Would this apply to going outside when it is cold out. I live in Canada and as I am sure most of you are aware of it sometimes gets very cold out. I work a lot outside and I have changed the timing of my qigong to make sure that I don't go out right after. Am I being too cautious or is their some sense in my thinking?

The same goes for the walking qigong is it wise to do it outside when it is cold out? If not what is an acceptable tempurature?

Thanks in advance