They have a good effect on the blood circulation and cardiovascular system, as well as on the ability of the blood vessels (correct english?) to contract.
Why they should train the CNS is beyond me.[/quote]
I think you’re right on with your assessment. I think there is a CNS effect because it puts your body in a sort of “shock” mode. Like someone slapping you in the face 3or 4 times.
But, make no mistake about it hot/cold therapy works!
Here’s what I do:
20 min in 83 degree pool. Then 5 min in 103 degree hot tub, and then back again in 83 degree pool.
When the facilities are not available I simply try to duplicate that in the shower. However, I go a bit colder in the shower 70 degrees or so.