
The "having to rock from side to side" or keeping shuffling around while trying to stand makes
perfect sense for anybody with ME.
Standing still requires the use of about 360 muscles, all taut, all "fighting" against each other all at once.
It requires all your balance, and
tons of your proprioceptive awareness.
You have to keep your centre of gravity centred and stationary.
It's really, really hard work!
It is FAR easier to rock from side to side or shuffle around a bit.
Your centre of gravity then moves around a bit, you use different muscle groups all the time,
but in smaller batches.Your proprioception lets you know which muscles to use next, you don't need to concentrate on holding your centre of gravity in one position.....
you're more like a gyroscope.
The muscles you've just used get time to recover before being needed again.