When performing the active exercises from either level 1 or level 2 my hands and fingers in particular become extremely cold like coming from a cold snowy day outside. This is particulary so fo the moving of yin and yang, breathing of the universe, joining of yin and yang exeercises. I never experienced this in the past and has been occuring over past few months.

However, a friend has his hands go extremely hot and needs to cool them or they go extremely red and hot.

Any ideas why there should be two totally different responses from the same exercises. (ps The room is not particularly cold neither are my hands when i start)

Thanks
Hakim