I don't attach any great significance to this, but do find it a little interesting, and would like to hear what other's think, or have experienced?
I have lately noticed an increased tendency to become very cold during meditation practice, regardless of the ambient temperature wherever I sit.
Also, an occasional shiver (of the type described as "someone walking on your grave") arises when my concentration is quite deep.
I have a friend who seems to generate lots of heat when she sits - which she puts down to "positive energy" arising. We both have slightly below average blood pressures. I went through a phase of energetic sitting, where my body jumped around a little, but this seems to have passed
Do you get hot under the collar, feel a post meditation chill, or have never been subject to either change?