into this atm.
It’s very easy to overdo, and if you are too sick, you might not be able to exercise at all.
But it seems a lot of us are able to build up some strength.
Biggest problem is, it’s terrible easy to overdo, I’ve done it myself, over and over throughout the years.
When your pem subsides, I would try again, but 30 sec only.
It’s something about stopping before the lactate is building up.
Then wait and see.
If it’s ok, keep on with your 30 sec and build one more jump each week or each other week or once a month.
I’m better now than I have been, and finally I’ve been building up, slowly, with some exercises.
But I’ve found there are some kind of exercises I still can’t do.
I couldn’t ride a bicke or do rope skipping.
But others in a me/cfs group I’m part of have built up to running a little bit or lifting weights.
Before, I’ve tried to do some workouts made for my 80 year old mother:
Sit on a chair , rise, and sit down again 10 times in a row.
I still can’t do that, not even 3 times without getting really sick.
But I can sit on my couch or on my yoga ball and lift one knee at the time.
I can’t do exercises where I repeatedly lift my arms over my head.
I can’t sit or stand for 15 minutes at a time and do exercises.
But I can do some, then a break, and do some again.
I lay down for some, sit for some, stand for a few.
If you can afford it, I would strongly advise to by a smartwatch.
It makes it easier to follow your heart rate, among other things.
(Like- if you’re walking, people might set an alarm to go off when the heart beats gets too high. Then they would stop and wait until the heart settles. I tried this as well, but when I’m standing still, my heartbeats are just rising and rising. I’m better off walking than standing. No way would I have known that without my watch)
And you should (most likely, there are discussions going on) keep an eye on your heartrate while you exercise, and stop if it gets too high.
It’s a bit of a puzzle.
But don’t give up.
Maybe you’re better off with something else than rope skipping?
Maybe do only one jump a day?