Hi,
Chills, could be a side effect regarding a kidney deficiency.
I tend to agree that more qigong , more meditation is better, in general. If there is a deficiency somewhere, that might not play out as well if one pushes practice too hard. One does have to find 'balance' in one's practice too, and, that balance might be relative to your level of physical health in an energetic sense.
I present a possibility, please discern this with your sense of self.
One way you can feed the kidneys is with sword fingers. If you visualize yourself sitting with your back facing you, you can then extend both sword finger hands and feed yourself that way. Clearing the kidneys first would also address any blockages, aside from this.
Along with this, just sitting, and breathing into your lower dan tien. This, feeds the kidneys too. Visualize the kidneys as dark blue. Spend time with this like a meditation. See if it has a good effect on the chill factor. Your kidneys are a source of strength. Sitting doesn't tap them like standing. If you want to feed them, do it more in a non physically demanding way. I only say this relative to the possibility of deficiency there.
Someone can come from a meditation practice, but, perhaps not have spent time feeding the lower dan tien. Maybe more focus in the higher energy centers..
You can feed your kidneys just with that lower dan tien focus as an emphasis in your meditations and active exercise.
I do feel that level I active would eventually bring you where you want to go along with a sense of balance and gradual building.
If you try focusing on feeding your kidneys, given your experiences, you probably will be able to tell if this helps. It certainly won't hurt you in any way doing this.
love,
gallen
