Carol,

Don't sweat the exercise during the early phases of LC'ing...some people even reccomend against adding the physical stress to the body while you're going through such metabolic changes. Your heel spur may have come at the right time .

I don't do Tai Chi, but I have heard wonderful things about disciplines like it and Yoga...almost any regular activity that moves and stretches -- and makes you aware of -- your body has to be something positive.

Sounds like a plan...