Non-Cardiac Orthostatic Adapation Mechanisms?

[green]

Has anyone ever seen any research that the body can adapt to orthostatic stress through mechanisms other than the heart?

I'm wondering, because I got a part-time job recently that involves standing, walking briskly, and sometimes pushing or lifting heavy things, for six to eight hours at a time.

By Heart BPM stays way below my threshold for breathing hard and getting winded, so I don't think it's much of a workout.

However, I have been doing it for a month. I feel like maybe, my POTS is getting better as a result.

It's hard to tell though, because I also stopped doing traditional exercise outside of light weight-lifting 2X a week, and its gotten a lot colder, so those things could be helping me.

[anaphylaxing]

Checkout the "Levine protocol" and article discussing exercise treatment for POTS

[janiedelite]

Your skeletal muscles, particularly in your legs, are often used to improve venous return. I realized that I had orthostatic intolerance when I discovered that I could never stand still, but would always rock from foot to foot while standing.

[rubytuesday]

My cadiology specialist in dysautonomia instructed me to use recumbent stationary bike, to criss-cross my legs while standing, to shivel whenever standing, to try to pump calf muscles by tightening/squeezing and releasing and going up and down on toes while standing. He also has me doing treadmil in aquaciser in physical therapy program to try to build strength and endurance in the calves and venous system (I have EDS also). Also, no raising arms above heart level for me or lifting or bending at waist (orthostatic hypotension with autonomic nervous system failing).